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Basic C Programming MCQ

1. When a structure is passed ________ to a function, its members are not copied.

By reference

By value

Both A and B

Neither of these

Answer

Correct Answer: By reference

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2. If a condition in a post-test loop can never be met, the loop is an _________ loop.

Infinite loop

Finite loop

Pre-test loop

None of these

Answer

Correct Answer: Infinite loop

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

Curly brackets

Square brackets

A dot

A comma

Answer

Correct Answer: Square brackets

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4. The dynamic memory allocation functions are defined in which system header file ?

Stdio.h

Stdlib.h

Limits.h

Stddef.h

Answer

Correct Answer: Stdlib.h

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5. Void pointer vptr is assigned the address of float variable g. What is a valid way to dereference vptr to assign its pointed value to a float variable named f later in the program? float g; void *vptr=&g;

F=(float *)vptr;

F=_(float _)vptr;

F=*(float)vptr;

F=(float)*vptr;

Answer

Correct Answer: F=_(float _)vptr;

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6. What does the ctype tolower() function do?

It returns TRUE for lowercase letters of the alphabet.

It ensures that text output uses only ASCII values (0 through 127).

It returns FALSE for lowercase letters of the alphabet.

It converts an uppercase letter of the alphabet to lowercase.

Answer

Correct Answer: It converts an uppercase letter of the alphabet to lowercase.

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7. What standard data type provides the smallest storage size and can be used in computations?

Char

Float

Int

Short

Answer

Correct Answer: Char

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8. What is the member access operator for a structure?

[]

Answer

Correct Answer: .

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9. What is not one of the basic data types in C

Long double

Unsigned char

Array

Float

Answer

Correct Answer: Array

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10. Which line of code, after execution, results in i having the value of 1?

For(i=1; i<=1; i++);

For(i=1; i=10; i++);

For(i=1; i==10; i++);

For(i=10; i>=1; i--);

Answer

Correct Answer: For(i=1; i==10; i++);

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11. Which is not a storage class specifier?

Intern

Extern

Static

Answer

Correct Answer: Intern

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12. Which operator is used to access the address of a variable?

Answer

Correct Answer: &

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13. Describe the relationship between lvalue and rvalue.

An lvalue may appear only on the left-hand side of an assignment; an rvalue may appear only on the right-hand side.

An lvalue may appear only on the left-hand side of an assignment; an rvalue may appear on either the left-hand or right-hand side.

An lvaue and an rvalue may appear on either left-hand or right-hand side of an assignment.

An lvalue may appear on the left-hand or right-hand side of an assignment; an rvalue may appear only on the right-hand side.

Answer

Correct Answer: An lvalue may appear on the left-hand or right-hand side of an assignment; an rvalue may appear only on the right-hand side.

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14. A Stack data structure allows all data operations at one end only, making it what kind of an implementation?

FIFO

LIFO

LILO

LOLI

Answer

Correct Answer: LIFO

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15. By default, C Functions are what type of functions?

Global

Static

Library

System

Answer

Correct Answer: Library

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16. The main loop structures in C programming are the for loop, the while loop, and which other loop?

Do...while

For...in

Repeat...until

Do...until

Answer

Correct Answer: Do...while

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17. Directives are translated by the?

Pre-processor

Compiler

Linker

Editor

Answer

Correct Answer: Pre-processor

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18. File input and output (I/O) in C is done through what?

Syntax-driven components

Native interfaces

System objects

Function calls

Answer

Correct Answer: Function calls

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19. What does the strcmp(str1, str2); function return?

0 if str1 and str2 are the same, a negative number if str1 is less than str2, a positive number if str1 is greater than str2

True (1) if str1 and str2 are the same, false (0) if str1 and str2 are not the same

True (1) if str1 and str2 are the same, NULL if str1 and str2 are not the same

0 if str1 and str2 are the same, a negative number if str2 is less than str1, a positive number if str2 is greater than str1

Answer

Correct Answer: 0 if str1 and str2 are the same, a negative number if str1 is less than str2, a positive number if str1 is greater than str2

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20. File input and output (I/O) in C is heavily based on the way it is done ___?

