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Basic C++ MCQ

1. The ____________________ of relational and logical operators is said to be from left to right.

Relational

Precedence

Semantic

Associativity

Answer

Correct Answer: Associativity

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2. Closing a file causes any unsaved information still held in the file buffer to be ________.

Saved to the file

Deleted

Retained in the buffer for safekeeping

Duplicated

None of these

Answer

Correct Answer: Saved to the file

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3. Consider the following statement: double alpha[10][5];. the number of components of alpha is ____.

100

150

Answer

Correct Answer: 50

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4. The sort usually performs fewer exchanges than the sort.

Bubble, selection

Binary, linear

Selection, bubble

ANSI, ASCII

Answer

Correct Answer: Selection, bubble

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5. An array's size declarator must be a(n) with a value greater than .

Constant integer expression, zero

Zero, constant integer expression

None of these

All of these

Answer

Correct Answer: Constant integer expression, zero

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6. An array can easily be stepped through by using a ________.

For loop.

Reference variable.

Named constant.

Null value.

Answer

Correct Answer: For loop.

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7. A(n) ____________________ is a memory location whose contents can be changed.

Variable

String

Implicit

Simple

Answer

Correct Answer: Variable

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8. Every byte in the computer's memory is assigned a unique ________.

Pointer

Address

Dynamic allocation

Name

None of these

Answer

Correct Answer: Address

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9. In c++, you can create aliases to a previously defined data type by using the ____ statement.

Typedef

Namespace

Using

Alias

Answer

Correct Answer: Typedef

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10. A variable's ________ is the part of a program in which the variable may be accessed.

Standard

Scope

Global

All of these

Answer

Correct Answer: Scope

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11. A ____ structure is also referred to as a loop.

Recursion

Repetition

Selection

Sequence

Answer

Correct Answer: Repetition

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12. ________ to a base class may be assigned the address of a derived class object.

Static members

Private members

Public members

None of these

Answer

Correct Answer: Private members

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13. ________ must be included in a program in order to use the cout object.

Opening and closing braces

The header file iostream

Comments

Escape sequences

None of these

Answer

Correct Answer: The header file iostream

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14. _______ is a construct that defines objects of the same type.

An object

A data field

A class

A method

Answer

Correct Answer: An object

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15. A(n) ________ is a variable, usually a bool, that signals when a condition exists.

Flag

Step

Project

Answer

Correct Answer: Flag

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16. The do-while loop is considered a(n) _________ loop.

Post-test.

Pre-test

None of these

Infinite

Limited

Answer

Correct Answer: Post-test.

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17. Which statement is true when declaring the member variable count as static? class my_class{ public: static int count;};

All objects that try to access their count member variable actually refer to the only class-bound static count variable.

The variable is allocated only once, regardless of how many objects are instantiated, because it is bound to the class itself, not its instances.

The variable existd when no objects of the class have been defined, so it can be modified at any point in the source code.

The variable cannot be modified by any part of the code in the same application or thread. However, other threads may modify it.

Answer

Correct Answer: The variable cannot be modified by any part of the code in the same application or thread. However, other threads may modify it.

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18. What is this expression equivalent to?

A->B

*(A.B)

B=A

(*A).B

&A.B

Answer

Correct Answer: (*A).B

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19. Which choice is a reason to specify the type of a pointer instead of using void *, which works as a pointer ro any type?

The compiler needs the dara type to make sure that the pointer is not going to be used on illegal non-pointable types such as functions, labels, pointers, and reference.

Void * does not work for any type. The language does not allow assigning anything other than void to a pointer to void *.

The compiler needs the data type to know how much memory to allocate for the pointer, because different data types require different pointer lengths.

Yes, it causes a compiler error because one field is defined as having a size of 0.

Answer

Correct Answer: The compiler needs the data type to know how much memory to allocate for the pointer, because different data types require different pointer lengths.

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20. Other than shifting bits to the left, what is the << oprator used for ?

Shifting characters to the left in a string.

Inserting characters into an output stream like std::cout.

Comparing floating point numbers as less-than.

Assigning a variable to a reference.

Answer

Correct Answer: Inserting characters into an output stream like std::cout.

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21. Consider this function declaration of is_even, which takes in an integer and returns true if the argument is an even number and false otherwise. Which declarations are correct for overloaded versions of that function to support floating point numbers and string representations of numbers? bool is_even(int);

Bool is_even(float f); bool is_even(char *str);

Bool is_even(float f); bool is_even(char str);

Bool is_even_float(float f); bool is_even_str(char *str);

Float is_even(float f); char *is_even(char *str);

Answer

Correct Answer: Bool is_even(float f); bool is_even(char *str);

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22. What is a variable of type double?

A 2-tuple

An integer number

A floating point number

A string with more than 255 characters

Answer

Correct Answer: A floating point number

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23. What is the purpose of this line in a header file? #pragma once

To restrict the use of its contents to only one source file

To tell the compiler that only one variable can be instantiated from the classes or types contained in this header file

To help the compiler finish faster by assuring that only one compiler pass is neccessary for the code included in this header file

To make the compiler parse that header file only once, even if it is included multiple times in the source

Answer

Correct Answer: To make the compiler parse that header file only once, even if it is included multiple times in the source

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24. What is one benefit of declaring the parameter as a const reference instead of declaring it as a regular object? int median(const my_array& a)

Actually, objects cannot be passed as regular variables, because they require a constructor call. Therefore, a const reference is the only way to pass class instances to functions.

There are no benefits because a reference and an object are treated as the same thing.

The const qualifier Forbids the code to modify the argument, so the programmer can rest assured that the source object will remain unchanged.

The argument is passed as a reference, so the Function receives a copy that can be modified without affecting the original variable.

Answer

Correct Answer: The const qualifier Forbids the code to modify the argument, so the programmer can rest assured that the source object will remain unchanged.

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25. What is the main difference between these two Functions? std::mutex::lock() Std::mutex::try_lock()

Lock() has a higher privilege over try_lock(). This means that you have a better chance of acquiring a mutex with lock().

Both attempt to acquire a lock, but lock() blocks if the mutex is not available, whereas try_lock() returns whether the mutex is available or not.

Lock() enforces preemption, whereas try_lock() suggests preemption.

If the mutex is not available, try_lock() returns with a corresponding code, whereas lock() snatches the mutex from the thread that currently has it.

Answer

Correct Answer: Both attempt to acquire a lock, but lock() blocks if the mutex is not available, whereas try_lock() returns whether the mutex is available or not.

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26. What is the purpose of a destructor?

It allows the programmer to write the necessary code to free the resources acquired by the object prior to deleting the object itself.

It deletes an object. One example of a destructor is the delete() function.

It terminates a program. This may be achieved as a regular function call or as an exception.

There are no destructors in C++.

Answer

Correct Answer: It allows the programmer to write the necessary code to free the resources acquired by the object prior to deleting the object itself.

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27. Consider a class named CustomData. Which choice is a correct declaration syntax to overload the postfix ++ operator as a class member?

CustomData& operator++();

Void operator++(CustomData);

CustomData operator++(CustomData);

CustomData operator++(int);

Answer

Correct Answer: CustomData operator++(int);

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28. What does this function do? auto buff = new char[50]; Std::memset(buff,20,50);

It declares a memory buffer named buff that starts at address 20 and ends at address 70.

It sets all bits in the array named buffer from its element at index 20 to its element at index 50.

It writes the value 20 in every memory address from buff to buff+49.

It declares a memory buffer named buff that starts at address 20 and ends at address 50.

Answer

Correct Answer: It writes the value 20 in every memory address from buff to buff+49.

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29. What is this expression equivalent to? A->B->C->D

A.B.C.D

*A.*B.*C.*D

&A.&B.&C.&D

*(*((*A).B).C).D

Answer

Correct Answer: *(*((*A).B).C).D

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30. What is an appropriate way of removing my_object as shown below? my_class *my_object = new my_class();

Delete(my_object);

Free(my_object);

The garbage collector will destroy the object eventually.

Exiting the scope will destroy the object.

Answer

Correct Answer: Delete(my_object);

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31. What is the assumed type of a constant represented in the source code as 0.44?

Double

Long float

Long double

Float

Answer

Correct Answer: Double

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32. Which of the following is not a consequence of declaring the member variable count of my_class as static? class my_class { public: static int count;}

The variable cannot be modified by any part of the code in the same application or thread. However, other threads may modify it.

The variable exists even when no objects of the class have been defined so it can be modified at any point in the source code.

The variable is allocated only once, regardless of how many objects are instantiated because it is bound to the class itself, not its instances.

All objects that try to access their count member variable actually refer to the only class-bound static count variable.

Answer

Correct Answer: The variable cannot be modified by any part of the code in the same application or thread. However, other threads may modify it.

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33. What would be the output of this code? int32_t nums[3]={2,4,3}; std::cout << ( nums[0] << nums[1] << nums[2] );

The output is the addresses of nums[0], nums[1], and nums[2], in that order, with no spaces.

256

243

Answer

Correct Answer: 256

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34. What's wrong with this definition when using a pre-C++11 compiler?

Std::vector> thematrix;

There's nothing wrong with it.

An std::vector cannot contain more std::vector containers as its elements.

The correct syntax should be: std::vector[std::vector[int]] thematrix;

>> is parsed as the shift-right operator, and thus results in a compile error.

Answer

Correct Answer: >> is parsed as the shift-right operator, and thus results in a compile error.

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35. What does this part of a main.cpp file do? #include "library.h"

It causes the toolchain to compile all the contents of library.h so that its executable code is available when needed by the final application.

It cherry picks library.h for the declarations and definitions of all data and functions used in the remainder of the source file main.cpp, finally replacing the #include directive by those declarations and definitions.

It informs the linker that some functions or data used in the source file main.cpp are contained in library.h, so that they can be called in run time. This is also known as dynamic linking.

It causes the replacement of the #include directive by the entire contents of the source file library.h. This is similar to a Copy-Paste operation of library.h into main.cpp.

Answer

Correct Answer: It causes the replacement of the #include directive by the entire contents of the source file library.h. This is similar to a Copy-Paste operation of library.h into main.cpp.

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36. How can C++ code call a C function?

By simply calling the C code

There is no way for C++ to call a C function

By using extern "C"

By importing the source C code

Answer

Correct Answer: By using extern "C"

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37. What is the .* operator and what does it do?

It is the same as the class member access operator, or arrow operator (->), which allows you to access a member of an object through a pointer to the object.

It is the pointer to member operator, and it allows you to access a member of an object through a pointer to that specific class member.

It is the member access with address of operator, which returns the address of a class or struct member.

It is a combination of the member access operator (.) and the dereference operator (*), so it allows you to access the object that a member pointer points to.

Answer

Correct Answer: It is the pointer to member operator, and it allows you to access a member of an object through a pointer to that specific class member.

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38. Which statement is true?

Only classes can have member variables and methods.

C++ supports multiple inheritance.

C++ supports only single inheritance.

Only structs can inherit.

Answer

Correct Answer: C++ supports multiple inheritance.

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39. What is the difference between a public and a private class member?

Public members are the same as global variables, so every part of the code has access to them. Private members are the same as automatic variables, so only their class has access to them.

Public members are made accessible to any running application. Private members are made accessible only to the application where the object is instantiated.

Public members will be compiled as shared variables in a multithreaded environment. Private members will be compiled as Thread-local variables.

Public members can be accessed by any function. Private members can be accessed only by the same class's member functions and the friends of the class.

Answer

Correct Answer: Public members can be accessed by any function. Private members can be accessed only by the same class's member functions and the friends of the class.

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40. What is the output of this code? printf("1/2 = %f",(float)(1/2));

1/2 = 0.499999

1/2 = 0

1/2 = 0.000000

1/2 = 0.5

Answer

Correct Answer: 1/2 = 0.000000

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41. What is the output of this code? int c=3; char d='A'; std::printf("c is %d and d is %c",c,d);

C is d and d is c

C is A and d is 3

C is 3 and d is A

C is c and d is d

Answer

Correct Answer: C is 3 and d is A

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42. What is true about the variable named ptr? void *ptr;

It is a pointer initialized at NULL.

It is a pointer to a void function.

That declaration causes a compiler error, as pointers must specify a type.

It is a pointer to a value with no specific type, so it may be cast to point to any type.

Answer

Correct Answer: It is a pointer to a value with no specific type, so it may be cast to point to any type.

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43. What is the meaning of the three sections specified between parentheses in a for loop separated by semicolons?

The first is the iterating variable name, the second is the number of times to iterate, and the third is the desired increment or decrement (specified with a signed integer).

The first is the initialization block, the second is the condition to iterate, and the third is the increment block.

The first is the iterating variable, the second is the container in which it should operate, and the third is an exit condition to abort at any time.

The first is the iterating variable name, the second is the starting value for the iterating variable, and the third is the stop value (the last value plus one).

Answer

Correct Answer: The first is the initialization block, the second is the condition to iterate, and the third is the increment block.

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44. What is the meaning of the two parts specified between parentheses in a range-based for loop, separated by a colon?

The first is a variable declaration that will hold an element in a sequence. The second is the sequence to traverse.

The first is an iterator, and the second is the increment value to be added to the iterator.

The first is the iterating variable. The second is an std::pair that specifies the range (start and end) in which the variable will iterate.

The first is a container object. The second is an std::pair that specifies the range (start and end) in which the elements will be accessed within the loop.

Answer

Correct Answer: The first is a variable declaration that will hold an element in a sequence. The second is the sequence to traverse.

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45. What is the ternary operator equivalent to this code snippet? if(x) y=a; else y=b;

Y=a?b:x;

Y=if(x?a:b);

Y=(x&a)?a:(x&b)?b:0;

Y=x?a:b;

Answer

Correct Answer: Y=x?a:b;

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46. A class template is a _?

Class written with the generic programming paradigm, specifying behavior in terms of type parameter rather than specific type.

Blank superclass intended for inheritance and polymorphism.

Lass that only consists of member variable, with no constructor, destructor nor member functions.

Skeleton source code for a class where the programmer has to fill in specific parts to define the data types and algorithms used.

Answer

Correct Answer: Class written with the generic programming paradigm, specifying behavior in terms of type parameter rather than specific type.

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47. What does auto type specifier do in this line of code (since C++11)? auto x = 4000.22;

It specifies that the type of x will be deduced from the initializer - in this case, double.

It specifies that the type of x is automatic meaning that if can be assigned different types of data throughout the program.

It specifies that x is a variable with automatic storage duration.

It specifies that more memory will be allocated for x in case it needs more space, avoiding loss of data due to overflow.

Answer

Correct Answer: It specifies that the type of x will be deduced from the initializer - in this case, double.

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48. What is an lvalue?

It's a constant expression, meaning an expression composed of constants and operations.

It's an expression that represents an object with an address.

It's an expression suitable for the left-hand side operand in a binary operation.

It's a location value, meaning a memory address suitable for assigning to a pointer or reference.

Answer

Correct Answer: It's an expression that represents an object with an address.

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49. Which of the following is not a difference between a class and a struct?

Because structs are part of the C programming language, there are some complexity between C and C++ structs. This is not the case with classes.

Classes may have member functions; structs are private.

The default access specifier for members of struct is public, whereas for member of class, it is private.

Template type parameters can be declared with classes, but not with the struct keyword.

Answer

Correct Answer: Classes may have member functions; structs are private.

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50. Which of the following operators is overloadable?

New

Answer

Correct Answer: New

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51. What's a benefit of declaring the parameter as a const reference instead of declaring it as a regular object? int median(const my_array& a);

The argument is passed as a reference, so the function receives a copy that can be modified without affecting the original value.

The argument is passed as a reference, so if the passed my_array object is large, the program will require less time and memory.

Actually objects can't be passed as regular variables because they require a constructor call. Therefore a const reference is the only way to pass class instances to functions.

There are no benefits because a reference and an object are treated as the same thing.

Answer

Correct Answer: The argument is passed as a reference, so if the passed my_array object is large, the program will require less time and memory.

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52. Which of the following is a true statement about the difference between pointers and iterators?

While pointers are variable that hold memory address, iterators are generic functions used to traverse containers. These function allows the programmer to implement read and write code as the container is traversed.

Incrementing an iterator always means access the next element in the container(if any), no matter the container. Incrementing the pointer means pointing to the next element in memory, not always the next element.

Pointers are variables that hold memory address where as iterator are unsigned integers that refers to offsets in arrays.

All iterator are implemented with pointers so all iterators are pointers but not all pointers are iterators.

Answer

Correct Answer: Incrementing an iterator always means access the next element in the container(if any), no matter the container. Incrementing the pointer means pointing to the next element in memory, not always the next element.

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53. Which of the following is a reason why using this line is considered a bad practice? (Alternative: Why is using this line considered a bad practice?) Using namespace std;

The compiled code is always bigger because of all of the imported symbols.

If the code uses a function defined in two different libraries with the same prototype but possibly with different implementations, there will be a compilation error due to ambiguity.

It automatically includes all header files in the standard library (cstdint, cstdlib, cstdio, iostream, etc).

It causes the compiler to enforce the exclusive inclusion of header files belonging to the standard library, generating compilation error when a different header file is included.

Answer

Correct Answer: If the code uses a function defined in two different libraries with the same prototype but possibly with different implementations, there will be a compilation error due to ambiguity.

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54. A variable listed in a header is known as a(n) ____ parameter.

Actual; actual

Formal; formal

Actual; formal

Formal; actual

Answer

Correct Answer: Actual; formal

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55. A for loop is considered a(n) ________ loop.

Pre-test

Post-test

Infinite

Limited

None of these

Answer

Correct Answer: Post-test

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56. A ______ is a symbol used to represent a location in memory.

Variable

Double

Scanner

None of these

Answer

Correct Answer: Variable

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57. In c++, :: is called the scope ____ operator.

Reference

Automatic

Resolution

Code required to accomplish the task

Answer

Correct Answer: Resolution

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58. Each node of a singly linked list has two components: and .

Info; head

Link; back

Back; head

Info; link

Answer

Correct Answer: Info; link

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59. Dynamic memory allocation occurs ________.

When a new variable is created by the compiler

When a new variable is created at runtime

When a pointer fails to dereference the right variable

When a pointer is assigned an incorrect address

None of these

Answer

Correct Answer: When a new variable is created at runtime

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60. Another term for repetition structures is __________

Assignment operator

Extended selection structures

Coding

Loop

Answer

Correct Answer: Loop

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61. _____ are programs that test code to ensure that it contains no syntax errors.

Endorsers

Quantifiers

Validators

Testers

Answer

Correct Answer: Validators

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62. You can use the ____ operator to increment or decrement the value of an enumeration type.

Mutator

Assignment

Using

Cast

Answer

Correct Answer: Cast

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63. When you write a program that stores a value in a variable, you are using ____ storage.

Algorithm

Temporary

Numeric

Control break

Answer

Correct Answer: Temporary

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64. Data types that are created by the programmer are known as ________.

Variables

Abstract data types (ADTs)

Functions

Parameters

None of these

Answer

Correct Answer: Abstract data types (ADTs)

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65. Data sent by a program to the screen, a printer, or a file is __________.

Output

Integer

Modulus

String

Answer

Correct Answer: Output

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66. An example of a floating point data type is ____.

Int

Char

Double

Short

Answer

Correct Answer: Double

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67. In c++, ____ is called the scope resolution operator.

;

Answer

Correct Answer: ::

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68. ________ members of a base class are never accessible to a derived class.

Private

Public

Protected

All of these

None of these

Answer

Correct Answer: Private

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69. ________ are data items whose values cannot change while the program is running.

Literals

Variables

Comments

Integers

None of these

Answer

Correct Answer: Literals

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70. When the ________ is placed in front of a variable name, it returns the address of that variable.

Conditional operator

Asterisk ( * )

Ampersand ( & )

Semicolon ( ; )

None of the above

Answer

Correct Answer: Ampersand ( & )

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71. When ____ are introduced in a program, they are immediately given a value.

Arguments

Namespaces

Parameters 3

Module variables

Answer

Correct Answer: Module variables

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72. The class dclass is derived from the class bclass using the ____ type of inheritance.

Public

Private

Protected

Static

Answer

Correct Answer: Private

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73. The class ____ is the base of the classes designed to handle exceptions.

Class

Exception

Logic_error

Runtime_error

Answer

Correct Answer: Runtime_error

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74. The ____ operator can be used to return the address of a private data member of a class.

Dereferencing

Address of

Destructor

Member access

Answer

Correct Answer: Address of

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75. The ____ loop provides three actions in one compact statement.

For

While

Do until

Repeat

Answer

Correct Answer: For

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76. Objects both in the real world and in object-oriented programming contain ____ and methods.

Behaviors

Attributes

Help

Primitive data types

Answer

Correct Answer: Attributes

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77. Object-oriented programmers sometimes say an object is one ____ of a class.

Enumeration

Instantiation

Member

Reference

Answer

Correct Answer: Instantiation

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78. In some programming languages, ___________ are implemented as arrays whose elements are characters.

Strings

Arrays

Character

Subscript

Answer

Correct Answer: Strings

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79. Classes can create new classes from existing classes. this important feature ____.

Encourages code reuse

Results in more software complexity

Provides public access to the internal state of an object

Aids the separation of data and operations

Answer

Correct Answer: Encourages code reuse

Note: This Question is unanswered, help us to find answer for this one

80. A ________ search uses a loop to sequentially step through an array.

Binary.

Unary.

Linear.

Relative.

None of these

Answer

Correct Answer: Linear.

Note: This Question is unanswered, help us to find answer for this one

81. A ____ exception occurs when code attempts to divide a number by zero.

Divide by Zero

Zero denominator

Zero error

Division Error

Answer

Correct Answer: Divide by Zero

Note: This Question is unanswered, help us to find answer for this one

82. A ____ defines the name and data type of program variables.

Code

System Developers

Data declaration

Native applications

Answer

Correct Answer: Data declaration

Note: This Question is unanswered, help us to find answer for this one

83. The value of the expression 17 % 7 is ____.

Answer

Correct Answer: 4

Note: This Question is unanswered, help us to find answer for this one

84. The __________ function returns the smallest integer that is greater than or equal to the number.

Sqrt

Flow

Floor

Cell

Answer

Correct Answer: Cell

Note: This Question is unanswered, help us to find answer for this one

85. A subscript is a(n) _____.

Element in an array

Alternate name for an array

Number that represents the highest value stored within an array

Number that indicates the position of an array element

Answer

Correct Answer: Number that indicates the position of an array element

Note: This Question is unanswered, help us to find answer for this one

86. The ________ function concatenates the contents of one c-string with another c-string.

Strcopy

Strappend

Strcat

Stradd

None of these

Answer

Correct Answer: Strcat

Note: This Question is unanswered, help us to find answer for this one

87. Data that is sorted in ascending order is ordered ________.

From lowest to highest value

From highest to lowest value

Always with a binary sort algorithm

Always with a linear sort algorithm

None of these

Answer

Correct Answer: From lowest to highest value

Note: This Question is unanswered, help us to find answer for this one

88. To arrange the elements in an array in ascending order, you use the ____ method.

Array.Arrange

Array.Ascending

Array.Sort

Array.Arrange

Answer

Correct Answer: Array.Sort

Note: This Question is unanswered, help us to find answer for this one

89. The maximum number of entry points that any programming structure can have is ____.

Five.

Zero

One.

Three

Answer

Correct Answer: One.

Note: This Question is unanswered, help us to find answer for this one

90. The function eof is a member of the data type ____________________.

Istream

Unsigned

Cstdlib

None of these

Answer

Correct Answer: Istream

Note: This Question is unanswered, help us to find answer for this one

91. The standard header file for the abs(x)function is ____.

Answer

Correct Answer:

Note: This Question is unanswered, help us to find answer for this one

92. Before using the data type string, the program must include the header file ____.

Enum

Iostream

String

Std

Answer

Correct Answer: String

Note: This Question is unanswered, help us to find answer for this one

93. C++ provides a header file called ____________________, which is used for file i/o.

Fstream

Nested

Classes

None of these

Answer

Correct Answer: Fstream

Note: This Question is unanswered, help us to find answer for this one

94. The header file is also known as the ____________________.

Interface file

Private

Public

None of these

Answer

Correct Answer: Interface file

Note: This Question is unanswered, help us to find answer for this one

95. To use the strlen function in a program, you must also write #include ________.

None of these

Answer

Correct Answer:

Note: This Question is unanswered, help us to find answer for this one

96. If you try to add a new item to a full stack, the resulting condition is called a(n) ____.

Overflow

Simulation error

Underflow

Circular condition

Answer

Correct Answer: Overflow

Note: This Question is unanswered, help us to find answer for this one

97. A function prototype is ____.

A definition, but not a declaration

A declaration and a definition

A declaration, but not a definition

A comment line

Answer

Correct Answer: A declaration, but not a definition

Note: This Question is unanswered, help us to find answer for this one

98. To correctly swap two values, you create a(n) ____ variable to hold one of the values.

Per-swap

Inversion

Conversion

Temporary

Answer

Correct Answer: Temporary

Note: This Question is unanswered, help us to find answer for this one

99. An array name and index are separated using ____.

Curly brackets.

Square brackets.

A dot.

A comma

Answer

Correct Answer: Square brackets.

Note: This Question is unanswered, help us to find answer for this one

100. A(n) search is more efficient than a(n) search

Character, string.

Integer, double.

Binary, linear.

Linear, binary

Answer

Correct Answer: Binary, linear.

Note: This Question is unanswered, help us to find answer for this one

101. You may use a pointer to a structure as a ________.

Function parameter.

Structure member.

Function return type.

All of these.

None of these

Answer

Correct Answer: All of these.

Note: This Question is unanswered, help us to find answer for this one

102. The \ operator is the arithmetic operator for ____ division.

Integer

Decimal

Modular

Linear

Answer

Correct Answer: Integer

Note: This Question is unanswered, help us to find answer for this one

103. The percent sign is the ____ operator.

Remainder

Remaining

Percentage

Integer division

Answer

Correct Answer: Remainder

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104. You can use either a(n) ___ variable or a bool variable to store the value of a logical expression.

Int

Integral

(cin)

Equality

Answer

Correct Answer: Int

Note: This Question is unanswered, help us to find answer for this one

105. Pseudocode uses the end-structure statement ____ to clearly show where the structure ends.

End

Endstructure

Endloop

Endif

Answer

Correct Answer: Endif

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106. If a recursive function does not contain a base case, it ________.

Reaches the recursive case and stops

Returns false and stops

Returns 0 and stops

Uses up all available stack memory, causing the program to crash

None of these

Answer

Correct Answer: Uses up all available stack memory, causing the program to crash

Note: This Question is unanswered, help us to find answer for this one

107. You must have a(n) ________ for every variable you include in a program.

Comment

Definition

Output statement

Purpose

Numeric value

Answer

Correct Answer: Definition

Note: This Question is unanswered, help us to find answer for this one

108. You may define a(n) ________ in the initialization expression of a for loop.

Constant

Function

Variable

New data type

None of these

Answer

Correct Answer: Variable

Note: This Question is unanswered, help us to find answer for this one

109. Writing a program in a language such as c++ or java is known as _______ the program.

Translating

Interpreting

Coding

Compiling

Answer

Correct Answer: Coding

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110. The constructor function's return type is ________.

Int

Float

Char

Structure pointer

None of these

Answer

Correct Answer: None of these

Note: This Question is unanswered, help us to find answer for this one

111. The sort usually performs more exchanges than the sort.

Bubble, selection

Binary, linear

Selection, bubble

ANSI, ASCII

None of these

Answer

Correct Answer: Selection, bubble

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112. The ________ of a variable is limited to the block in which it is declared.

Precedence

Associativity

Scope

Branching ability

Answer

Correct Answer: Scope

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113. Regardless of the algorithm being used, a search through an array is always performed ________.

From lowest to highest element

From highest to lowest element

Beginning with the middle element

Using a binary search

None of these

Answer

Correct Answer: None of these

Note: This Question is unanswered, help us to find answer for this one

114. A(n) ________ search uses a loop to sequentially step through an array.

Binary.

Unary.

Linear.

Relative.

None of these

Answer

Correct Answer: Linear.

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115. A sorting algorithm can be used to arrange a set of in order.

Strings, ascending

Numeric values, descending

Numeric values, ascending

Strings, descending

All of the above

Answer

Correct Answer: All of the above

Note: This Question is unanswered, help us to find answer for this one

116. A ________ file is like a stream of data that must be read from its beginning to its end.

Direct access

Sequential access

Direct format

Binary format

Answer

Correct Answer: Sequential access

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117. ________ functions are dynamically bound by the compiler.

Constructor.

Destructor.

Static.

Virtual.

None of these

Answer

Correct Answer: Virtual.

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118. Dividing a problem into smaller subproblems is called ____ design

OOD

Top-down refinement

Structured

Analog

Answer

Correct Answer: Structured

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119. Popping an element from an empty stack is called ____.

Overflow

Underflow

Exception

Overloading

Answer

Correct Answer: Underflow

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120. You may define a __________ in the initialization expression of a for loop.

Constant.

Function.

Variable.

New data type.

None of these

Answer

Correct Answer: Variable.

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121. You can assign the value of one struct variable to another struct variable of ____ type.

A simple data

The same

An array

Any

Answer

Correct Answer: The same

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122. When a copy of a variable is sent to a method, it is passed by ____.

Value

Signature

Void

None of these

Answer

Correct Answer: Value

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123. To use the assert function in your program, you should include the statement ____.

#include

Answer

Correct Answer: #include

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124. To compare struct variables, you compare them ____.

By value

By reference

Index-wise

Member-wise

Answer

Correct Answer: Member-wise

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125. The memory allocated for a float value is ____ bytes.

Two

Four

Eight

Sixteen

Answer

Correct Answer: Four

Note: This Question is unanswered, help us to find answer for this one

126. String constants and _____ refer to the same concept.

Be descriptive

HardDriveSize

String literals

Answer

Correct Answer: String literals

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127. A(n) ____ is a numeric variable used for adding together something.

Incrementer

Updater

Counter

Accumulator

Answer

Correct Answer: Accumulator

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128. A _ is a member function that is automatically called when a class object is _.

Destructor, created

Constructor, created

Static function, deallocated

Utility function, declared

None of these

Answer

Correct Answer: Constructor, created

Note: This Question is unanswered, help us to find answer for this one

129. A ________ value in a loop can be either a positive or a negative number.

Step

Validate

Initialized

Indent

Answer

Correct Answer: Step

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130. ________ functions may have the same name, as long as their parameter lists are different.

Only two

Two or more

Zero

Un-prototyped

Answer

Correct Answer: Two or more

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131. ____ are arrays that have more than one dimension.

Multidimensional arrays

Arrays

Multidimensional

None of these

Answer

Correct Answer: Multidimensional arrays

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132. C++ requires that a copy constructor's parameter be a(n) ________.

Integer data type

Floating point data type

Pointer variable

Reference object

Answer

Correct Answer: Reference object

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133. ____ are executable statements that inform the user what to do.

Variables

Promp Lines

Expressions

Named Constants

Answer

Correct Answer: Promp Lines

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134. In c++, the dot is an operator called the ____ operator.

Dot access

Member access

Data access

Member

Answer

Correct Answer: Member access

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135. To test whether a character is a numeric digit character, use the ________ function.

Isnumber

NotAlpha

Isnumeric

Isdigit

Answer

Correct Answer: Isdigit

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136. The scope of a namespace member is local to the ____.

Function

Block

File

Namespace

Answer

Correct Answer: Namespace

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137. The name of the function to overload the operator <= is ____.

Overload<=

<=new

Operator<=

<=operator

Answer

Correct Answer: <=operator

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138. The first step in using the string class is to #include the ________ header file.

Iostream.

Cctype.

Cmath.

String

Answer

Correct Answer: String

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139. The _____ of an identifier refers to where in the program an identifier is accessible.

Driver

Reference

Scope

None of these

Answer

Correct Answer: Scope

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140. In the swap module, the third variable is declared as a ________ variable.

Special

Local

Both a and b

None of these

Answer

Correct Answer: Local

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141. Arrays may be at the time they are .

Initialized, declared

Declared ;initialized

Both of above

None of these

Answer

Correct Answer: Initialized, declared

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142. A(n) ________ operator can work with programmer-defined data types.

Inline

Unconditional

Overloaded

Undefined

Answer

Correct Answer: Overloaded

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143. A(n) ________ informs the compiler that a class will be declared later in the program.

Static function

Private data member

Forward declaration

Object conversion

Answer

Correct Answer: Forward declaration

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144. A file must be ________ before data can be written to or read from it.

Closed

Opened

Buffered

Initialized

Answer

Correct Answer: Opened

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145. To use files in a c++ program you must include the ________ header file.

File

Iostream

Fstream

Both A and B

Answer

Correct Answer: Fstream

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146. The conditional operator ?: takes ____ arguments.

Two

Four

Three

Five

Answer

Correct Answer: Three

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147. The following statement ________. int *ptr = new int;

A valid address in the computer's memory

The memory address of the variable named num1

Assigns an address to the variable ptr

Implicit array sizing

Answer

Correct Answer: Assigns an address to the variable ptr

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148. With pointer variables, you can __________ manipulate data stored in other variables.

Never

Seldom

Indirectly

All of these

Answer

Correct Answer: Indirectly

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149. When you work with a dereferenced pointer, you are actually working with ________.

A variable whose memory has been allocated

A copy of the value pointed to by the pointer variable

The actual value of the variable whose address is stored in the pointer variable

All of these

Answer

Correct Answer: The actual value of the variable whose address is stored in the pointer variable

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150. When you dereference an object pointer, use the ________.

-> operator

<> operator

Dot operator

& operator

Answer

Correct Answer: -> operator

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151. When one control statement is located within another, it is said to be ____.

Closed

Nested

Compound

Blocked

Answer

Correct Answer: Nested

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152. The value of the expression 33/10, assuming both values are integral data types, is ____.

0.3

3.0

3.3

Answer

Correct Answer: 3

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153. The primary outcome of the systems analysis phase is ____.

A prioritized list of system requirements

Data models needed to build the new system

Case diagrams to be used in system design

Identified sources of data for the new system

Answer

Correct Answer: A prioritized list of system requirements

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154. The constructor is called before the constructor.

Base, derived

Derived, base

Public, private

Private, public

Answer

Correct Answer: Base, derived

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155. Manipulators without parameters are part of the ____ header file.

Iostream

Ifstream

Iomanip

Pmanip

Answer

Correct Answer: Iostream

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156. In an adt the implementation details are ________ the interface through which a program uses it.

Used by

Determined by

A part of

Kept separate from

Answer

Correct Answer: Kept separate from

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157. In a ____ copy, two or more pointers have their own data.

Shallow

Deep

Static

Dynamic

Answer

Correct Answer: Deep

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158. If you leave out the size declarator in an array declaration ________.

The correct answer is: several identical arrays

The correct answer is: constant integer expression, zero

The correct answer is: a loop to assign the elements of one array to the other array

The correct answer is: you must furnish an initialization list

Answer

Correct Answer: The correct answer is: you must furnish an initialization list

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159. An array created during the execution of a program is called a(n) ____ array.

Int

Pointer

Shallow

True

Dynamic

Answer

Correct Answer: Dynamic

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160. A(n) ____ is a programmer-defined type, such as a class.

Inheritance

Numeric data type

Primitive data type

Abstract data type

Answer

Correct Answer: Abstract data type

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161. A two-dimensional array is like ______________ put together.

An array and a function.

Several identical arrays.

Two functions.

Two arrays of

Answer

Correct Answer: Several identical arrays.

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162. A loop that continues to execute endlessly is called a(n) ____ loop.

End

Infinite

Unhinged

Definite

Answer

Correct Answer: Infinite

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163. A class is a(n) ________ that is defined by the programmer.

Data type

Function

Method

Attribute

None of these

Answer

Correct Answer: Data type

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164. ____ loops are called posttest loops.

Forloop

Do...while loop

While loop

Answer

Correct Answer: Do...while loop

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165. The expression static_cast(6.9) + static_cast(7.9) evaluates to ____.

14.8

Answer

Correct Answer: 13

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166. A(n) ____ consists of data and the operations on those data.

Disk

Interpreter

Compiler

Object

Answer

Correct Answer: Object

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167. The value in a(n) ________ variable persists between function calls.

Default

Header

Persist

Prototype

Static

Answer

Correct Answer: Static

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168. Use the delete operator only on pointers that were ________.

Never used

Not correctly initialized

Created with the new operator

Dereferenced inappropriately

Answer

Correct Answer: Created with the new operator

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169. The programming language c++ evolved from ____.

Bit

CPU

Applicaiton

Answer

Correct Answer: C

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170. To pass an array as an argument to a function, pass the _________ of the array.

Contents

Size, expressed as an integer

Name

Value of the first element

None of these

Answer

Correct Answer: Name

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171. To access an array element, use the array name and the element's ________.

Data type

Subscript

Name

Value

None of these

Answer

Correct Answer: Subscript

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172. The std::endl stream manipulator________.

Inputs a newline

Flushes the output buffer

Outputs a newline and flushes the output buffer

Terminates the program

Answer

Correct Answer: Outputs a newline and flushes the output buffer

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173. The statements that may generate an exception are placed in a ____ block.

Throw

Finally

Try

Catch

Answer

Correct Answer: Try

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174. The statement: return 8, 10; returns the value ____.

Answer

Correct Answer: 10

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175. The ideal type of loop to use if you want a user to enter exactly 20 values is a(n) ________ loop.

Do-while

For

False

Fstream

Answer

Correct Answer: For

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176. The heading of the function is also called the ____.

Title

Function signature

Function head

Function header

Answer

Correct Answer: Function header

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177. The expression x < y is called a(n) ________ expression.

Compare

Relational

False

Nested if

Answer

Correct Answer: Relational

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178. The do-while loop is a(n) loop, whereas the while loop is a(n) loop.

Post test, pretest

Loop control variable

As long as the condition is true

At least once

Answer

Correct Answer: Post test, pretest

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179. The destructor function's return type is ________.

Nothing. Destructors have no return type.

The class

Identify objects, then define objects' attributes, behaviors, and relationships

None of these

Answer

Correct Answer: Nothing. Destructors have no return type.