In Unix

In C++

In C#

In DOS

Answer

Correct Answer: In Unix

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21. Compile time errors are static errors that can be found where in the code?

In declarations and definitions

In functions and expressions

In syntax and semantics

In objects and statements

Answer

Correct Answer: In declarations and definitions

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22. What is an alternative way to write the expression (*x).y?

There is no equivalent.

X->y

*x->y

Y->x

Answer

Correct Answer: X->y

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23. What is the expression player->name equivalent to?

Player.name

(\*player).name

\*player.name

Player.\*name

Answer

Correct Answer: (\*player).name

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24. What is not a valid command with this declaration? char *string[20] = { "one", "two", "three"};

printf("%c", string[1][2]);

printf("%s", string[1][2]);

printf("%s", string[1]);

Printf(string[1]);

Answer

Correct Answer: printf("%s", string[1][2]);

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25. What is the difference between scanf() and sscanf() functions?

The scanf() function reads data formatted as a string; The sscanf() function reads string input from the screen.

The scanf() function reads formatted data from the keyboard; The sscanf() function reads formatted input from a string.

The scanf() function reads string data from the keyboard; The sscanf() function reads string data from a string.

The scanf() function reads formatted data from a file; The sscanf() function reads input from a selected string

Answer

Correct Answer: The scanf() function reads formatted data from the keyboard; The sscanf() function reads formatted input from a string.

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26. A union allows you to store different _ in the same _.

Objects; Structure

Variables; Declaration

Data types; Memory space

Arrays; Header file

Answer

Correct Answer: Data types; Memory space

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27. By default c uses the call by value method to pass arguments to functions. How can you invoke the call by reference method?

By using pointers

By declaring functions separately from defining them

By using recursive functions

By using global variables

Answer

Correct Answer: By using pointers

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28. When is memory for a variable allocated?

During the assigment of the variable

During the initialization of the variable

During the declaration of the variable

During the definition of the variable

Answer

Correct Answer: During the declaration of the variable

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29. In C language what are the basic building blocks that are constructed together to write a program?

Keywords

Identifiers

Tokens

Functions

Answer

Correct Answer: Tokens

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30. Which function do you use to deallocate memory?

Dalloc()

Dealloc()

Release()

Free()

Answer

Correct Answer: Free()

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31. In which segment does dynamic memory allocation takes place?

BSS Segment

Stack

Heap

Data segment

Answer

Correct Answer: Heap

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32. C treats all devices, such as the display and the keyboard, as files. Which files opens automatically when a program executes?

Stdout

Stdio.h

Default.h

String.h

Answer

Correct Answer: Stdout

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33. What is optional in a function declaration?

Data type of parameters

Return type of function

Parameter names

Number of parameters

Answer

Correct Answer: Parameter names

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34. In this code sample, what is not a problem for C compiler? main(){ constant int PI = 3.14; printf("%f\n", pi);}

The value of PI needs to be set to 3.141593, not 3.14

The declaration of PI needs to say const, not constant.

The data type of PI needs to be float not int.

The printf statement needs to use PI, not pi.

Answer

Correct Answer: The value of PI needs to be set to 3.141593, not 3.14

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35. What is not one of the reserved words in standard C?

Volatile

Typeof

Typedef

Answer

Correct Answer: Typeof

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36. A C header file is a file with extension .h that contains function declarations and macro definitons to be shared between several source files. Header files are listed using the preprocessing directive #include, and can have one of the following formats: #include or #include "fileB". What is the difference between these two formats?

The preprocessor will try to locate the fileA in same directory as the source file, and the fileB in a predetermined directory path.