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180. The conditional and operator in java, c++, and c# is ____.

AND

Answer

Correct Answer: &&

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181. The components of a struct are called the ____ of the struct.

.(dot)

The same

Members

MemberName

Answer

Correct Answer: Members

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182. The compiler performs ________ on virtual functions.

Inheritance

Dynamic binding

Derived, base

None of the above

Answer

Correct Answer: Dynamic binding

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183. The compiler checks ________.

Syntax rule violations

Console.WriteLine(Good day!);

True

Translating high-level programming language into machine-readable form

Answer

Correct Answer: Syntax rule violations

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184. The code int *p; declares p to be a(n) ____ variable.

Static

Pointer

StudentPtr->gpa

Int

Answer

Correct Answer: Pointer

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185. The c++ function ____ calculates the largest whole number that is less than or equal to x.

Abs(x)

Floor(x)

None of these

Answer

Correct Answer: Floor(x)

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186. The c++ ________ operator represents logical and.

Answer

Correct Answer: &&

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187. The c-string company[12] can hold ________.

Eleven characters and the null terminator

Var1 storing the ASCII value of lower case 'a'.

Of any digits 0 through 9

Null character, or terminator

Answer

Correct Answer: Eleven characters and the null terminator

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188. The addition and deletion of elements of a stack occurs only at the ____ of the stack.

Head

Bottom

Top

Middle

Answer

Correct Answer: Top

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189. The >= is one of the __________ operators.

Relational operator

Arithmetic operator

Logical operator

Assignment operator

Answer

Correct Answer: Relational operator

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190. The -- operator ________.

Can be used in either prefix or postfix mode.

Is a unary operator.

Subtracts one from the value of its operand.

Must have an lvalue, such as a variable, as its operand.

All the above are true

Answer

Correct Answer: All the above are true

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191. The ________, also known as the address operator, returns the memory address of a variable.

Asterisk ( * )

Ampersand ( & )

Percent sign (%)

Exclamation point ( ! )

None of these

Answer

Correct Answer: Ampersand ( & )

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192. "the ________ operator is used in c++ to test for equality.

Flag

Answer

Correct Answer: ==

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193. The ________ of recursion is the number of times a recursive function calls itself.

Level

Breadth

Type

Depth

None of these

Answer

Correct Answer: Depth

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194. The ________ object enables a program to read data from the user.

Firefox.

Std::cin

Printer.

Int total

Answer

Correct Answer: Std::cin

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195. The ________ library function reverses the order of a character array.

Reversit

Reverstr

Strrev

Backward

None of the answers are correct

Answer

Correct Answer: None of the answers are correct

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196. The ________ is/are used to display information on the computer's screen.

Opening and closing braces

Opening and closing quotation marks

Cout object

Backslash

None of these

Answer

Correct Answer: Cout object

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197. The class constructor is called before the class constructor.

Derived, base

Virtual Function

Base, derived

Inheritance

Answer

Correct Answer: Base, derived

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198. The and operators can be used to increment or decrement a pointer variable.

Addition, subtraction

Modulus, division

++, --

All of these

None of these

Answer

Correct Answer: ++, --

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199. The ____ members of an object form its internal state.

Static

Protected

Private

Public

Answer

Correct Answer: Private

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200. When you derive a class from an existing class, you ________ add new data and functions.

False

Multiple inheritance

May

True

Answer

Correct Answer: May

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201. Polymorphism means ________.

That data fields should be declared private

That a class can contain another class

That a class can extend another class

That a variable of supertype can refer to a subtype object

Answer

Correct Answer: That a variable of supertype can refer to a subtype object

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202. Multiple inheritance is when a class has base classes.

Ambiguous

Derived, two or more

Private members

Multiple inheritance

Answer

Correct Answer: Derived, two or more

Note: This Question is unanswered, help us to find answer for this one

203. Main memory is called ____.

True

Random access memory

Gigabyte

Applicaiton

Answer

Correct Answer: Random access memory

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204. Main memory is an ordered sequence of items, called ____.

True

Memory cells

Random access memory

Digital signals

Answer

Correct Answer: Memory cells

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205. Inheritance is an example of a(n) ____ relationship.

Single

Ostream

Base

Is-a

Answer

Correct Answer: Is-a

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206. In memory, c++ automatically places a ________ at the end of string literals.

Semicolon

Quotation marks

Null terminator

Newline escape sequence

Answer

Correct Answer: Null terminator

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207. In c++, virtual functions are declared using the reserved word ____.

False, they are declared using

False.

False, it is ->

False, only p is the ptr var

Answer

Correct Answer: False, they are declared using

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208. In c++, the scope resolution operator is ____.

True

False

Typedef

Answer

Correct Answer: ::

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209. In c++, the null character is represented as ____.

'\0'

"\0"

'0'

"0"

Answer

Correct Answer: '\0'

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210. In c++, the ____ symbol is an operator, called the member access operator.

.(dot)

.memberName

C. the same

Members

Answer

Correct Answer: .(dot)

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211. In c++, ____ is called the address of operator.

& or ampersand

Virtual

False, it is ->

Destructor

Answer

Correct Answer: & or ampersand

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212. In c++, ____ is a reserved word.

Deftype

Typedef

Typecc

Alias

Answer

Correct Answer: Typedef

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213. In any program that uses the cin object, you must include the ________.

Compiler

Iostream header file

Linker

>> and << operators

None of the above

Answer

Correct Answer: Iostream header file

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214. In a(n) ____ copy, two or more pointers have their own data.

Deep

Delete

Shallow

New

Answer

Correct Answer: Deep

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215. In a sequence of try/catch blocks, the last catch block of that sequence should be ____.

Class myClass {};

Catch(...){ }

#include

Stdexcept

Answer

Correct Answer: Catch(...){ }

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216. In ____ binding, the necessary code to call a specific function is generated by the compiler.

Int

Static

Dynamic

Pointer

Answer

Correct Answer: Static

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217. If a while loop has no braces around the body of the loop ________.

Pretest, posttest

Marks the end of a list of values.

The loop body contains just one statement.

Repeated as long as the condition is true

Answer

Correct Answer: The loop body contains just one statement.

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218. If a member of a class is ____, you cannot access it outside the class.

Automatic

Private

Static

Public

Answer

Correct Answer: Private

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219. Given the statement double *p;, the statement p++; will increment the value of p by ____ byte(s).

8 bytes

4 bytes

2 bytes

Answer

Correct Answer: 8 bytes

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220. Class templates are called ____ types.

Structured

Parameterized

Member

Polymorphic

Answer

Correct Answer: Parameterized

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221. C++ automatically places ________ at the end of a string constant (string literal).

Semicolon

Quotation marks

Null terminator

Newline escape sequence

None of these

Answer

Correct Answer: Null terminator

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222. C++ allows you to redefine the way ________ work when used with class objects.

Compiler errors

Preprocessor directives

Standard operators

Undefined variables

None of these

Answer

Correct Answer: Standard operators

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223. Before a structure variable can be created, the structure must be _________.

False, it can

Declared

Members

True

Answer

Correct Answer: Declared

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224. Arrays must be at the time they are .

Sized, executed

Re-scoped, deleted

Initialized, declared

Compiled, typed

Answer

Correct Answer: Initialized, declared

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225. Array subscripts are always a sequence of ____.

Integers

Strings

Floating points

None of these

Answer

Correct Answer: Integers

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226. Array elements must be ________ before a binary search can be performed.

Summed

Set to zero

Sorted

Positive numbers

None of these

Answer

Correct Answer: Sorted

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227. Arguments are passed to the base class destructor function by the class function.

Derived, constructor

Derived, destructor

Base, constructor

Base, destructor

None of these

Answer

Correct Answer: None of these

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228. An operation that copies a value into a variable is called a(n) ________ operation.

Assignment

Equals

Copy

Declaration

Answer

Correct Answer: Assignment

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229. A structure ________ contain members of the same data type.

Cannot

Can

Shouldn't

None of these

Answer

Correct Answer: Can

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230. A struct variable can be passed as a parameter ____.

The values and the length

Either by value or by reference

Heterogeneous

Before the definitions of all the functions

Answer

Correct Answer: Either by value or by reference

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231. A stack can be implemented as either a(n) ____ or a linked structure.

Derived

True

Array

Nodes

Answer

Correct Answer: Array

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232. A program that tests a function is called a _____ program.

Reference

Driver

Scope

Value

Answer

Correct Answer: Driver

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233. A program called a(n) ____ combines the object program with the programs from libraries.

Loader

Syntax

Linker

Compiler

Answer

Correct Answer: Linker

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234. A function ____________________ is a function that is not fully coded.

Stub

False

True

Scope

Answer

Correct Answer: Stub

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235. A function ________ return a structure.

May

May not

Will always

Cannot possibly

None of these

Answer

Correct Answer: May

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236. A function ________ is a statement that causes a function to execute.

For loop

Do-while loop

Function prototype

Function call

None of these

Answer

Correct Answer: Function call

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237. A function ________ contains the statements that make up the function.

Definition

Prototype

Call

Expression

Parameter list

Answer

Correct Answer: Definition

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238. A destructor has the character ____, followed by the name of the class.

Answer

Correct Answer: ~

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239. A class ____ automatically executes whenever a class object goes out of scope.

Constructor

Destructor

Pointer

Exception

Answer

Correct Answer: Destructor

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240. A catch block can have, at most, ____ catch block parameter(s).

Zero

One

Two

Three

Answer

Correct Answer: One

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241. ________ must be included in any program that uses the cout object.

The beginning of a comment

The header file iostream

Floating point data types

Integer and Floating Point

Answer

Correct Answer: The header file iostream

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242. ________ are c++ operators that change their operands by one.

+ and -

++ and --

Binary and unary

Arithmetic and relational

Conditional and relational

Answer

Correct Answer: ++ and --

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243. ____ consists of 65,536 characters.

ASCII-8

ASCII

Unicode

EBCDIC

Answer

Correct Answer: Unicode

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244. Subscript numbering in c++________.

Begins with zero

Begins with one

May b 0 or 1

None of these

Answer

Correct Answer: Begins with zero

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245. Every complete c++ program must have a __________.

Symbolic constant

Cout statement

Comment

Function named main

Answer

Correct Answer: Function named main

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246. An element of a two-dimensional array is referred to by followed by .

The array name, the column number of element

The row subscript of the element, the column subscript of the element

A comma, a semicolon

The row subscript of element, the array name

None of these

Answer

Correct Answer: The row subscript of the element, the column subscript of the element

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247. An array with no elements is ________.

Legal in C++

Illegal in C++

Automatically furnished one element, with a value of zero

Automatically furnished one value—the null terminator

None of these

Answer

Correct Answer: Illegal in C++

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248. A(n) ________ can be used to specify the starting values of an array.

Initialization list

Null terminator

Legal in C++

Implicit array sizing

Answer

Correct Answer: Initialization list

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249. A function can have zero to many parameters, and it can have ________ return value(s).

Only 2

Many

Only 1

No return

Answer

Correct Answer: Only 1

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250. A class may have default constructor(s) and destructor(s).

More than one, more than one

Only one, only one

Only one, more than one

No, only one

More than one, only one

Answer

Correct Answer: Only one, only one

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251. A binary search begins with the ________ element of an array.

Middle

Start

End

Every

Answer

Correct Answer: Middle

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252. ________ member function may be called by a statement in a function that is outside the class.

Public

Private

GlobalNone of these

Answer

Correct Answer: Public

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253. ____ is a valid char value.

'A'

'1'

Answer

Correct Answer: 'A'

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254. ____ is a parameterized stream manipulator.

Semantic

Section 5

setfill

Classes

Answer

Correct Answer: setfill

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255. Which of the following will compile, link and run OK in C++? (Choose all that apply.)

class Upwork { public: Upwork(const char*){} explicit Upwork(long){} }; void f(Upwork) {} int main() { Upworkupw = "Upwork"; f("Upwork"); }

class Upwork { public: Upwork(const char*){} explicit Upwork(long){} }; void f(Upwork) {} int main() { Upworkupw = 1+2; f(1+2); }

class Upwork { public: Upwork(const char*){} explicit Upwork(long){} }; void f(Upwork) {} int main() { Upworkupw(1+2); f(upw); }

class Upwork { public: Upwork(const char*); explicit Upwork(long); }; void f(Upwork) {} int main() { Upworkupw = "Upwork"; f("Upwork"); }

class Upwork { public: Upwork(const char*); explicit Upwork(long); }; void ::f(Upwork) {} int main() { Upworkupw = "Upwork"; f("Upwork"); }

Answer

Correct Answer: class Upwork { public: Upwork(const char*){} explicit Upwork(long){} }; void f(Upwork) {} int main() { Upworkupw = "Upwork"; f("Upwork"); }
class Upwork { public: Upwork(const char*){} explicit Upwork(long){} }; void f(Upwork) {} int main() { Upworkupw(1+2); f(upw); }
class Upwork { public: Upwork(const char*); explicit Upwork(long); }; void f(Upwork) {} int main() { Upworkupw = "Upwork"; f("Upwork"); }
class Upwork { public: Upwork(const char*); explicit Upwork(long); }; void ::f(Upwork) {} int main() { Upworkupw = "Upwork"; f("Upwork"); }

Note: This question has more than 1 correct answers

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256.
Which function cannot be overloaded?

Member Function

Static Function

Virtual Function

None of the above.

Answer

Correct Answer: Virtual Function

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257.
Destructor calls are made in which order of the corresponding constructor calls?

Same order.

Reverse order.

Depends on how the object was constructed.

None of the above.

Answer

Correct Answer: Reverse order.

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258.
Which of the following is used to create an object by initializing it with an object of the same class that has been created previously?

Destructor

Constructor

Copy Destructor

Copy Constructor

Default Destructor

Default Constructor

Answer

Correct Answer: Copy Constructor

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259.
Which of the following is NOT provided by the compiler by default?

Zero-argument constructor

Destructor

Copy constructor

Copy destructor

Answer

Correct Answer: Copy destructor

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260.
What is the output of the following code? #include using namespace std; void func(int x) { cout << x ; } int main(int argc, const char * argv[]) { void (n)(int); n = &func; (n)( 5 ); n( 8 ); return 0; }

Answer

Correct Answer: 58

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261.
What is the output of the following code? #include using namespace std; struct val { int a; char b; }; int main(int argc, const char * argv[]) { struct val s ={19,49}; struct val ps =(struct val )&s; cout << ps->a << ps->b; return 0; }

191

195

196

197

Answer

Correct Answer: 191

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262.
An operator '____' will allow you to delete memory allocated as an array which will ensure that every object in the array will receive a destructor call.

destructor

delete

delete[]

kill[]

free[]

nuke[]

Answer

Correct Answer: delete[]

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263.
C++ provides the ability to define _ and ___ as its primary encapsulation mechanisms.

Classes, functions

Classes, object

Classes, variable

Classes, instance

Answer

Correct Answer: Classes, functions

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264.
How many members does the below Freelancer class have? class Upwork { public: int freelancers; int jobs; int projects; private: double income; double costs; }; struct World { int inhabitants; double gdp; int countries; }; class Project { public: char* client; char* title; double hours; double rate; private: char* dialog; char* ip; }; class Freelancer : Upwork, World, Project { private: char* name; };

Answer

Correct Answer: 11

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265.
How can you declare a template?

temp

tem

template<>

None of the above.

Answer

Correct Answer: template<>

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266.
When arguments are passed to a destructor it is call a '___' error.

Logical

Virtual

Runtime

Syntax

Linker

Answer

Correct Answer: Syntax

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267.
Which function prototype is VALID? (Choose all that apply)

int UpWork(int job = project());

float UpWork(int job = project(int, float));

float = project(int, float) UpWork(job);

Answer

Correct Answer: int UpWork(int job = project());

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268.
Which of the following statement is correct?

The default value for an argument cannot be function call.

C++ allows the redefinition of a default parameter.

Both of the above

C++ does not allow the redefinition of a default parameter.

Answer

Correct Answer: The default value for an argument cannot be function call.

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269.
How to make the C/C++ source can be built for any architecture,select proper answer?

Write architecture dependent codes as individual files and write build script to build the proper source code for each architecture like below. Test_x86.c, Test_x64.c… => Build each file as the architectural requirement.

Use #ifdef/#endif macros within the source code like below #if defined(__i386__) // do something for 32bit ARCH #elif defined(__x86_64__) // do something for 64bit ARCH #endif

C/C++ source code doesn’t need to be built for a specific architecture, because it supports source-level compatibility for any architecture

Answer

Correct Answer: Use #ifdef/#endif macros within the source code like below #if defined(__i386__) // do something for 32bit ARCH #elif defined(__x86_64__) // do something for 64bit ARCH #endif

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270.
Study below codes and select proper answer? ifdef defined(__x86_64__) static inline unsigned long long rdtsc(void) { unsigned hi, lo; asm volatile ("rdtsc" : "=a"(lo), "=d"(hi)); return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 ); } elif defined(powerpc) static inline unsigned long long rdtsc(void) { unsigned long long int result=0; unsigned long int upper, lower,tmp; asm volatile( "0: \n" "\tmftbu %0 \n" "\tmftb %1 \n" "\tmftbu %2 \n" "\tcmpw %2,%0 \n" "\tbne 0b \n" : "=r"(upper),"=r"(lower),"=r"(tmp) ); result = upper; result = result<<32; result = result|lower; return(result); } endif

Used inline assembly to get a certain memory value for x64 and PowerPC architecture

Get current CPU clock counter value and returns for x64 and PowerPC architecture

Read rdtsc register value for x86 and RAM data from address 0 for PowerPC architecture

Answer

Correct Answer: Read rdtsc register value for x86 and RAM data from address 0 for PowerPC architecture

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271.
Which of the following statement is correct?

Once a reference variable has been defined to refer to a particular variable it can refer to any other variable.

A reference is indicated by using && operator.

Once a reference variable has been defined to refer to a particular variable it cannot refer to any other variable.

A reference can be declared beforehand and initialized later.

Answer

Correct Answer: Once a reference variable has been defined to refer to a particular variable it cannot refer to any other variable.

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272.
Which of the following statement is correct?

Overloaded functions can have at most one default argument.

An overloaded function cannot have default argument.

All arguments of an overloaded function can be default.

A function if overloaded more than once cannot have default argument.

Answer

Correct Answer: All arguments of an overloaded function can be default.

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273.
How many types of templates are there in C++?