The preprocessor will try to locate the fileA in the fixed system directory. It will try to locate fileB in the directory path designated by the -l option added to the command line while compiling the source code.

The file using fileA syntax must be system files, of unlimited number. fileB must be a user file at a maximun of one per source file.

The preprocessor will try to locate the fileA in a predetermined directory path. It will try to locate fileB in the same directory as the source file along with a custom directory path.

Answer

Correct Answer: The preprocessor will try to locate the fileA in a predetermined directory path. It will try to locate fileB in the same directory as the source file along with a custom directory path.

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37. A pointer to void named vptr, has been set to point to a floating point variable named g. What is the valid way to dereference vptr to assign its pointed value to a float variable named f later in this program? float g; void *vptr=&g;

F = _(float _)vptr;

F = (float *)vptr;

F = *(float *)vptr;

F = *(float)vptr;

Answer

Correct Answer: F = *(float *)vptr;

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38. What does the declaration of variable c2 demonstrate? main(){ char c1 ='a'; char c2 = c1+10;}

Character arithmetic

Undefined assignment

Type conversion

Invalid declaration

Answer

Correct Answer: Character arithmetic

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39. What is the name for calling a function inside the same function?

Recursion

Subfunction

Inner call

Infinite loop

Answer

Correct Answer: Recursion

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40. Each array element occupies an area in memory next to, or ____, the others.

Coupled with

Associated with

Contiguous to

Parallel with

Answer

Correct Answer: Contiguous to

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41. Many programming languages include a string operation called __________.

Concatenation

Character string

Initialized

Boolean

Answer

Correct Answer: Concatenation

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42. A(n) ____ loop executes a predetermined number of times.

Terminal

Definite

Indefinite

Infinite

Answer

Correct Answer: Definite

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43. 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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44. When an array is passed to a function, it is actually ________ the array that is/are passed.

A copy of all the values in

The value stored in the first element of

The starting memory address of

The data type and size of

None of the above

Answer

Correct Answer: The starting memory address of

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45. After a program is coded, it must be ____________.

Comments

Result

Tested

Step

Answer

Correct Answer: Tested

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

Infinite

Validate

Indent

Step

Answer

Correct Answer: Step

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47. Function strcmp returns __________ if its first argument is equal to its second argument.

Specifically 1

Any non-zero value (i.e., true)

Specifically 0

Any negative value

Answer

Correct Answer: Specifically 0

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48. Objects in an array are accessed with ________, just like any other data type in an array.

Subscripts

Dot operator

Structure

Data type

Answer

Correct Answer: Subscripts

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49. Common ides include visual studio and ____.

Marin Studio

Xain Studio

Eclipse

VxWorks

Answer

Correct Answer: Eclipse

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50. Pointers are variables that contain __________ as their values.

Strings

Flowlines

Memory addresses

Directions

Answer

Correct Answer: Memory addresses

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51. Functions that do not have a return type are called ____ functions.

Zero

Null

Void

Empty

Answer

Correct Answer: Void

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52. An inner loop goes through all of its iterations for every single iteration of the ________ loop.

True

False

Answer

Correct Answer: True

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53. A two-dimensional array contains two dimensions: ____.

Size and scope.

Breadth and height.

Height and width.

Depth and width

Answer

Correct Answer: Height and width.

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54. ________ is a construct that defines objects of the same type.

Inline function

Header file

Library function

Structure

Answer

Correct Answer: Inline function

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

One

Two

Two or more

None of these

Answer

Correct Answer: Two or more

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56. 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.

Answer

Correct Answer: Subtracts one from the value of its operand.

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

Remove

Swap

Cast

Using

Answer

Correct Answer: Cast

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59. With pointer variables, you can ________ manipulate data stored in other variables.

Never

Seldom

Indirectly

All of these

None of these

Answer

Correct Answer: Indirectly

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60. 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

None of these

Answer

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

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

-> operator

<> operator

Dot operator

& operator

None of these

Answer

Correct Answer: -> operator

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

Permanent

Ascending

Real-time

Temporary

Answer

Correct Answer: Temporary

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63. When a character is stored in memory, it is actually the ________ that is stored.

Unicode number

ASCII code

Loating-point value ASCII code

Letter

Answer

Correct Answer: Unicode number

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64. Value is a function of _ and _?

Perceived benefits, perceived price

Customers will buy more at every price point

Unit sales increase

An increase in price for the product

Answer

Correct Answer: Perceived benefits, perceived price

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65. Usually, when you create nested loops, each loop has its own ____.

Operands

Entrance condition

Entire loop must be executed

SUmmary Report

Answer

Correct Answer: Entrance condition

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66. Using the __________ cipher you choose some number by which to shift each letter of a text.

DC4

Caesar

Multi-alphabet substitution

ASCII 17

Answer

Correct Answer: Multi-alphabet substitution

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

None of these

Answer

Correct Answer:

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68. To use stream manipulators, you should include the ________ header file.

Stream.

Fstream.

Format.

Iomanip.

Iostream

Answer

Correct Answer: Iomanip.

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

File

Iostream

Fstream

Both A and B

Both B and C

Answer

Correct Answer: Fstream

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70. To create a macro, you can enter a series of commands in the _____ programming language.

VBA

Validation

Information

Trust

Answer

Correct Answer: VBA

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

By value

By reference

Index-wise

Member-wise

Answer

Correct Answer: Member-wise

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72. This code is an example of a(n) ____ while loop.

Sentinel-controlled

Flag-controlled

EOF-controlled

Counter-controlled

Answer

Correct Answer: EOF-controlled

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73. The word “memory” consists of 48 bits, which is equivalent to _____ bytes.

Kernel

256

Its nonvolatile memory

Answer

Correct Answer: 6

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74. The symbol used to represent a loop condition on a flowchart is the ____ symbol.

Diamond

Rectangle

Hexagon

Parallelogram

Answer

Correct Answer: Diamond

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

Answer

Correct Answer:

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76. The purpose of the __________ is to get the first input value for the validation of a loop.

Type mismatch

Islnteger

Priming read

Sensitive

Answer

Correct Answer: Priming read

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77. The pointer is indicating the _____.

Envelope

Genome

Viral protein coat

Capsid

Microfilaments

Answer

Correct Answer: Viral protein coat

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78. The pl/sql block starts with the ____ clause.

IS.

OPEN.

DECLARE.

BEGIN

Answer

Correct Answer: BEGIN

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79. The __________ function will return the number of characters in a given string.

Consecutive

Element

Concatenation

Length_Of()

Answer

Correct Answer: Length_Of()

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80. Members of a(n) ________ union have names, but the union itself has no name.

Anonymous

Semicolon

Integers

A member

Answer

Correct Answer: Anonymous

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81. A ____ loop is best used when the specific number of iterations required is known.

For-loops

While-loops

Nested-loops

Answer

Correct Answer: For-loops

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82. ________ can be used as pointers.

Never

Seldom

Indirectly

All of these

None of these

Answer

Correct Answer: Indirectly

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83.
Choose the correct output of the given program.
#include
main()
{
struct b
{
int on:1;
};
struct b v = [1];
printf("%d\n", v.on);

}

-1

Compilation error

Answer

Correct Answer:

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84.
What would be the output of the given program?
int main()
{
int i =1, j=1;
for ( ; ; )
{
if ( i > 5 )
break;
else
j += i--;
Printf ( "%d\n", j );
i += j;
j= j+7;
}
return 0;
}

Answer

Correct Answer:

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85. What will happen if in a C program you assign a value to an array element whose subscript exceeds the size of array?

The element will be set to 0.

The compiler would report an error.

The program may crash if some important data gets overwritten.

The array size would appropriately grow.