Answer

Correct Answer: 2

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274.
Point out proper answer about the difference between below source codes for the execution of external commands if (fork() == 0) { execve(path, args, env); exit(1); } and FILE *fp = popen(path, “r”); if (fp) { pclose(fp); }

Same code to execute

Same but different as parameter passing

Execution context is different, one is executed within another thread and another is executed within the caller process

Same but different is related with the output from the execution result of

Answer

Correct Answer: Execution context is different, one is executed within another thread and another is executed within the caller process
Same but different is related with the output from the execution result of

Note: This question has more than 1 correct answers

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275.
Which of the following will compile, link and run OK in C++? (Choose all that apply.)

struct B{}; struct B1:B {}; struct B2:B{}; struct C{}; struct DD :B1, B2, private C{}; int main() { DD* p = new DD; }

struct B{}; struct B1:B {}; struct B2:B{}; struct C{}; struct DD :B1, B2, private C{}; int main() { DD* p = new DD; B1* pb = p; }

struct B{}; struct B1:B {}; struct B2:B{}; struct C{}; struct DD :B1, B2, private C{}; int main() { DD* p = new DD; B* pb = p; }

struct B{}; struct B1:B {}; struct B2:B{}; struct C{}; struct DD :B1, B2, private C{}; int main() { DD* p = new DD; C* pb = p; }

Answer

Correct Answer: struct B{}; struct B1:B {}; struct B2:B{}; struct C{}; struct DD :B1, B2, private C{}; int main() { DD* p = new DD; }
struct B{}; struct B1:B {}; struct B2:B{}; struct C{}; struct DD :B1, B2, private C{}; int main() { DD* p = new DD; B1* pb = p; }

Note: This question has more than 1 correct answers

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276.
What is the maximum number of elements that can be added to a linked list?

There is no fixed maximum limit.

It depends on how much memory is available.

Answer

Correct Answer: 10

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277.
Which of the following statements are correct? Check all that apply.

The stdio.h header defines variable types, macros, and functions for performing input and output.

The signal.h header defines a variable type, macros and functions to handle different signals reported during a program's execution.

The stdlib.h header defines variable types, macros, and functions for performing general functions.

The locale.h header defines the language specific settings.

Answer

Correct Answer: The stdio.h header defines variable types, macros, and functions for performing input and output.
The stdlib.h header defines variable types, macros, and functions for performing general functions.

Note: This question has more than 1 correct answers

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278.
27- Does an exception have to be caught in the same place where the try block created the exception?

Yes

it is possible to catch an exception anywhere in the call stack

Answer

Correct Answer: No
it is possible to catch an exception anywhere in the call stack

Note: This question has more than 1 correct answers

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279.
Which of the following are valid declarations or definitions of a pointer?

int* p1 = 0;

int* p2 = 2-2;

int* p3 = 1;

int z = 0; int* p4 = z;

int* p5 = null;

int* p6 = new int;

Answer

Correct Answer: int* p1 = 0;
int* p2 = 2-2;
int* p6 = new int;

Note: This question has more than 1 correct answers

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280.
Which of the following statements are true about conversions in C++? (Choose all that apply.)

An enumeration can be converted to an integer type.

Bool and char are integer types.

Any pointer to an object type can be implicitly converted to a void*.

Pointers, integers and floating-point values can be implicitly converted to bool.

When a floating-point is converted to an integer value, the fractional part is discarded.

Conversions from integer to floating types are as mathematically correct as the hardware allows.

Answer

Correct Answer: Any pointer to an object type can be implicitly converted to a void*.
When a floating-point is converted to an integer value, the fractional part is discarded.
Conversions from integer to floating types are as mathematically correct as the hardware allows.

Note: This question has more than 1 correct answers

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281.
Code will exhibit undefined behavio

What will be the result of calling the h() function in the following C++ code? const char* upwork[] = { "Freelancers", "Projects", "Fixed", "Hourly" } const char* f(inti) { return upwork[i]; } void g(string s){} void h() { const string& r = f(0); g(f(1)); string s = f(2); cout<< "f(3): " << f(3) << " s: " << s << " r: " << r << '\n'; }

f(3): F s: P r: F

f(3): F s: F r: H

f(3): Freelancers s: Fixed r: Hourly

f(3): Hourly s: Fixed r: Freelancers

f(3): Hourly s: F r: Freelancers

Answer

Correct Answer: f(3): Hourly s: Fixed r: Freelancers

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282.
Consider the following code: template<class T> void Kill(T &objPtr) { delete

objPtr; objPtr = NULL; } class MyClass { }; void Test() { MyClass ptr = new MyClass();

Kill(ptr); Kill(ptr); } Invoking Test() will cause which of the following?

Code will Crash or Throw and Exception

Code will Execute, but there will be a memory leak

Code will execute properly

Code will exhibit undefined behavio

Answer

Correct Answer: Code will execute properly

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283.
Cannot read /proc//mem file even with root privilege due to permission error. How to solve it? intmem_file = open(“/proc/12345/mem”, O_RDONLY); // returns permission error

Have to use ptrace() like below ptrace(PTRACE_ATTACH, 12345, NULL, NULL); waitpid(pid, NULL, 0); intmem_file = open(“/proc/12345/mem”, O_RDONLY); … close(mem_file);

ptrace(PTRACE_DETACH, 12345, NULL, NULL);

Have to send SIGSTOP/SIGCONT like below Kill(12345, SIGSTOP) intmem_file = open(“/proc/12345/mem”, O_RDONLY); … close(mem_file); kill(12345, SIGCONT);

Check executable file’s attribute and remove immutable profile It didn’t work at root privilege. Must check user mode and set permission

Answer

Correct Answer: Have to send SIGSTOP/SIGCONT like below Kill(12345, SIGSTOP) intmem_file = open(“/proc/12345/mem”, O_RDONLY); … close(mem_file); kill(12345, SIGCONT);

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284.
Which of the following is the correct way to declare a function as constant?

intshowData(void) const { }

funcshowData(void) const { }

constintshowData(void) { }

funcconstshowData(void) { }

Answer

Correct Answer: funcshowData(void) const { }

Note: This Question is unanswered, help us to find answer for this one

285.
Which of the following is the better way to implement mathematical matrix operation such as plus, minus and multiply with C++? A- Define matrix operation functions like below. Matrix Matrix :: pls(Matrix mat1, Matrix mat2); Matrix Matrix :: min(Matrix mat1, Matrix mat2); Matrix Matrix :: mlt(Matrix mat1, Matrix mat2); B- Override operators like below Matrix Matrix :: operator +(Matrix m2) Matrix Matrix :: operator -(Matrix m2) Matrix Matrix :: operator *(Matrix m2)

A and B, both are same

Answer

Correct Answer: B

Note: This Question is unanswered, help us to find answer for this one

286.
Reference is like a ____.

Pointer

Structure

Macro

Enum

Answer

Correct Answer: Pointer

Note: This Question is unanswered, help us to find answer for this one

287.
What is the value of a following the below sequence of C++ statements? int a = 7; int& r = a; r = 8;

NULL

It is undefined.

It is uninitialized.

Answer

Correct Answer: 8

Note: This Question is unanswered, help us to find answer for this one

288.
Consider the following C++ definition: int* x = 0; Which of the following expressions refers to the location of the variable x in memory?

&&x

**x

&x*

Answer

Correct Answer: &x

Note: This Question is unanswered, help us to find answer for this one

289.
What does the following code? while (numforks<maxf) { pid_tpid = fork(); if (pid == 0) { //do something exit(1); } else { numforks++; } while (numforks>= maxf) { wait(NULL); numforks--; } }

Create process execution pool in the parent process’s context and keep maxf maximum processes

Creates Maximum maxf child processes

Creates Maximum maxf child processes and wait until they are finished

last while (numforks>= maxf) loop is useless for the multiple processes’ execution

Answer

Correct Answer: Creates Maximum maxf child processes and wait until they are finished

Note: This Question is unanswered, help us to find answer for this one

290.
Which operator is used to deallocate the memory?

destroy

free

empty

None of the above.

Answer

Correct Answer: None of the above.

Note: This Question is unanswered, help us to find answer for this one

291.
Which of the following you can use pass an array object to a function?

void SomeFunction(Array[int]&);

void SomeFunction(Array&);

void SomeFunction(Array &);

Answer

Correct Answer: void SomeFunction(Array&);

Note: This Question is unanswered, help us to find answer for this one

292.
union U { int x; double d; }; int main() { U a; a.x = 7; a.d = 7.7; int y = a.x; // <------ breakpoint placed here } What is the value held by a.x when the above breakpoint is reached?

uninitialized

7.7

14.7

Answer

Correct Answer: uninitialized

Note: This Question is unanswered, help us to find answer for this one

293.
When your program allocates memory on the free store, a _____ is returned?

delete

null

pointer

bool

Answer

Correct Answer: pointer

Note: This Question is unanswered, help us to find answer for this one

294.
What is the output of following code? #include <iostream> using namespace std; void Upwork(); int main() { try { Upwork(); } catch(double) { cerr<< "Projects" <<endl; } return 0; } void Upwork() { throw 3; }

"Projects" is output to the standard output.

The code does not compile.

Running the code gives an unhandled exception.

None of the above.

Answer

Correct Answer: Running the code gives an unhandled exception.

Note: This Question is unanswered, help us to find answer for this one

295.
How many members does the below Freelancer class has? class Upwork { public: int freelancers; int jobs; int projects; private: double income; double costs; }; struct World { int inhabitants; double gdp; int countries; }; class Project { public: char* client; char* title; double hours; double rate; private: char* dialog; char* ip; }; class Freelancer : Upwork, World, Project { private: char* name; };

Answer

Correct Answer: 15

Note: This Question is unanswered, help us to find answer for this one

296.
What will be the output of following program? #include <iostream> using namespace std; int main() { char* upwork; try { upwork = new char[1024]; if (upwork == 0) throw "Projects"; else cout<<sizeof(upwork) << "Freelancers"<<endl; } catch(char *strg) { cout<<"Feedback"<<strg<<endl; } return 0; }

Projects

Freelancers

Feedback

ProjectsFreelancersFeedback

It depends on the size of the data type.

Answer

Correct Answer: It depends on the size of the data type.

Note: This Question is unanswered, help us to find answer for this one

297.
What is a template?

A template is a formula for creating a generic class.

A template is used to manipulate the class.

A template is used for creating the attributes.

None of the above

Answer

Correct Answer: A template is a formula for creating a generic class.

Note: This Question is unanswered, help us to find answer for this one

298.
C++ ____ for local variables are called at the end of the object lifetime?

Destructors

Constructor

Pointer

Classes

Answer

Correct Answer: Classes

Note: This Question is unanswered, help us to find answer for this one

299.
What does the function objects implement?

operator

operator()

operand

None of the above.

Answer

Correct Answer: operator()

Note: This Question is unanswered, help us to find answer for this one

300.
Function overloading is an example of ___?

polymorphism

class

virtual

pointer

Answer

Correct Answer: polymorphism

Note: This Question is unanswered, help us to find answer for this one

301.
Compare below source codes and tell which one is better?

A) intscan_buffer(char buffer, intbuffer_size) { // serach malware patterns for(inti = 0; i< PATN_CNT; i++) { intlen = strlen(malware_pattern[i]); for (int j = 0; j <buffer_size - len; j++) { for (int k = 0; k <len; k++){ if ((char)buffer[j+k] != (char)malware_pattern[i][k]) break; } // found malware pattern if (k == len) return 1; } } return 0; } B) intscan_buffer(char buffer, intbuffer_size) { // serach malware patterns for(inti = 0; i< PATN_CNT; i++) { intlen = strlen(malware_pattern[i]); for (int j = 0; j <buffer_size - len; j++) { if (strstr(buffer, (void*) malware_pattern[i]) != NULL) { // found malware pattern return 1; } } } return 0; }

A) function is better

B) function is better

Same performance

Answer

Correct Answer: B) function is better

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302.
Which symbol is used to declare the preprocessor directives?

Answer

Correct Answer: #

Note: This Question is unanswered, help us to find answer for this one

303.
A reference is declared using ___ symbol?

Answer

Correct Answer: &

Note: This Question is unanswered, help us to find answer for this one

304.
Which of the following is a valid statement regarding cin.read()?

Reads n bytes (or until the end of the file) from the stream into the buffer.

Reads characters into the string buffer.

Puts the next input character in the variable.

Answer

Correct Answer: Reads n bytes (or until the end of the file) from the stream into the buffer.

Note: This Question is unanswered, help us to find answer for this one

305.
Functions can be declared to return a reference type. Which of the following are correct reasons to make such a declaration? (Choose all that apply)

The information being returned is a large enough object that returning a reference is more efficient than returning a copy.

The type of the function is an rvalue.

Answer

Correct Answer: The information being returned is a large enough object that returning a reference is more efficient than returning a copy.
The type of the function is an rvalue.

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

306.
A reference is stored on ___.

heap.

stack.

queue.

binary tree.

Answer

Correct Answer: stack.

Note: This Question is unanswered, help us to find answer for this one

307.
What is the output if following code executed? include using namespace std; namespace fun1 { int a = 6; } namespace fun2 { int a = 11; } int main(int argc, const char * argv[]) { int a = 10; fun1::a; fun2::a; cout << a; return 0; }

Answer

Correct Answer: 10

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308.
Which operator is used to resolve the scope of the global variable?

-->

Answer

Correct Answer: ::

Note: This Question is unanswered, help us to find answer for this one

309.
Which of the following statement is correct about the references?

A reference must always be initialized within functions.

A reference must always be initialized outside all functions.

A reference must always be initialized.

Answer

Correct Answer: A reference must always be initialized.

Note: This Question is unanswered, help us to find answer for this one

310.
How many adapters support the checked iterators?

Answer

Correct Answer: 2

Note: This Question is unanswered, help us to find answer for this one

311.
What are the names of default standard streams in C++?

cin

cout

cerr

clogse

All of the above

Answer

Correct Answer: cin
cout
cerr

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

312.
Which of the following is TRUE? (Choose all that apply)

Changing a reference changes the referent.

We can create an array of references.

References can be set to null after initialized.

Answer

Correct Answer: Changing a reference changes the referent.

Note: This Question is unanswered, help us to find answer for this one

313.
Which of the following is true? (Choose all that apply)

Once a variable and a reference are linked, they are tied together.

Once a reference to a variable has been declared, no further references to that variable are allowed.

A global variable can be returned by reference.

A local variable may not be returned by reference.

Answer

Correct Answer: Once a variable and a reference are linked, they are tied together.
A global variable can be returned by reference.
A local variable may not be returned by reference.

Note: This question has more than 1 correct answers

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314.
What is the output of following program? #include <iostream> using namespace std; int main() { int i, j; j = 0; i = (j++, j + 1, 2 + j); cout << i; return 0; }

Answer

Correct Answer: 3

Note: This Question is unanswered, help us to find answer for this one

315.
What is the output of the following? #include <iostream> using namespace std; int main () { int x, y; x = 1; y = ++x * ++x; cout << x << y; x = 1; y = x++ * ++x; cout << x << y; return 0; }

3434

3436

3933

3439

3936

3939

Answer

Correct Answer: 3933

Note: This Question is unanswered, help us to find answer for this one

316.
What will be the output of following code:- #include <iostream> using namespace std; int main() { int a = 1, b = 2, c, d; c = a, b; d = (a, b); cout << c << ' ' << d; return 0; }

1, 2 (1,2)

1 2 1 2

1 2

1, 2, 1, 2

(1, 2) (1, 2)

Answer

Correct Answer: 1 2

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317.
Which of the following gets called when an object goes out of scope?

Constructor

Destructor

function

object

Answer

Correct Answer: Destructor

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318.
Which of the following access specifier is used in a class definition by default?

Protected

Public

Private

Friend

Answer

Correct Answer: Private

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319.
Which of the following statement is incorrect?

The default value for an argument can be a global constant.

The default arguments are given in the function prototype.

Compiler uses the prototype information to build a call, not the function definition.

The default arguments are given in the function prototype and should be repeated in the function definition.

A default argument is checked for type at declaration time, and then evaluated at call time.

Answer

Correct Answer: The default arguments are given in the function prototype and should be repeated in the function definition.

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320.
To ensure that every object in the array receives a destructor call, always delete memory allocated as an array with operator ___.

destructor

delete

delete[]

kill[]

free[]

nuke[]

Answer

Correct Answer: delete[]

Note: This Question is unanswered, help us to find answer for this one

321.
What is a function template?

creating a function without having to specify the exact type.

creating a function with having an exact type.

Both of the above.

None of the above.

Answer

Correct Answer: creating a function without having to specify the exact type.

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322.
Which of the following type of data member can be shared by all instances of a class?

public

friend

static

inherited

Answer

Correct Answer: static

Note: This Question is unanswered, help us to find answer for this one

323.
Which of the following keywords is used to control access to a class member?

Default

Break

Protected

ASM

Answer

Correct Answer: Protected

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324.
How many objects can be created from an abstract class?

Unlimited

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

325.
Which of the following statements is/are correct?

A constructor of a derived class can access any public and protected member of the base class.

Constructor cannot be inherited but the derived class can call them.

A constructor of a derived class cannot access any public or protected member of the base class.

Answer

Correct Answer: A constructor of a derived class can access any public and protected member of the base class.
Constructor cannot be inherited but the derived class can call them.

Note: This question has more than 1 correct answers

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326.
Which of the following is true about destructors?

A destructor has float return type.

A destructor has integer return type.

A destructor has no return type.

A destructor's return type is the same as that of main().

Answer

Correct Answer: A destructor has no return type.

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327.
Destructor has the same name as constructor and it is preceded by ___?

Answer

Correct Answer: ~

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328.
If a copy constructor receives its arguments by-value, the copy constructor will ____.

function correctly without a problem.

call the one-argument constructor of the class.

call itself recursively.

call the zero-argument (default) constructor.

Answer

Correct Answer: call itself recursively.

Note: This Question is unanswered, help us to find answer for this one

329.
A constructor that accepts ____ parameters is called default constructor.

Answer

Correct Answer: 0

Note: This Question is unanswered, help us to find answer for this one

330.
Which constructor function is designed to copy objects of the same class type?

Create constructor

copy constructor

Object constructor

Dynamic constructor

Answer

Correct Answer: copy constructor

Note: This Question is unanswered, help us to find answer for this one

331.
Which of the following statements are correct? (Choose all that apply)

Constructor has the same name as that of the class.

Constructor has the same name as that of the class with a '+' symbol at the beginning.

Destructor has the same name as that of the class with a tilde symbol at the beginning.

Destructor has the same name as that of the class with a '-' symbol at the beginning.

Destructor has the same name as the first member function of the class.

Destructor has the same name as that of the class with a "Destructor" appended at the end.

Answer

Correct Answer: Constructor has the same name as that of the class.
Destructor has the same name as that of the class with a tilde symbol at the beginning.

Note: This question has more than 1 correct answers

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332.
What does container adapter provide to interface?

Restricted interface

More interface

No interface

None of the above.

Answer

Correct Answer: Restricted interface

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333.
Which of the following is true in relation to destructors for automatic objects if a program terminates with a call to a function exit?

They are called.

They are not called.

They are inherited.

They are disinherited.

They are created.

They are destroyed.

Answer

Correct Answer: They are not called.

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334.
Which of the following is not a type of constructor?

Copy constructor

Friend constructor

Default constructor

Parameterized constructor

Answer

Correct Answer: Friend constructor

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335.
Void pointer can point to which type of objects?

int

float

double

All of the above.

Answer

Correct Answer: All of the above.

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336.
How many default constructors per class are possible?

Unlimited

Answer

Correct Answer: 1

Note: This Question is unanswered, help us to find answer for this one

337.
Which is used to create a pure Virtual function?

Answer

Correct Answer: =0

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338.
To which type of class we can apply RTTI?

Encapsulation

Polymorphic

Derived

None of the above.

Answer

Correct Answer: Polymorphic

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339.
The pointer which stores the current active object address is ___

this

*ptr

auto_ptr

None of the above.

Answer

Correct Answer: this

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340.
Copy constructor must receive its arguments by ___?

either pass-by-value or pass-by-reference

only pass-by-value

only pass-by-reference

None of the above.

Answer

Correct Answer: only pass-by-reference

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341.
Which of the following members are not accessed by using the direct member access operator?

private

public

protected

none of the above

Answer

Correct Answer: protected

Note: This Question is unanswered, help us to find answer for this one

342.
The stream ‘cout’ is by default connected to console output ___.

Object

Class

Device

Hardware

Answer

Correct Answer: Device

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343.
Which of the following storage classes are supported in C++?

auto and static

extern

registerd and mutable

All of the above.

Answer

Correct Answer: auto and static
extern

Note: This question has more than 1 correct answers

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344.
Which operator is used to allocate memory?

new

free

Answer

Correct Answer: new

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345.
Runtime polymorphism is achieved only when a virtual function is accessed through a ____ to the base class.

Object

Pointer

Function

Event

Answer

Correct Answer: Pointer

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346.
How many number of arguments can a destructor of a class receives?

None of the above.

Answer

Correct Answer: 0

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347.
What happens when a handler is not found for a given exception?

An error is raised.

A call is made to the standard library function terminate().

The remaining code block is executed.

None of the above.

Answer

Correct Answer: A call is made to the standard library function terminate().

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348.
Which of the following is not a member of a class?

Static function

Friend function

Const function

Virtual function

Answer

Correct Answer: Friend function

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349.
Which of the following statement is correct? (Choose all that apply)

C++ permits the defining of functions taking constants as an argument.

Where function arguments are declared as constant, these arguments can not be changed.

C++ does not permit the use of constants when defining functions.

Answer

Correct Answer: C++ permits the defining of functions taking constants as an argument.
Where function arguments are declared as constant, these arguments can not be changed.

Note: This question has more than 1 correct answers

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350.
Which of the following statements are true? (Choose all that apply.)

The expressions ... N::A ::B ... imply that A is in the same namespace as B.

The expression ... p -> m ... is equivalent to ... (*p).m

The expression ... p[x] .... is equivalent to ... *(p+x)

The expression ... v++ ... is equivalent to ... v+=1

The expression ... x!=y ... is equivalent to ... !(x==y)

The expression ... a+b*c ... is equivalent to ... (a+b)*c

Answer

Correct Answer: The expression ... p -> m ... is equivalent to ... (*p).m
The expression ... p[x] .... is equivalent to ... *(p+x)
The expression ... v++ ... is equivalent to ... v+=1

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

351.
Which of the following are TRUE? (Choose all that apply)

Default arguments can be provided for pointers to functions.

A function cannot have all its arguments as default.

A default argument cannot be redefined in a later declaration.

Answer

Correct Answer: Default arguments can be provided for pointers to functions.
A function cannot have all its arguments as default.

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

352.
Which of the following types of inheritance supported in C++?

Single

Multilevel

Multiple

Hierarchical

Hybrid

Answer

Correct Answer: Single
Multilevel
Multiple
Hierarchical
Hybrid

Note: This question has more than 1 correct answers

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353.
Consider the sample code given below and answer the question that follows.

class Outer
{
   public:
     class Inner
       {
         int Count;
         public:
         Inner(){};
       };
};
int main()
   {
Inner innerObject;
Outer outObject;
return 0;
   }

What will be the result when the above code is compiled?

The code will compile fine

There will be errors because classes cannot be defined inside other classes

There will be an error because Outer does not define a constructor

There will be an error because in the declaration of innerObject the type Inner must be qualified by Outer

There will be no errors but a warning that Inner and Outer do not have destructors

Answer

Correct Answer: There will be an error because in the declaration of innerObject the type Inner must be qualified by Outer

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354.
Consider the sample code given below and answer the question that follows.

class Person
{
public:
    Person();
       virtual ~Person();
};
class Student : public Person
{
public:
    Student();
    ~Student();
};
main()
{
    Person *p = new Student();
    delete p;
}

Why is the keyword "virtual" added before the Person destructor?

To make it impossible for this particular destructor to be overloaded

To ensure that correct destructor is called when p is deleted

To ensure that the destructors are called in proper order

To improve the speed of class Person's destruction

To prevent the Person class from being instantiated directly making it an abstract base class

Answer

Correct Answer: To ensure that correct destructor is called when p is deleted

Note: This Question is unanswered, help us to find answer for this one

355.
Consider the following code:
#include<iostream>
using namespace std;
class A
{
public:
A()
{
cout << "Constructor of A\n";
};
~A()
{
cout << "Destructor of A\n";
};
};
class B
{
public:
B()
{
cout << "Constructor of B\n";
};
~B()
{
cout << "Destructor of B\n";
};
};
class C
{
public:
A objA;
B objB;
};
int main()
{
C *pC;
pC = new C();
delete pC;
return 0;
}
What will be the printed output?

Constructor of B Constructor of A Destructor of A Destructor of B

Constructor of A Constructor of B Destructor of B Destructor of A

Constructor of B Constructor of A Destructor of B Destructor of A

Constructor of A Constructor of B Destructor of A Destructor of B

The sequence of construction and destruction of A and B will be compiler specific

Answer

Correct Answer: Constructor of A Constructor of B Destructor of B Destructor of A

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356.
What will happen when the following code is compiled and executed?
#include<iostream>
using namespace std;
class myclass
{
private:
int number;
public:
myclass()
{
number = 2;
}
int &a()
{
return number;
}
};
int main()
{
myclass m1,m2;
m1.a() = 5;
m2.a() = m1.a();
cout << m2.a();
return 0;
}

Compile time errors will be generated because right hand side of expressions cannot be functions

The printed output will be 5

The printed output will be 2

The printed output will be undefined

Answer

Correct Answer: The printed output will be 5

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357.
Which of the following member functions can be used to add an element in
an std::vector?

add

front

push

push_back

Answer

Correct Answer: push_back

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358.
What will be the output of the following code?
class A
{
public:
A():pData(0){}
~A(){}
int operator ++()
{
pData++;
cout << "In first ";
return pData;
}
int operator ++(int)
{
pData++;
cout << "In second ";
return pData;
}
private:
int pData;
};
void main()
{
A a;
cout << a++;
cout << ++a;
}

In first 1 In second 2

In second 1 In first 2

In first 0 In second 2

In second 0 In first 2

Answer

Correct Answer: In second 1 In first 2

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359.
If input and output operations have to be performed on a file, an object of
the _______ class should be created.

fstream

iostream

ostream

istream

None

Answer

Correct Answer: fstream

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360.
Which of the following STL classes is deprecated (i.e should no longer be
used)?

ostrstream

ostringstream

ostream

wostream

Answer

Correct Answer: ostrstream

Note: This Question is unanswered, help us to find answer for this one

361.
which of the following is true.

Function templates in C++ are used to create a set of functions that apply the same algorithm to different data types

Classes in C++ are used to develop a set of type-safe classes

C++ is useful for developing collection classes

C++ is useful for developing smart pointers

All of the above

Answer

Correct Answer: All of the above

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362.
No, var1 and var2 are not functions but are variables

good

fail

eof

err

error

filerror

None of the above

Answer

Correct Answer: ad
fail

Note: This question has more than 1 correct answers

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363.
In the given sample Code, is the constructor definition valid?
class someclass
{
int var1, var2;
public:
someclass(int num1, int num2) : var1(num1), var2(num2)
{
}
};

Yes, it is valid

No, we cannot assign values like this

No, the parenthesis cannot be empty

No, var1 and var2 are not functions but are variables

Answer

Correct Answer: Yes, it is valid

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364.
Consider the following class hierarchy:
class Base
{ }
class Derived : public Base
{ }
Which of the following are true?

The relationship between the Base and Derived can be described as: Base is a Derived

The relationship between the Base and Derived can be described as: Base has a Derived

Derived can access only public member functions of Base

Derived can access public and protected member functions of Base

The following line of code is valid: Base *object = new Derived();

Answer

Correct Answer: Derived can access public and protected member functions of Base
The following line of code is valid: Base *object = new Derived();

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

365.
Consider the sample code given below and answer the question that
follows.
class A
{
public:
A() {}
~A()
{
cout << "in destructor" << endl;
}
};
void main()
{
A a;
a.~A();
}
How many times will "in destructor" be output when the above code is
compiled and executed?

A compile time error will be generated because destructors cannot be called directly

Answer

Correct Answer: 2

Note: This Question is unanswered, help us to find answer for this one

366.
What is the output of the following code segment?
int n = 9;
int p;
p=&n;
n++;
cout << p+2 << "," << n;

11,9

9,10

12,10

11,10

Answer

Correct Answer: 12,10

Note: This Question is unanswered, help us to find answer for this one

367.
Which of the following are true about class and struct in C++:

A class can have destructor but a struct cannot

A class can have inheritance but a struct cannot

In a class all members are public by default, whereas in struct all members are private by default

In a class all members are private by default, whereas in struct all members are public by default

Answer

Correct Answer: A class can have inheritance but a struct cannot
In a class all members are private by default, whereas in struct all members are public by default

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

368.
Which of the following statements about constructors and destructors are
true?

In a given class, constructors are always required to be defined, but destructors are not

Neither constructors nor destructors can take parameters

Constructors can take parameters, but destructors cannot

It is illegal to define a destructor as virtual

It is illegal to define a constructor as virtual

Both explicitly declared constructors and explicitly declared destructors are required in a class

Answer

Correct Answer: Constructors can take parameters, but destructors cannot
It is illegal to define a constructor as virtual

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

369.
You want the data member of a class to be accessed only by itself and by
the class derived from it. Which access specifier will you give to the data
member?

Public

Private

Protected

Friend

Either Public or Friend

Answer

Correct Answer: Protected

Note: This Question is unanswered, help us to find answer for this one

370.
Which of the following is not a standard STL header?

<array>

<deque>

<queue>

<list>

Answer

Correct Answer: <array>

Note: This Question is unanswered, help us to find answer for this one

371.
Consider the sample code given below and answer the question that
follows.
template <class T> Run(T process);
Which one of the following is an example of the sample code given above?

A non-template member function

A template function definition

A template function declaration

A template class definition

A template class declaration

Answer

Correct Answer: A template function declaration

Note: This Question is unanswered, help us to find answer for this one

372.
Consider the sample code given below and answer the question that
follows.
class SomeClass
{
int x;
public:
SomeClass (int xx) : x(xx) {}
};
SomeClass x(10);
SomeClass y(x);
What is wrong with the sample code above?

SomeClass y(x); will generate an error because SomeClass has no copy constructor

SomeClass y(x); will generate an error because SomeClass has no default constructor

SomeClass y(x); will generate an error because SomeClass has no public copy constructor

x(xx) will generate an error because it is illegal to initialize an int with that syntax

The code will compile without errors

Answer

Correct Answer: The code will compile without errors

Note: This Question is unanswered, help us to find answer for this one

373.
Consider the following statements relating to static member functions and
choose the appropriate options:
1. They have external linkage
2. They do not have 'this' pointers
3. They can be declared as virtual
4. They can have the same name as a non-static function that has the
same argument types

All are true

Only 1, 2 and 4 are true

Only 1 and 2 are true

Only 1,3 and 4 are true

All are false

Answer

Correct Answer: Only 1 and 2 are true

Note: This Question is unanswered, help us to find answer for this one

374.
What will be the output of the following code?
class b
{
int i;
public:
virtual void vfoo()
{
cout <<"Base ";
}
};
class d1 : public b
{
int j;
public:
void vfoo()
{
j++;
cout <<"Derived";
}
};
class d2 : public d1
{
int k;
};
void main()
{
b *p, ob;
d2 ob2;
p = &ob;
p->vfoo();
p = &ob2;
p->vfoo();
}

Base Base

Base Derived

Derived Base

Derived Derived

Answer

Correct Answer: Base Derived

Note: This Question is unanswered, help us to find answer for this one

375.
Consider the line of code given below and answer the question that follows.
class screen;
Which of the following statements are true about the class declaration
above?

Incorrect syntax. The body of the class declaration is missing

Incorrect syntax. {}; is missing

The syntax is correct

Incorrect syntax. {} is missing

Incorrect syntax. Requires a *

Answer

Correct Answer: The syntax is correct

Note: This Question is unanswered, help us to find answer for this one

376.
Which of the following is NOT a standard sorting algorithm:

std::sort

std::qsort

std::stable_sort

std::partial_sort

Answer

Correct Answer: std::qsort

Note: This Question is unanswered, help us to find answer for this one

377.
What does ADT stand for?

Accessible derived type

Access to derived type

Abstract data type

Abstract derived type

Accessible data type

Answer

Correct Answer: Abstract data type

Note: This Question is unanswered, help us to find answer for this one

378.
In C++, the keyword auto can be used for:

Automatic assignment of data to objects during instantiation

Automatic call of a function

Declaration of a local variable

Automatically erasing an object when it is no longer needed

Automatic handling of run-time errors in the program

Automatic termination of a program in case the user does not respond within a given time period

Automatic creation of variables

Answer

Correct Answer: Declaration of a local variable

Note: This Question is unanswered, help us to find answer for this one

379.
In C++, the keyword auto can be used for:

vector::empty deletes all elements of the vector

vector::erase can be used to delete a single element and a range of elements of the vector

After calling, vector::erase causes some of the iterators referencing the vector to become invalid

vector::count returns the number of elements in the vector

vector::size returns the number of elements in the vector

vector::capacity returns the number of elements in the vector

Answer

Correct Answer: vector::erase can be used to delete a single element and a range of elements of the vector
After calling, vector::erase causes some of the iterators referencing the vector to become invalid
vector::size returns the number of elements in the vector

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

380.
Which of the following statements about function overloading, is true?

C++ and namespaces should be used to replace occurrences of function overloading

Overloaded functions may not be declared as "inline"

Although the return types and parameter types of overloaded functions can be different, the actual number of parameters cannot change

Function overloading is possible in both C and C++

The parameter lists and const keyword are used to distinguish functions of the same name declared in the same scope

Answer

Correct Answer: The parameter lists and const keyword are used to distinguish functions of the same name declared in the same scope

Note: This Question is unanswered, help us to find answer for this one

381.
Consider the sample code given below and answer the question that
follows.
class Person
{
string name;
int age;
Person spouse;
public:
Person(string sName);
Person(string sName, int nAge);
Person(const Person& p);
Copy(Person p);
Copy(const Person &p);
SetSpouse(Person *s);
};
Which one of the following are declarations for a copy constructor?

Person(string sName);

Person(string sName, int nAge);

Copy(Person *p);

Person(const Person &p);

Copy(const Person &p)?

Answer

Correct Answer: Person(const Person &p);

Note: This Question is unanswered, help us to find answer for this one

382.
Which of the following statements are true for operator overloading in C++?

The * operator can be overloaded to perform division

The * operator can be overloaded to perform assignment

** can be overloaded to perform "to the power of"

Operators can be overloaded only in inside classes

Operators can be overloaded globally

Answer

Correct Answer: The * operator can be overloaded to perform division
The * operator can be overloaded to perform assignment
Operators can be overloaded globally

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

383.
What linkage specifier do you use in order to cause your C++ functions to
have C linkage

extern "C"

extern C

_stdcall

_cdecl

_fastcall?

Answer

Correct Answer: extern "C"

Note: This Question is unanswered, help us to find answer for this one

384.
Which of the following statements regarding functions are false?

Functions can be overloaded

Functions can return the type void

Inline functions are expanded during compile time to avoid invocation overhead

You can create arrays of functions

You can pass values to functions by reference arguments

You can return values from functions by reference arguments

A function can return a pointer

Answer

Correct Answer: You can create arrays of functions

Note: This Question is unanswered, help us to find answer for this one

385.
A pure virtual function can be declared by _______.

equating it to 1

equating it to 0

equating it to NULL

the 'pure' keyword

the 'abstract' keyword

Answer

Correct Answer: equating it to 0
equating it to NULL

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

386.
Consider the following code:
class Animal
{
private:
int weight;
public:
Animal()
{
}
virtual void Speak()
{
cout << "Animal speaking";
}
};
class Snake : public Animal
{
private:
int length;
public:
Snake()
{
}
void Speak()
{
cout << "Snake speaking\r\n";
}
};
int main()
{
Animal *array = new Snake[10];
for (int index= 0; index < 10; index++)
{
array->Speak();
array++;
}
return 0;
}
What happens when the above code is compiled and executed?

The code will generate compilation errors

The code will compile and run fine. "Animal speaking" will be printed to the output

The code will compile and run fine. "Snake speaking" will be printed to the output

The code will crash at runtime

Answer

Correct Answer: The code will crash at runtime

Note: This Question is unanswered, help us to find answer for this one

387.
Which of the following is a predefined object in C++ and used to insert to the standard error output?

std::err

std::error

std::cerror

std::ce

std::cin

std::clog

Answer

Correct Answer: std::ce

Note: This Question is unanswered, help us to find answer for this one

388.
Which of the following are true about class member functions and constructors?

A constructor can return values but a member function cannot

A member function can declare local variables but a constructor cannot

A member function can return values but a constructor cannot

A constructor can declare local variables but a member function cannot

A member function can throw exceptions but a constructor cannot

Answer

Correct Answer: A member function can return values but a constructor cannot

Note: This Question is unanswered, help us to find answer for this one

389.
Which of the following sets of functions do not qualify as overloaded functions?

void fun(int, char *) void fun(char *,int)

void x(int,char) int *x(int,char)

int get(int) int get(int,int)

void F(int *) void F(float *)

All of the above are overloaded functions

Answer

Correct Answer: void x(int,char) int *x(int,char)

Note: This Question is unanswered, help us to find answer for this one

390.
If a matching catch handler (or ellipsis catch handler) cannot be found for the current exception, then the following predefined runtime function is called ______.

abort

set_terminate

terminate

Answer

Correct Answer: terminate

Note: This Question is unanswered, help us to find answer for this one

391.
Consider the following code:

#include<iostream>
using namespace std;
int main()
{
cout << "The value of LINE is " <<LINE;
return 0;
}

What will be the result when the above code is compiled and executed?

The compilation will fail with the error - '__LINE__' : undeclared identifier

The compilation will fail with the error - '__LINE__' unresolved identifier

The code will compile and run without errors

The code will crash at runtime

Answer

Correct Answer: The code will compile and run without errors

Note: This Question is unanswered, help us to find answer for this one

392.
Which of the following operators cannot be overloaded?

Answer

Correct Answer: .
::
?:

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

393.
What will be the output of the following code?

#include<iostream>
using namespace std;
class b
{
int i;
public:
void vfoo()
{ cout <<"In Base "; }
};
class d : public b
{
int j;
public:
void vfoo()
{
cout<<"In Derived ";
}
};
void main()
{
b *p, ob;
d ob2;
p = &ob;
p->vfoo();
p = &ob2;
p->vfoo();
ob2.vfoo();
}

In Base In Base In Derived

In Base In Derived In Derived

In Derived In Derived In Derived

In Derived In Base In Derived

In Base In Base In Base

Answer

Correct Answer: In Base In Base In Derived

Note: This Question is unanswered, help us to find answer for this one

394.
Unary operator overloaded by means of a friend function takes one reference argument.

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

395. Which of the following STL classes is deprecated (ie should no longer be used)

ostrstream

ostringstream

ostream

wostream

Answer

Correct Answer: ostrstream

Note: This Question is unanswered, help us to find answer for this one

396. Suppose MyClass is a class that defines a copy constructor and overloads the assignment operator. In which of the following cases will the copy constructor of MyClass be called?

When an object of MyClass is passed by value to a function

When an object of MyClass is returned by value from a function

MyClass object1;    MyClass object2;    object2 = object1;

MyClass object1;    MyClass *object2  = new MyClass(object1);

MyClass object1;    MyClass object2 = object1;

Answer

Correct Answer: When an object of MyClass is passed by value to a function

Note: This Question is unanswered, help us to find answer for this one

397. Consider the following code:

class BaseException
{
 public:
 virtual void Output()
 {
 cout << "Base Exception" << endl;
 }
};

class DerivedException : public BaseException
{
 public:
 virtual void Output()
 {
 cout << "Derived Exception" << endl;
 }
};

void ExceptionTest()
{
 try
 {
 throw new DerivedException();
 }
 catch (DerivedException ex)
 {
 ex.Output();
 }
 catch (...)
 {
 cout << "Unknown Exception Thrown!" << endl;
 }
}

Invoking Exception Test will result in which output?

Base Exception

Derived Exception

Unknown Exception Thrown

No Output will be generated

Answer

Correct Answer: Base Exception

Note: This Question is unanswered, help us to find answer for this one

398. How many arguments can be passed to an overloaded binary operator?

Answer

Correct Answer: 2

Note: This Question is unanswered, help us to find answer for this one

399. Which of the following statements are true?

Inline functions should be preferred over macros because inline functions have better performance

Macro usage should be avoided because they are error prone

Normal functions should be preferred over macros because normal functions have better performance

Macro usage should be avoided because macros do not perform type checking

Inline functions should be preferred over macros because inline functions perform type checking

Answer

Correct Answer: Macro usage should be avoided because they are error prone

Note: This Question is unanswered, help us to find answer for this one

400. Which of the following members and functions can only be accessed from within the class in which it was defined and from within its derived classes?

Protected

Private

Friend

Restricted

Public

Answer

Correct Answer: Protected

Note: This Question is unanswered, help us to find answer for this one

401. Which of the following is the difference between these two declarations in C++? void foo(); void foo(void);

No difference, they are equivalent

The first one is illegal

One of them takes no value, the other takes any value

The second one is illegal

Answer

Correct Answer: No difference, they are equivalent

Note: This Question is unanswered, help us to find answer for this one

402. Given the following code, how many bytes of memory does an instance of foo occupy? class foo { int x; short y; };

Other/This is invalid C++ code

Depends on the target platform and implementation

Answer

Correct Answer: Depends on the target platform and implementation

Note: This Question is unanswered, help us to find answer for this one

403. Is this program correct? class A { int a; friend class B; }; class B { friend class C; }; class C { void foo() { A a; a.a = 4; } };

Implementation dependent

Yes

No, friend declarations are not transitive

Answer

Correct Answer: No, friend declarations are not transitive

Note: This Question is unanswered, help us to find answer for this one

404. Which is the initial value of result if the following variable definition is declared inside a function body? int result;

NULL

undefined

Answer

Correct Answer: undefined

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405. Which of the following is a variable that holds a large group of similar type data?

Multiple variable

Float

Integer

Constant

Array

Answer

Correct Answer: Array

Note: This Question is unanswered, help us to find answer for this one

406. Which task does the following statement perform? std::cout << x;

Writes the contents of x to stdout

Stores the contents of x in the cout variable

Writes the character 'x' to stdout

Answer

Correct Answer: Writes the contents of x to stdout

Note: This Question is unanswered, help us to find answer for this one

407. Which of the following is the content of vector v given the code below? std::vector v(4); std::fill(v.begin(), v.end(), 4);

4, 5, 6, 7

4, 4, 4, 4

0, 1, 2, 3

1, 2, 3, 4

Answer

Correct Answer: 4, 4, 4, 4

Note: This Question is unanswered, help us to find answer for this one

408. What is the difference between the following? int a(0); and int a = 0;

None

int a(0); is not legal code in C++ because int is not a class

int a(0) works in C but int a = 0 works both in C and C++

int a(0) calls the int ctor and int a=0 calls the operator= of the int class

int a(0) happens at compile time and int a=0 happens at runtime

Answer

Correct Answer: None

Note: This Question is unanswered, help us to find answer for this one

409. Which is the right way to place an opening curly bracket in C++?

Opening curly brackets should always be placed on the next line after the statement referring to the block it defines

There is no C++ rule about placing curly brackets

Curly brackets are not legal in C++ code

Opening curly brackets should always be placed on the same line with the statement referring to the block it defines

Answer

Correct Answer: There is no C++ rule about placing curly brackets

Note: This Question is unanswered, help us to find answer for this one

410. A structure item exists in your code with integer member units. Given the following variable declaration, how should you access the value of units? item * myItem;.

myItem->units

myItem.units

*(myItem.units)

Answer

Correct Answer: myItem->units

Note: This Question is unanswered, help us to find answer for this one

411. For which circumstance should you use the preprocessor directive #include <iostream> in your C++ program?

Your program uses cout function calls

Your program uses standard elements

Your program uses a return value

Answer

Correct Answer: Your program uses cout function calls

Note: This Question is unanswered, help us to find answer for this one

412. Which purpose should the following line serve in a C++ program? #include

Tells the preprocessor to include the iostream standard file only if it is required by the program

Tells the preprocessor to include the iostream standard file

Tells the program to include the standard library header files

Answer

Correct Answer: Tells the preprocessor to include the iostream standard file

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413. Which of the following do the ellipses indicate, given the code sample below? catch(…) { cout << "exception";}.

The handler will catch any type of error thrown

All of these

The handler will only catch int exceptions

None of these

Answer

Correct Answer: The handler will catch any type of error thrown

Note: This Question is unanswered, help us to find answer for this one

414. Given the following code: void foo(){ static int x=10; } When is x created?

Every time foo() is called

When the process is created

The code will not compile

At the first call of foo()

Answer

Correct Answer: At the first call of foo()

Note: This Question is unanswered, help us to find answer for this one

415. Which of the following is not permitted in a pure virtual class in C++?

Protected functions

Member variables

Static member variables

Private member variables

All of these are permitted

Answer

Correct Answer: All of these are permitted

Note: This Question is unanswered, help us to find answer for this one

416. Given an external function that needs access to private and protected members of a class, you would specify the function as:

void myClass myFunction(myClass);

friend myClass myFunction(myClass);

myClass myFunction(friend myClass);

Answer

Correct Answer: friend myClass myFunction(myClass);

Note: This Question is unanswered, help us to find answer for this one

417. Which of the following does the code below create? int * p; p=0;?

Both Null and Void

Void pointer

Neither Null nor Void

Null pointer

Answer

Correct Answer: Null pointer

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418. Which is the difference between classes and structures?

Structures cannot include types

Elements of a class are private by default

None of these

Classes can include members

Answer

Correct Answer: Elements of a class are private by default

Note: This Question is unanswered, help us to find answer for this one

419. Which of the following does "int *p; p = 0;" do?

Nothing, it's illegal and won't compile

Sets p to nullptr

Zeroes out the memory that p is pointing to

Crashes your program

Answer

Correct Answer: Sets p to nullptr

Note: This Question is unanswered, help us to find answer for this one

420. If class B inherits class A, A::x() and is declared virtual, and B::x() overrides A::x(), which method x() will be called by the following code? B b; b.x();

A::x() followed by B::x()

B::x()

B::x() followed by A::x()

A::x()

Answer

Correct Answer: B::x()

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421. Which is the proper way to use the .substr() function on the following string to get the word "World" in the following code? string aString = "Hello World!";

aString.substr(5,10);

aString.substr(5,5);

aString.substr(6,10);

aString.substr(6,5);

Answer

Correct Answer: aString.substr(6,5);

Note: This Question is unanswered, help us to find answer for this one

422. Which is the value of C in the following code? int C++;

Undefined

Whatever C was before plus one

This is invalid code in C++

C is still a good programming language but C++ is better

Answer

Correct Answer: This is invalid code in C++

Note: This Question is unanswered, help us to find answer for this one

423. Which is the output of the following program? int main () { cout << "Hello World!"; return 0; }

Hello World

Hello World!

Syntax error

Answer

Correct Answer: Hello World!

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424. Which statement declares a function with arguments passed by reference?

void myfunction(int a, int b)

void myfunction(int& a, int& b)

void myfunction(int* a, int* b)

Answer

Correct Answer: void myfunction(int& a, int& b)

Note: This Question is unanswered, help us to find answer for this one

425. The printmsg function does not require any arguments. Which of the following statements calls the printmsg function?

printmsg;

printmsg();

void printmsg();

Answer

Correct Answer: printmsg();

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426. Which statement declares a function with a default value for an argument?

void myfunction(int a=2)

void myfunction(int a;a = 2)

void myfunction(int a)

Answer

Correct Answer: void myfunction(int a=2)

Note: This Question is unanswered, help us to find answer for this one

427. The process of TYPECASTING makes one variable appear to be another type of data. Which of the following are the two processes of TYPECASTING?

Expletive and Implicit

Single and double

Forecasting and Fivecasting

Explicit and Implicit

Answer

Correct Answer: Explicit and Implicit

Note: This Question is unanswered, help us to find answer for this one

428. Which of the following is the default access level assigned to members of a class?

Default

Protected

Private

Public

Answer

Correct Answer: Private

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429. How should the main part of the following program access myNamespace variable a, given the code below? namespace myNamespace { int a; int b; }

myNamespace::a

myNamespace:a

Answer

Correct Answer: myNamespace::a

Note: This Question is unanswered, help us to find answer for this one

430. Which of the following describes the difference between an array and a vector?

Vectors don't support random access to elements, but arrays do

Vectors can be dynamically resized, but an array's size is fixed

Arrays require the STL, but vectors are native to C++

Arrays take more memory to store data than vectors

Vectors can hold data of different types, but arrays can only hold data of one type

Answer

Correct Answer: Vectors can be dynamically resized, but an array's size is fixed

Note: This Question is unanswered, help us to find answer for this one

431. Which is the correct value of 7 == 5+2 ? 4 : 3?

Answer

Correct Answer: 4

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432. Which of the following function prototypes will overload the addition operator between two objects of the type Distance?

overload operator+(Distance a, Distance b);

Distance operator+(Distance a, Distance b);

Distance overrides operator+(Distance a, Distance b);

Distance overload operator+(Distance a, Distance b);

Distance operator+ overload(Distance a, Distance b);

Answer

Correct Answer: Distance operator+(Distance a, Distance b);

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433. True or False: Classes can contain static member variables that are global to the class and can be accessed by all objects of the same class.

False

True

Answer

Correct Answer: True

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434. Which of the following C++ function declarations is valid and passes the the function parameters by reference?

void myFunction( int a, int b, int c)

void myFunction (int& a, int& b, int& c)

ref myFunction(int a, int b, int c)

Answer

Correct Answer: void myFunction (int& a, int& b, int& c)

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435. At which point does a C++ program begin its execution?

None of these

Main function

Function specified by the preprocessor

Answer

Correct Answer: Main function

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436. Which symbol separates C++ statements?

Hash symbol (#)

Colon (:)

Semi-colon (;)

Addition sign (+)

Answer

Correct Answer: Semi-colon (;)

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437. Which term can describe int, long, double, and string?

Attributes

Constructors

Class members

Data Types

Answer

Correct Answer: Data Types

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438. From which programming language was C++ derived?

Basic

French

Fortran

Answer

Correct Answer: C

Note: This Question is unanswered, help us to find answer for this one

439. Which of the following means the same as the statement below? i += 5;

i = i + 5;

i == i;

i * 5++;

5 += 1;

Answer

Correct Answer: i = i + 5;

Note: This Question is unanswered, help us to find answer for this one

440. Which of the following symbols calls the pre-processor to include the specified system files such as iostream?

Forward Slash (/)

Hash Symbol (#)

Exclamation Mark (!)

Ampersand (&)

Answer

Correct Answer: Hash Symbol (#)

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441. Which is the correct term for two different C++ functions that have the same name but different parameter types?

Inline functions

Recursive functions

Function overloading

Answer

Correct Answer: Function overloading

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442. Which of the following is the value of a = 11 % 3;?

Answer

Correct Answer: 2

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443. From which of the following is the dynamic memory requested by C++ programs allocated?

High memory

Memory heap

Memory stack

Memory

Answer

Correct Answer: Memory heap

Note: This Question is unanswered, help us to find answer for this one

444. Which term describes an ordered and indexed sequence of values?

Class

Array

Group

List of Parameters

Answer

Correct Answer: Array

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445. char * array = "Hello"; char array[] = "Hello"; What is the difference between the above two, if any, when using sizeof operator?

The sizeof returns the size of the char type (1) in both cases

The sizeof of an array gives the number of elements in the array, but sizeof of a pointer gives the actual size of a pointer variable

Answer

Correct Answer: The sizeof of an array gives the number of elements in the array, but sizeof of a pointer gives the actual size of a pointer variable

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446. Which process does operator+ perform on two instances of std::string?

Address addition

String concatenation

Nothing

None of these

Answer

Correct Answer: String concatenation

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447. Which of the following should you use the given code to do? std::vector foo {5}; (assume C++11)

Initialize a vector with 1 element of the value 5

Initialize a vector with 5 elements with value 0

Answer

Correct Answer: Initialize a vector with 1 element of the value 5

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448. C++ is strongly Object Oriented Language ?

False

True

Answer

Correct Answer: False

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449. Which of the following statements about virtual base classes is correct?

It is used to avoid multiple copies of base class in derived class.

It is used to provide multiple inheritance.

It allows private members of the base class to be inherited in the derived class.

It is used to allow multiple copies of base class in a derived class.

Answer

Correct Answer: It is used to avoid multiple copies of base class in derived class.

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450. How can we make a class abstract?

By declaring it abstract using the static keyword.

By declaring it abstract using the virtual keyword.

By making all member functions constant.

By making at least one member function as pure virtual function.

Answer

Correct Answer: By making at least one member function as pure virtual function.

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451. In C++, what will the code below output? #include main() { for (int x=1; x<10; ++x) { ++x; } cout << x; return 0; }

"x" was not declared in this scope.

The loop is infinite.

Answer

Correct Answer: "x" was not declared in this scope.

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452. A template class does all of the following EXCEPT

Template classes can take multiple template arguments.

Template classes save time and condense a project's source code, although can sometimes lead to code bloat, resulting in larger executables.

Template classes are more versatile than macros.

Template classes are primarily used as base classes for other derived classes.

Template classes you to create a generic class capable of dealing with a variety of types without having to be rewritten for each.

Answer

Correct Answer: Template classes are primarily used as base classes for other derived classes.

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453. An asterisk (*) immediately after a data type declares a variable as a pointer, and...

an ampersand (&) immediately before a variable name dereferences a pointer giving you its value when that variable has already been declared.

an asterisk (*) immediately before a variable name declares a variable as a reference as long as it hasn't yet been declared.

an ampersand (&) immediately after a data type causes a compiler SYNTAX ERROR.

an asterisk (*) immediately before a variable name dereferences a pointer giving you its value when that variable has already been declared.

an ampersand (&) immediately after a data type ALSO declares a variable as a pointer.

Answer

Correct Answer: an asterisk (*) immediately before a variable name dereferences a pointer giving you its value when that variable has already been declared.

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454. All of the following are true EXCEPT:

Global variables can cause the meaning of the code to become less clear.

Global variables are usually a bad choice as they more often cause memory leaks than locally scoped variables.

Global variables can make code more difficult to follow and understand.

Global variables, although typically should be avoided, have some instances where their use is appropriate.

Global variables can be useful because they can be accessed from anywhere in the program.

Answer

Correct Answer: Global variables are usually a bad choice as they more often cause memory leaks than locally scoped variables.

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455. True/False. The modulus (%) operator can be a slow operation on some processors, as it can require the processor to make three separate operations, depending on the CPU architecture.

False

True

Answer

Correct Answer: True

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456. True/False. There is no difference between a * pointer and an & reference.

True

False

Answer

Correct Answer: False

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457. True/False. A class declaration requires a semi-colon (;) after it is complete. Ie. Class MyClass { some code here };

False

True

Answer

Correct Answer: True

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458. A memory leak occurs when:

Memory is allocated and then goes out of scope before it is released.

Memory is allocated and then is released before it goes out of scope.

A variable is defined locally, and then is changed in a global context.

A variable is defined globally, and then is changed in a local context.

Memory is allocated, then released, then allocated again.

Answer

Correct Answer: Memory is allocated and then goes out of scope before it is released.

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459. Identifying classes by their standard typedefs, which of the following is NOT declared by the standard C++ library?

istream & istream::operator >> ( void * & )

istream & istream::operator >> ( streambuf & )

ostream & ostream::operator << ( streambuf * )

ostream & ends( ostream & )

ostream & ostream::operator << ( void * )

Answer

Correct Answer: istream & istream::operator >> ( streambuf & )

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460. What is the value of (false - ~0)?

Nothing. It's a type mismatch error.

-1

Unknown. That's implementation dependent.

Answer

Correct Answer: 1

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461. In C++ the three STL (Standard Template Library) container adapters are:

stack, linked_list, priority_queue

vector, queue, list

stack, queue, priority_queue

stack, linked_list, queue

Answer

Correct Answer: stack, queue, priority_queue

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462. What is the effect of 'const' following a member function's parameter declarations?

The function may be called on a const qualified object, and treats the object as const qualified.

The function cannot change the values of its parameters.

The function can only be called on a const qualified instance of the class.

The function returns the same value for each set of arguments.

Answer

Correct Answer: The function may be called on a const qualified object, and treats the object as const qualified.

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463. Can a static member function be declared as const?

Depends

Yes

Answer

Correct Answer: No

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464. What type of exceptions will the following function throw: int myfunction (int a) throw();?

All

None

Int

Answer

Correct Answer: None

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465. What does operator -> () do?

This operator does not exist in C++

Creates a virtual this pointer that can be used outside the scope of the class

Lets you define the pointer returned by this for a class

Defines the structure reference operator for a class

Defines the structure dereference operator for a class

Answer

Correct Answer: Defines the structure dereference operator for a class

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466. What will a declaration such as “extern "C" char foo(int);” do?

It tells the compiler that it should use C's calling convention for storing parameters and return values on the stack.

It ensures that foo's mangled link name matches that of the C compiler so it can be called from C functions.

It says that foo is an external function that will be compiled by the C compiler.

It tells the linker that it should find foo in the external section named "C" in the compiled file.

Nothing, it is a syntax error.

Answer

Correct Answer: It ensures that foo's mangled link name matches that of the C compiler so it can be called from C functions.

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467. double a = 1.0; double p = &a; a = a/p; Which of the following statements about the code is true?

Variable a is divided by the address of itself.

/* means the start of comments.

None of the above.

Variable a is divided by the value of itself.

Answer

Correct Answer: /* means the start of comments.

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468. What is the value of bar(1) in: int foo(int &x) { return ++x; } int bar(int x) { x += foo(x); return x; }

None, that is not valid C++ code.

Answer

Correct Answer: 4

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469. According to the C++11 standard, which of these is a keyword?

size_t

uint32_t

char32_t

final

mint32_t

Answer

Correct Answer: char32_t

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470. In the following class definition: class my_lock { std::atomic data; public: my_lock() : data{1} {} void unlock() { data = 1; } void lock(); } which could be used to complete the lock function, assuming the purpose of the above code is to create a mutex-like locking mechanism? Assume C++11.

void my_lock::lock() { int exp(0); while (!data.compare_and_swap(exp, 1)) exp = 0; }

void my_lock::lock() { int exp(0); while (!data.compare_exchange_strong(exp, 1)) exp = 0; }

void my_lock::lock() { int exp(1); while (!data.compare_exchange_strong(exp, 0)) exp = 1; }

void my_lock::lock() { int exp(1); while (!data.compare_and_swap(exp, 0)) exp = 1; }

void my_lock::lock() { exp = 0; }

Answer

Correct Answer: void my_lock::lock() { int exp(1); while (!data.compare_exchange_strong(exp, 0)) exp = 1; }

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471. What can we say about: myClass::foo(){ delete this; } .. void func(){ myClass *a = new myClass(); a->foo(); }

It will raise a segmentation fault

It won't compile

None of these.

It will raise a stack overflow

Answer

Correct Answer: None of these.

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472. Is the following well-formatted C++11 code? %:include int main (void) <% std::vector ivec <% 1, 2, 3 }; ??>

Yes, it will compile.

No, this is not valid C++ syntax.

Answer

Correct Answer: Yes, it will compile.

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473. If we have a class myClass , what can we say about the code: myClass::~myClass(){ delete this; this = NULL; }

It is correct, we avoid memory leaks.

It will cause a stack overflow

It is incorrect, it does not release any of the member variables.

It won't compile

Answer

Correct Answer: It won't compile

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474. class A { int x; protected: int y; public: int z; }; class B: private A { public: using A::y; }; What is the privacy level of B::y?

B does not inherit access to y.

public

protected

private

Answer

Correct Answer: public

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475. With: struct foo { int a:3, b:4, :0; int c:4, d:5; int e:3; }; Determine if each statement is true or false: Concurrent modification of foo::a and foo::c is or might be a data race. Concurrent modification of foo::a and foo::b is or might be a data race. Concurrent modification of foo::c and foo::e is or might be a data race.

false true true

false false false

true false true

true true true

false false false

false true false

Answer

Correct Answer: false true true

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476. If after: a* var = new a(); var's value is 0x000C45710 What is its value after: delete var;

Undefined

0xdeadbeef

0xcccccccc

0x00000000

0x000C45710

Answer

Correct Answer: 0x000C45710

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477. If sizeof(int)==4 what is sizeof(long)?

You cannot know because it depends on the machine

At least 4

At most 4

Answer

Correct Answer: At least 4

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478. signed int a = 5; unsigned char b = -5; unsigned int c = a > b; What is the value of c?

255

true

Answer

Correct Answer: 0

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479. int* a = {1, 2, 3}; | Where are the 1,2,3 values stored?

This code is not valid C++

On the stack

On the heap

Answer

Correct Answer: This code is not valid C++

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480. According to the IEEE standard, which of the following will always evaluate to true if the value of "var" is NaN?

var != var

var < 0

var > MAX_DOUBLE

var == nan

var == "NaN"

Answer

Correct Answer: var != var

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481. Below code fails to compile. class A { public: int GetValue() const { vv = 1; return vv; } private: int vv; }; Which of the following choices results in fixing this compilation error?

Any one of the specified choices fixes compilation error

Change the declaration of member function 'GetValue' so it is 'non const'

Change the declaration of member 'vv' to 'mutable int vv'

Answer

Correct Answer: Any one of the specified choices fixes compilation error

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482. Assuming you are using a 32-bit compiler on an x86 platform, what would the result of sizeof(A) typically be? struct A { char B; int* C; short D; };

Unknown; it is compiler and/or platform dependent

Answer

Correct Answer: 12

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483. What would the following program print? class Printer{ public: Printer(std::string name) {std::cout << name;} }; class Container{ public: Container() : b("b"), a("a") {} Printer a; Printer b; }; int main(){ Container c; return 0; }

Always

Either

Answer

Correct Answer: Always

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484. std::deque<int> queue; queue.push_back(1); int& ref = queue.back(); queue.push_back(2); Where does ref point to?

Front of the queue

Back of the queue

itr was invalidated by push_back

Answer

Correct Answer: Front of the queue

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485. What is the output of the following program: struct A { A() { std::cout << "A"; } template A(Args&&... args) { std::cout << "B"; } A(const A&) { std::cout << "C"; } }; int main() { A a; A b = a; }

ABC

Answer

Correct Answer: AB

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486. Virtual inheritance is needed...

to inherit from classes in different modules

to enable polymorphism

to enable runtime type information (RTTI)

to not get multiple ambiguous copies of members of ancestor classes

Answer

Correct Answer: to not get multiple ambiguous copies of members of ancestor classes

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487. What is the value of "v"? auto &p = 10; double v = p;

compilation error

undefined

10.0lf

Answer

Correct Answer: compilation error

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488. Suppose that a global variable "x" of type std::atomic with an initializer parameter of 20 should be added to a header and (if necessary) source file so it is available to all files that include it. How should this be implemented where it will cause neither compile nor linker errors when compiling multiple object files together? Assume that a header guard and #include is already present in the header (though not shown in the answers), and that C++11 is enabled.

In header: extern std::atomic x(20);

In header: extern std::atomic x; In source: std::atomic x(20);

In header: extern std::atomic x; In source: std::atomic x = 20;

In header: std::atomic x = 20;

In header: extern std::atomic x; In source: extern std::atomic x(20);

Answer

Correct Answer: In header: extern std::atomic x; In source: std::atomic x(20);

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489. What is the purpose of std::set_union?

Sets a value to the value of a union.

Constructs an unsorted union of the elements from two ranges.

Assigns a value to a union.

Constructs a sorted union of the elements from two ranges.

Assigns one union to another union.

Answer

Correct Answer: Constructs a sorted union of the elements from two ranges.

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490. What will be the output? auto fn = [](unsigned char a){ cout << std::hex << (int)a << endl; }; fn(-1);

-1

Undefined

256

Answer

Correct Answer: ff

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491. Which of the following is not a member of std::weak_ptr?

template weak_ptr(weak_ptr const& r) noexcept;

template weak_ptr(shared_ptr const& r) noexcept;

constexpr weak_ptr() noexcept;

weak_ptr(T *r) noexcept;

Answer

Correct Answer: weak_ptr(T *r) noexcept;

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492. How do you declare a pointer where the memory location being pointed to cannot be altered, but the value being pointed to can?

const int * const x = &y;

const int *x = &y;

int * const x = &y;

const int const *x = &y;

int const *x = &y;

Answer

Correct Answer: int * const x = &y;

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493. std::function<int()> f; f(); f is not initialized. What exception is thrown, when you try to call it?

std::function_missing

std::function_not_initialized

std::bad_function_call

std::bad_function

Answer

Correct Answer: std::bad_function_call

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494. Given this code, what is the output? #include struct shape { void move() { std::cout << "shape::move\n"; } }; struct circle : public shape { void move() { std::cout << "circle::move\n"; } }; struct rectangle : public shape { void move() { std::cout << "rectangle::move\n"; } }; int main() { shape *s; s = new shape(); s->move(); s = new circle(); s->move(); s = new rectangle(); s->move(); return 0; }

Overriding functions without virtual is not allowed.

shape::move circle::move rectangle::move

shape::move shape::move shape::move

Answer

Correct Answer: shape::move shape::move shape::move

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495. const std::string * s; std::string const * g; What can be said about s and g?

s is an immutable pointer to a modifiable string g is a modifiable pointer to an immutable string

s is a modifiable pointer to an immutable string g is an immutable pointer to an immutable string

s is a modifiable pointer to an immutable string g is an immutable pointer to a modifiable string

both s and g are modifiable pointers to an immutable string

Answer

Correct Answer: both s and g are modifiable pointers to an immutable string

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496. Which of the following operators can you not overload?

[]

. (dot)

, (comma)

()

Answer

Correct Answer: . (dot)

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497. What will be the output of the following C++ code ? #include class A { int a; public: void foo() {std::cout<<"foo";} }; int main() { A* trial=nullptr; trial->foo(); }

It's an incorrect program and causes segmentation fault.

foo

It's an incorrect program and can't be compiled either.

Answer

Correct Answer: foo

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498. What is the output of the following program? template void foo(U&, T&) { std::cout << "first"; } template void foo(int&, const T&) { std::cout << "second"; } int main() { int a; double g = 2.; foo(a, g); return 0; }

compile error: ambiguous call

first

second

Answer

Correct Answer: first

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499. The value of "(sizeof(short) == sizeof(int) && sizeof(int) == sizeof(long))" is

implementation defined

compiler error

false

true

Answer

Correct Answer: implementation defined

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500. class A { int x; protected: int y; public: int z; }; class B: public virtual A { }; What is the privacy level of B::x?

private

B does not inherit access to x from A.

public

protected

Answer

Correct Answer: B does not inherit access to x from A.

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501. bool is_even(int i) { return i % 2 == 0; } int v[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; std::partition(v, v + 10, is_even); What is the content of array v?

0,1,2,3,4,5,6,7,8,9

9,8,7,6,5,4,3,2,1

std::partition() doesn't work with plain arrays.

9,1,7,3,5,4,6,2,8,0

0,8,2,6,4,5,3,7,1,9

Answer

Correct Answer: 0,8,2,6,4,5,3,7,1,9

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502. Which function always returns an rvalue reference from "x", which can be used to indicate the object is going to be destroyed soon?

std::xvalue(x)

std::move(x)

std::shift(x)

std::destroy(x)

Answer

Correct Answer: std::move(x)

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503. std::vector<int> v(10); std::iota(v.begin(), v.end(), 10); What is the content of vector v?

1,2,3,4,5,6,7,8,9,10

10,11,12,13,14,15,16,17,18,19,20

1,2,3,4,5,6,7,8,9

10,11,12,13,14,15,16,17,18,19

Answer

Correct Answer: 10,11,12,13,14,15,16,17,18,19

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504. What is the output of the following program? int a, b = 3; const int& ar[]= {a, b}; ar[0] = 2; std::cout << ar[0];

no output; program is ill-formed

Answer

Correct Answer: no output; program is ill-formed

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505. What is value of x, if sizeof(int) == 4? unsigned int a = 0x98765432; unsigned int x = a >> 33;

0x98765432

This is undefined behavior

0x4C3B2A19

Answer

Correct Answer: This is undefined behavior

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506. class foo { foo(){}; }; class boo : public foo { boo() : foo() {}; }; which standard allows compilation of this code.

none, the code wont compile

c++11

c++03

c++98

c++0x

Answer

Correct Answer: none, the code wont compile

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507. Is it possible to create class instance placed at a particular location in memory?

Only by dirty hack with reinterpret_cast.

No. Only allocation on stack or in dynamic memory is allowed.

Yes, placement new does this.

Answer

Correct Answer: Yes, placement new does this.

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508. int a[] {1, 2, 3}; a[[] { return 2; }()] += 2; What is the value of a[2]?

Undefined behavior

Compile error: malformed attribute.

Answer

Correct Answer: Compile error: malformed attribute.

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509. What is the output of the following program? #include #include int main () { std::vector int_values {3}; for (auto const& vv: int_values) { std::cout << vv; } }

None of these

333

Program fails during compilation

000

Answer

Correct Answer: 3

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510. According to the C++ standard, what is sizeof(void)?

It depends on the host computer's word size.

Nothing, void doesn't have a size.

Answer

Correct Answer: Nothing, void doesn't have a size.

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511. What is the guaranteed complexity of std::push_heap?

O(log(n))

O(n)

O(n^2)

O(1)

Answer

Correct Answer: O(log(n))

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512. What is the below code? struct code { unsigned int x: 4; unsigned int y: 4; };

A struct declaration with 2 arrays of int.

A bit field structure declaration.

A struct with in place initialization of its members.

Invalid C++ code.

A bit selector declaration.

Answer

Correct Answer: A bit field structure declaration.

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513. std::tuple person{"John Doe", 42}; std::cout << std::get<1>(person); What is the output?

Compile error

John Doe

Answer

Correct Answer: 42

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514. What is the type being defined here: typedef A (B::*C)(D, E) const;

A is defined to be a constant function in namespace B taking arguments of types D and E, returning a pointer to type C.

C is defined to be a constant member function pointer of class B taking arguments of types D and E, returning type A.

B is defined to be a class containing a constant member function called A, taking arguments of types D and E, returning a pointer to type C.

Answer

Correct Answer: C is defined to be a constant member function pointer of class B taking arguments of types D and E, returning type A.

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515. enum { a, b, c = b + 2 }; What is the value of c?

Compile error.

Answer

Correct Answer: 3

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516. Where T is a type: std::vector<T>::at vs std::vector<T>::operator[]:

at is always bounds checked. operator[] is not.

at is not always bounds checked. operator[] is.

at is equivalent to operator[]

Answer

Correct Answer: at is always bounds checked. operator[] is not.

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517. Which is NOT a valid hash table provided by the STL?

hash_multiset

hash_set

hash_table

hash_map

hash_multimap

Answer

Correct Answer: hash_table

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518. Will the code below compile without error? struct c0 { int i; c0(int x) { i = x; } }; int main() { c0 x1(1); c0 x2(x1); return 0; }

No. The constructor is not public.

No. c0 x2 ( x1 ) will return error.

No. struct types do not have constructors.

Yes.

Answer

Correct Answer: Yes.

Note: This Question is unanswered, help us to find answer for this one

519. What is the output of the following code? int a=8; for(int i=1; i<=i*3; i++) n++;

Depend upon the Execution.

Infinite loop.

Finite loop.

All are wrong

Answer

Correct Answer: Infinite loop.

Note: This Question is unanswered, help us to find answer for this one

520. Given: union a { int x; short y; }; a var[20]; How many bytes of memory does var occupy?

This is invalid C++ code

Depends

120

Answer

Correct Answer: Depends

Note: This Question is unanswered, help us to find answer for this one

521. What is a key difference between a struct and union in terms of memory size?

A union is the size of whichever data member is initialized whereas the size of a struct is the sum of the size of the struct data members

A union is the size of its largest data member whereas the size of a struct is the sum of the size of the struct data members

No difference; they are the sum of the sizes of their respective data members

A union is the size of its largest data member whereas the size of a struct is at least the sum of the size of the struct data members

Answer

Correct Answer: A union is the size of its largest data member whereas the size of a struct is at least the sum of the size of the struct data members

Note: This Question is unanswered, help us to find answer for this one

522. If you do not supply any constructors for your class, which constructor(s) will be created by the compiler?

Copy Constructor

Default constructor

Both of these

Answer

Correct Answer: Both of these

Note: This Question is unanswered, help us to find answer for this one

523. class A { int x; protected: int y; public: int z; }; class B: private A { }; What is the privacy level of B::z?

protected

public

B does not inherit access to z from A.

private

Answer

Correct Answer: private

Note: This Question is unanswered, help us to find answer for this one

524. What is the value of 10.10 % 3?

1.0

3.03

1.01

None, that is an invalid mix of types.

Answer

Correct Answer: None, that is an invalid mix of types.

Note: This Question is unanswered, help us to find answer for this one

525. What is the value of x after the following code: int x = 0; if (x = 1) { x = 2; } else { x = 1; }

The code will not compile

Answer

Correct Answer: 2

Note: This Question is unanswered, help us to find answer for this one

526. Which one is theorically faster ?

++i

i++

Both are equally fast.

Answer

Correct Answer: ++i

Note: This Question is unanswered, help us to find answer for this one

527. What type of exceptions can the following function throw: int myfunction (int a);?

All

Standard

None

Answer

Correct Answer: All

Note: This Question is unanswered, help us to find answer for this one

528. Which of the following is a potential side-effect of inlining functions?

C++ standard guarantees that inlining does not result in any adverse side-effects

The size of program's stack segment increases

The size of the compiled binary increases

The size of program's heap segment increases

Answer

Correct Answer: The size of the compiled binary increases

Note: This Question is unanswered, help us to find answer for this one

529. String literals can extend to more than a single line of code by putting which character at the end of each unfinished line?

a newline (\n)

a tab (\t)

a backslash (\)

Answer

Correct Answer: a backslash (\)

Note: This Question is unanswered, help us to find answer for this one

530. How would you access "blue" in the "color" enum class? enum class color { red, blue, green };

blue

color.blue

color[1]

color::blue

Answer

Correct Answer: color::blue

Note: This Question is unanswered, help us to find answer for this one

531. What is the data range for an unsigned integer value in C++ on a system where ints are 32 bits?

0 to 2,147,483,647

0 to 65,535

0 to 4,294,967,295

0 to 255

Answer

Correct Answer: 0 to 4,294,967,295

Note: This Question is unanswered, help us to find answer for this one

532. Is the following legal C++ code? | char *str = "abc" + "def";

No.

Yes.

Yes, but only if you #include first.

No, you need to add "const" before "char".

Answer

Correct Answer: No.

Note: This Question is unanswered, help us to find answer for this one

533. An anonymous namespace is used to...

nest namespaces

support closures

prevent external access to declarations local to a compilation unit

disambiguate declarations from other namespaces

Answer

Correct Answer: prevent external access to declarations local to a compilation unit

Note: This Question is unanswered, help us to find answer for this one

534. Which of the following calls method foo() from the parent class Parent of the current class?

this->parent->foo();

Parent.foo();

Parent::foo();

Parent instance; instance.foo;

Answer

Correct Answer: Parent::foo();

Note: This Question is unanswered, help us to find answer for this one

535. A void pointer is a special type of pointer which indicates the...

absence of a type for the pointer.

none of these

pointer has a NULL value.

Answer

Correct Answer: absence of a type for the pointer.

Note: This Question is unanswered, help us to find answer for this one

536. Which of the following statements uses a Lambda expression?

std::regex e ("\\b(sub)([^ ]*)");

int (*minus)(int, int) = subtract;

bool is_odd = [](int n) {return n%2==1;};

Answer

Correct Answer: bool is_odd = [](int n) {return n%2==1;};

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537. Which operator cannot be overloaded by a class member function?

[]

Answer

Correct Answer: ?

Note: This Question is unanswered, help us to find answer for this one

538. Suppose int * a = new int[3]; How would you deallocate the memory block pointed by a?

delete a[3];

delete[] a;

delete a;

delete a[];

delete[3] a;

Answer

Correct Answer: delete[] a;

Note: This Question is unanswered, help us to find answer for this one

539. What is the time complexity of delete the first variable in a deque object (e.g., deque<int> a;)?

O(n/2)

O(logn)

O(n)

O(1)

Answer

Correct Answer: O(1)

Note: This Question is unanswered, help us to find answer for this one

540. What is a virtual function in C++?

A class member function that you expect to be redefined in derived classes.

A class member function that must be redefined in derived classes.

A class member function which does not need to be defined in the base class.

Answer

Correct Answer: A class member function that you expect to be redefined in derived classes.

Note: This Question is unanswered, help us to find answer for this one

541. What does the "explicit" keyword do?

It prevents a single-argument constructor from being used in an implicit conversion

It requires a variable to reside in main memory instead of a processor's cache

It makes the declaration of a default constructor mandatory

Answer

Correct Answer: It prevents a single-argument constructor from being used in an implicit conversion

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542. int *array = new int[10]; delete array;

This code will correctly free memory

This code has undefined behavior

Answer

Correct Answer: This code has undefined behavior

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543. Which C++ keyword allows the compiler to determine the type of a variable by the value used to initialized it?

auto

var

abstract

virtual

Answer

Correct Answer: auto

Note: This Question is unanswered, help us to find answer for this one

544. Thinking about data members and addressable memory, how are a struct, class and union different?

No difference, all three are allocated memory sequentially

There is no difference, all three are allocated memory randomly

Union and class data members are allocated in memory sequentially whereas struct data members are allocated memory randomly

Struct and class data members are allocated in memory sequentially whereas a union is allocated memory randomly

Struct and class data members are allocated in memory sequentially whereas a union is allocated enough memory for the largest data member only

Answer

Correct Answer: Struct and class data members are allocated in memory sequentially whereas a union is allocated enough memory for the largest data member only

Note: This Question is unanswered, help us to find answer for this one

545. What is the data type for the following: L"Hello World"?

an integer string

a string

a wide character string

Answer

Correct Answer: a wide character string

Note: This Question is unanswered, help us to find answer for this one

546. Which class(es) can be used to perform both input and output on files in C++?

ofstream

fstream

ifstream

All of the answers are correct.

Answer

Correct Answer: fstream

Note: This Question is unanswered, help us to find answer for this one

547. Which of the following rules apply to operator overloading in C++?

Both of the other answers are correct.

Cannot redefine the meaning of built in types

Cannot have default arguments

Answer

Correct Answer: Both of the other answers are correct.

Note: This Question is unanswered, help us to find answer for this one

548. In C++, what is the difference between these two declarations: void foo(); void foo(void);

The second one is illegal.

The first one is illegal.

None, they are equivalent.

One of them takes no value, the other takes any value.

Answer

Correct Answer: None, they are equivalent.

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549. What is the size of the character array which would hold the value "Helloo"?

Answer

Correct Answer: 7

Note: This Question is unanswered, help us to find answer for this one

550. Which of these is a difference between struct and class types?

No difference.

There are no inheritances with structs. Classes may be derived.

Structs only allow variable definitions. Classes also allow function definition.

Structs have public privacy by default, classes use private.

Answer

Correct Answer: Structs have public privacy by default, classes use private.

Note: This Question is unanswered, help us to find answer for this one

551. Define a way other than using the keyword inline to make a function inline

The function must be defined as the friend function.

The function must be defined inside the class.

The function must be defined outside the class.

Answer

Correct Answer: The function must be defined inside the class.

Note: This Question is unanswered, help us to find answer for this one

552. True or False: A class that has a pure virtual method can be instantiated.

True

False

Answer

Correct Answer: False

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553. What is the value of 2--2?

Nothing, that is not a valid C++ expression.

-2

Answer

Correct Answer: Nothing, that is not a valid C++ expression.

Note: This Question is unanswered, help us to find answer for this one

554. Where does the compiler first look for file.h in the following directive: #include "file.h" ?

In all directories specified by the PATH environment variable on the machine.

In the default directories where it is configured to look for the standard header files

The same directory that includes the file containing the directive.

Answer

Correct Answer: The same directory that includes the file containing the directive.

Note: This Question is unanswered, help us to find answer for this one

555. std::vector<int> foo(5);

Initializes a vector with 5 elements of value 0.

Initializes a vector with an element with the value 5.

Answer

Correct Answer: Initializes a vector with 5 elements of value 0.

Note: This Question is unanswered, help us to find answer for this one

556. Within a class declaration, the statement "virtual int foo() = 0;" does what?

Declares a volatile virtual function.

Declares a pure virtual function.

Causes a compiler error.

Declares a default virtual function.

Answer

Correct Answer: Declares a pure virtual function.

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557. Given this code, what is the output? #include struct shape { virtual void move() { std::cout << "shape::move\n"; } }; struct circle : public shape { void move() { std::cout << "circle::move\n"; } }; struct rectangle : public shape { void move() { std::cout << "rectangle::move\n"; } }; int main() { shape *s; s = new shape(); s->move(); s = new circle(); s->move(); s = new rectangle(); s->move(); return 0; }

rectangle::move circle::move shape::move

Compile error

Runtime error

shape::move shape::move shape::move

shape::move circle::move rectangle::move

Answer

Correct Answer: shape::move circle::move rectangle::move

Note: This Question is unanswered, help us to find answer for this one

558. What does the line: #include <iostream> mean in a C++ program?

It tells the program to include the standard library header files.

It tells the preprocessor to include the iostream standard file.

It tells the preprocessor to include the iostream standard file only if it it required by the program.

Answer

Correct Answer: It tells the preprocessor to include the iostream standard file.

Note: This Question is unanswered, help us to find answer for this one

559. Which of the following is a valid variable identifier in C++?

m_test

1_str

class

Answer

Correct Answer: m_test

Note: This Question is unanswered, help us to find answer for this one

560. Defined data types (typedef) allow you to create...

different types in C++.

alternate names for existing types in C++.

Answer

Correct Answer: alternate names for existing types in C++.

Note: This Question is unanswered, help us to find answer for this one

561. A structure item exists in your code with an integer member units. You have the following variable declaration: item * myItem;. How do you access the value of units?

*(myItem.units)

myItem->units

myItem.units

Answer

Correct Answer: myItem->units

Note: This Question is unanswered, help us to find answer for this one

562. Which of the following is not a specific type casting operator in the C++ language?

dynamic_cast

reinterpret_cast

unknown_cast

const_cast

Answer

Correct Answer: unknown_cast

Note: This Question is unanswered, help us to find answer for this one

563. Consider this code fragment: a = 25; b = &a; What does b equal?

value contained in the address of a

address of a

Answer

Correct Answer: address of a

Note: This Question is unanswered, help us to find answer for this one

564. Which of the following can cause a memory corruption error?

Freeing memory which has already been freed.

All of these

Using an address before memory is allocated and set.

Answer

Correct Answer: All of these

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565. What will 'int a = 'a';' do?

It will declare a new variable a and set it to 97 (assuming a machine that uses ASCII).

It will declare a new variable a and set it to its previous value.

It will cause an infinite loop.

Nothing, it is an error and won't compile.

Answer

Correct Answer: It will declare a new variable a and set it to 97 (assuming a machine that uses ASCII).

Note: This Question is unanswered, help us to find answer for this one

566. std::vector<int> v(4); std::fill(v.begin(), v.end(), 4); What is the content of vector v?

4,4,4,4

0,1,2,3

4,5,6,7

1,2,3,4

Answer

Correct Answer: 4,4,4,4

Note: This Question is unanswered, help us to find answer for this one

567. True or False: In C++, a comment can only be specified with a leading //.

True

False

Answer

Correct Answer: False

Note: This Question is unanswered, help us to find answer for this one

568. What is the difference between a class and a struct

You can declare functions in a class, you cannot declare functions in a struct.

They are the same.

You cannot overload an operator in a struct.

The members of a class are private by default, and the members of a struct are public by default.

Answer

Correct Answer: The members of a class are private by default, and the members of a struct are public by default.

Note: This Question is unanswered, help us to find answer for this one

569. What does the sizeof(arg) operator do?

returns the maximum value of arg

returns the size in bytes of arg

returns the length in characters of arg

Answer

Correct Answer: returns the size in bytes of arg

Note: This Question is unanswered, help us to find answer for this one

570. Classes can contain static member variables which are global to the class and...

none of these

can be accessed by all objects of the same class.

their values will change for each object of the same class.

Answer

Correct Answer: can be accessed by all objects of the same class.

Note: This Question is unanswered, help us to find answer for this one

571. Which is(are) an example(s) of valid C++ function prototype(s)?

int myFunction( int a, int b);

all of these

int myFunction(int, int);

Answer

Correct Answer: all of these

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572. What is an advantage to using C++ Templates?

reduce code duplication

templates are typesafe

all of these

increase code flexibility

Answer

Correct Answer: all of these

Note: This Question is unanswered, help us to find answer for this one

573. Can constructors be overloaded?

Yes

Depends on the situation.

Answer

Correct Answer: Yes

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574. The printmsg function does not require any arguments. Choose the statement which calls the function.

printmsg();

void printmsg();

printmsg;

Answer

Correct Answer: printmsg();

Note: This Question is unanswered, help us to find answer for this one

575. In the following line of C++ code, int foo[50]; what does the number 50 represent?

The maximum integer value that can be placed in the array.

The initial value of the first array element.

The number of integer elements the array shall hold.

Answer

Correct Answer: The number of integer elements the array shall hold.

Note: This Question is unanswered, help us to find answer for this one

576. What is the value of i after the following statement(s)? int i (4.36);

4.36

4.4

Answer

Correct Answer: 4

Note: This Question is unanswered, help us to find answer for this one

577. In C++, a single line comment needs to be begun with

a leading //.

all of these

a leading /**.

Answer

Correct Answer: a leading //.

Note: This Question is unanswered, help us to find answer for this one

578. What does the following statement mean? const int a = 50;

The value of a cannot change from 50.

The initial value of a is 50 but you can change it.

none of these

Answer

Correct Answer: The value of a cannot change from 50.

Note: This Question is unanswered, help us to find answer for this one

579. A void pointer is a special type of pointer which indicates the absence of a type for the pointer.

True

False

Answer

Correct Answer: True

Note: This Question is unanswered, help us to find answer for this one

580. Which is a valid comment statement in C++?

Both of these

/* this is a comment */

// this is a comment

Answer

Correct Answer: Both of these

Note: This Question is unanswered, help us to find answer for this one

581. Which statement assigns to variable a the address of variable b?

a = b;

a = &b;

a = *b;

Answer

Correct Answer: a = &b;

Note: This Question is unanswered, help us to find answer for this one

582. Which of the following is a reserved word in C++?

CHAR

char

character

Char

Answer

Correct Answer: char

Note: This Question is unanswered, help us to find answer for this one

583. Choose the function declaration which you would use if you did not need to return any value.

myfunction(void)

void myfunction()

myfunction()

Answer

Correct Answer: void myfunction()

Note: This Question is unanswered, help us to find answer for this one

584. Which of the following statements tests to see if the sum is equal to 10 and the total is less than 20, and if so, prints the text string "incorrect."?

None of these options

if( (sum == 10) || (total < 20) )printf(

if( (sum == 10) && (total < 20) )printf(

ctrl+alt+del

Answer

Correct Answer: if( (sum == 10) && (total < 20) )printf(

Note: This Question is unanswered, help us to find answer for this one

585. Which of the following is not a C++ primitive type?

int

real

float

double

Answer

Correct Answer: real

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586. Which of the following operators below allow you to define the member functions of a class outside the class?

Answer

Correct Answer: ::

Note: This Question is unanswered, help us to find answer for this one

587. Which of the following is not a fundamental data type in C++?

char

wide

bool

Answer

Correct Answer: wide

Note: This Question is unanswered, help us to find answer for this one

588. Which of the following is not a loop structure?

stop when loop

do while loop

for loop

Answer

Correct Answer: stop when loop

Note: This Question is unanswered, help us to find answer for this one

589. How do you declare an integer variable x in C++?

declare x as integer;

int x;

x int;

int<x>;

x is integer;

Answer

Correct Answer: int x;

Note: This Question is unanswered, help us to find answer for this one

590. Which of the following is a valid C++ function declaration which does not return a value?

int myFunction( int a, int b)

myFunction( int a, int b)

void myFunction( int a, int b)

Answer

Correct Answer: void myFunction( int a, int b)

Note: This Question is unanswered, help us to find answer for this one

591. C++ statements are separated by this symbol:

Hash symbol (#)

Colon (:)

Semi-colon (;)

Addition sign (+)

Answer

Correct Answer: Semi-colon (;)

Note: This Question is unanswered, help us to find answer for this one

592. Which of the following is a valid variable declaration statement?

int a; b; c;

int a, b, c;

int a:

Answer

Correct Answer: int a, b, c;

Note: This Question is unanswered, help us to find answer for this one

593. If you have two different C++ functions which have the same name but different parameter types, it is called...

inline functions.

recursive functions.

function overloading.

Answer

Correct Answer: function overloading.

Note: This Question is unanswered, help us to find answer for this one

594. std::make_heap() converts a range into a heap and std::sort_heap() turns a heap into a sorted sequence.

true

false

Answer

Correct Answer: true

Note: This Question is unanswered, help us to find answer for this one

595. struct A { int n; }; A a; What is the visibility of a.n?

private

protected

public

Visibility is defined for classes only.

Answer

Correct Answer: public

Note: This Question is unanswered, help us to find answer for this one

596. What is output of following program? #include <iostream> int main() { double x = 1.0; for(int i = 0; i < 3; ++i) x = 0.1; std::cout << x 1e3 - 1; }

Always 0.

It's depend of double implementation, usually not exactly zero.

Always not 0.

Answer

Correct Answer: It's depend of double implementation, usually not exactly zero.

Note: This Question is unanswered, help us to find answer for this one

597. What does OOD stand for?

Operating on Objects in Design

Object-Oriented Design

Overly Objective Design

Object-oriented database

Answer

Correct Answer: Object-Oriented Design

Note: This Question is unanswered, help us to find answer for this one

C++ MCQs | Topic-wise

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1. The ____________________ of relational and logical operators is said to be from left to right.

2. Closing a file causes any unsaved information still held in the file buffer to be ________.

3. Consider the following statement: double alpha[10][5];. the number of components of alpha is ____.

4. The ________ sort usually performs fewer exchanges than the ________ sort.

5. An array's size declarator must be a(n)________ with a value greater than ________.

6. An array can easily be stepped through by using a ________.

7. A(n) ____________________ is a memory location whose contents can be changed.

8. Every byte in the computer's memory is assigned a unique ________.

9. In c++, you can create aliases to a previously defined data type by using the ____ statement.

10. A variable's ________ is the part of a program in which the variable may be accessed.

11. A ____ structure is also referred to as a loop.

12. ________ to a base class may be assigned the address of a derived class object.

13. ________ must be included in a program in order to use the cout object.

14. _______ is a construct that defines objects of the same type.

15. A(n) ________ is a variable, usually a bool, that signals when a condition exists.

16. The do-while loop is considered a(n) _________ loop.

17. Which statement is true when declaring the member variable count as static? class my_class{ public: static int count;};

18. What is this expression equivalent to?

19. Which choice is a reason to specify the type of a pointer instead of using void *, which works as a pointer ro any type?

20. Other than shifting bits to the left, what is the << oprator used for ?

22. What is a variable of type double?

23. What is the purpose of this line in a header file? #pragma once

24. What is one benefit of declaring the parameter as a const reference instead of declaring it as a regular object? int median(const my_array& a)

25. What is the main difference between these two Functions? std::mutex::lock() Std::mutex::try_lock()

26. What is the purpose of a destructor?

27. Consider a class named CustomData. Which choice is a correct declaration syntax to overload the postfix ++ operator as a class member?

28. What does this function do? auto buff = new char[50]; Std::memset(buff,20,50);

29. What is this expression equivalent to? A->B->C->D

30. What is an appropriate way of removing my_object as shown below? my_class *my_object = new my_class();

31. What is the assumed type of a constant represented in the source code as 0.44?

32. Which of the following is not a consequence of declaring the member variable count of my_class as static? class my_class { public: static int count;}

33. What would be the output of this code? int32_t nums[3]={2,4,3}; std::cout << ( nums[0] << nums[1] << nums[2] );

34. What's wrong with this definition when using a pre-C++11 compiler?

35. What does this part of a main.cpp file do? #include "library.h"

36. How can C++ code call a C function?

37. What is the .* operator and what does it do?

38. Which statement is true?

39. What is the difference between a public and a private class member?

40. What is the output of this code? printf("1/2 = %f",(float)(1/2));

41. What is the output of this code? int c=3; char d='A'; std::printf("c is %d and d is %c",c,d);

42. What is true about the variable named ptr? void *ptr;

43. What is the meaning of the three sections specified between parentheses in a for loop separated by semicolons?

44. What is the meaning of the two parts specified between parentheses in a range-based for loop, separated by a colon?

45. What is the ternary operator equivalent to this code snippet? if(x) y=a; else y=b;

46. A class template is a _?

47. What does auto type specifier do in this line of code (since C++11)? auto x = 4000.22;

48. What is an lvalue?

49. Which of the following is not a difference between a class and a struct?

50. Which of the following operators is overloadable?

51. What's a benefit of declaring the parameter as a const reference instead of declaring it as a regular object? int median(const my_array& a);

52. Which of the following is a true statement about the difference between pointers and iterators?

53. Which of the following is a reason why using this line is considered a bad practice? (Alternative: Why is using this line considered a bad practice?) Using namespace std;

54. A variable listed in a header is known as a(n) ____ parameter.

55. A for loop is considered a(n) ________ loop.

56. A ______ is a symbol used to represent a location in memory.

57. In c++, :: is called the scope ____ operator.

58. Each node of a singly linked list has two components: ____ and ____.

59. Dynamic memory allocation occurs ________.

60. Another term for repetition structures is __________

61. _____ are programs that test code to ensure that it contains no syntax errors.

62. You can use the ____ operator to increment or decrement the value of an enumeration type.

63. When you write a program that stores a value in a variable, you are using ____ storage.

64. Data types that are created by the programmer are known as ________.

65. Data sent by a program to the screen, a printer, or a file is __________.

66. An example of a floating point data type is ____.

67. In c++, ____ is called the scope resolution operator.

68. ________ members of a base class are never accessible to a derived class.

69. ________ are data items whose values cannot change while the program is running.

70. When the ________ is placed in front of a variable name, it returns the address of that variable.

71. When ____ are introduced in a program, they are immediately given a value.

72. The class dclass is derived from the class bclass using the ____ type of inheritance.

73. The class ____ is the base of the classes designed to handle exceptions.

74. The ____ operator can be used to return the address of a private data member of a class.

75. The ____ loop provides three actions in one compact statement.

76. Objects both in the real world and in object-oriented programming contain ____ and methods.

77. Object-oriented programmers sometimes say an object is one ____ of a class.

78. In some programming languages, ___________ are implemented as arrays whose elements are characters.

79. Classes can create new classes from existing classes. this important feature ____.

80. A ________ search uses a loop to sequentially step through an array.

4. The sort usually performs fewer exchanges than the sort.

5. An array's size declarator must be a(n) with a value greater than .

58. Each node of a singly linked list has two components: and .

100. A(n) search is more efficient than a(n) search

111. The sort usually performs more exchanges than the sort.

115. A sorting algorithm can be used to arrange a set of in order.

128. A _ is a member function that is automatically called when a class object is _.

141. Arrays may be at the time they are .