Answer

Correct Answer: The program may crash if some important data gets overwritten.

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86. What is the output of the following code? void myFunction(int foo[2][3]) { foo[0][1] = 5; int i = 0, j = 0; for (i = 0; i < 2; i++) for (j = 0; j < 3; j++) printf("%d ", foo[i][j]); } int main() { int foo[2][3] = {0}; myFunction(foo); return 0; }

0 5 0 0 0 0

Error

garbage 5 garbage garbage garbage garbage

Nothing

Answer

Correct Answer: 0 5 0 0 0 0

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87.
Which of the following is used for dynamically allocating memory?

malloc() and memalloc()

alloc() and memalloc()

malloc() and calloc()

memalloc() and faralloc()

Answer

Correct Answer: malloc() and calloc()

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88.
Assuming, integer is 2 byte, What will be the output of the program? #include<stdio.h>int main() { printf("%x\n", -2<<2); return 0; }

ffff

fff8

Error

fff1

Answer

Correct Answer: fff8

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89.
#pragma exit is primarily used for?

Checking memory leaks after exiting the program.

Informing Operating System that program has terminated.

Running a function at exiting the program.

No such preprocessor exist.

Answer

Correct Answer: Running a function at exiting the program.

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90.
Many features of C were derived from an earlier language called _____.

BCPL

FORTRAN

BASIC

PASCAL

Answer

Correct Answer: B

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91.
#include are _ files and #include “somefile.h” __ files.

Library, Library

Library, user-created header

User-created header, library

They can include all types of file

Answer

Correct Answer: They can include all types of file

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92.
Which of the following is an invalid identifier?

foobar

foobar1

_foobar

1foobar

Both 3 and 4

Answer

Correct Answer: 1foobar

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93.
#include <stdio.h>int main() { char *var = "Programming in C is fun."; } Which of the following format identifier can never be used for the variable var?

Answer

Correct Answer: %c

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94.
Which of the following is not a Standard Predefined Macro?

__DATE__

__TIME__

__FILE__

__LINE__

__BREAK__

Answer

Correct Answer: __BREAK__

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95.
Which statement will you add in following program to work it correctly? #include<stdio.h>int main() { printf("%f\n",log(360.0)); return 0; }

#include<conio.h>

#include<math.h>

#include<stdlib.h>

#include<dos.h>

Answer

Correct Answer: #include<math.h>

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96.
Considering that integer is 4 bytes long, what is the output of the following code? int main() { intfoobar=20, foo, bar; foo=&foobar; /* Assume address of foobar is 2100/ bar=foo; foo++=*bar++; foobar++; printf("foobar=%d, foo=%d, bar=%d\n", foobar, foo, bar); return 0; }

foobar=21, foo=2104, bar=2104

foobar=21, foo=2100, bar=2104

foobar=20, foo=2104, bar=2108

foobar=21, foo=2104, bar=2108

Answer

Correct Answer: foobar=21, foo=2104, bar=2104

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97.
Considering the following definition of a Union MyUnion, if int occupies 4 bytes, what is the memory size occupied by a variable of type MyUnion? union MyUnion { int foo; float bar; char foobar[16]; };

Answer

Correct Answer: 16

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98.
If the storage size of unsigned int is 2 bytes, then the range of values of an unsigned integer is:

0 to 65,535

0 to 255

0 to 32,767

0 to 2

Answer

Correct Answer: 0 to 65,535

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99.
Assuming integer is 4 bytes long and the address for 'i' is 2000, what is the output for the following code? int main() { int foo, bar, foobar, i=5; foobar = &i; bar = &foobar; foo = &bar; printf("%d, %d, %d\n", foobar, bar, foo); return 0; }

2000, 2004, 2008

5, 5, 5

5, 2000, 2000

2000, 2000, 2000

Answer

Correct Answer: 5, 5, 5

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

100.
Assuming integer takes 4 bytes and the starting address of the array 'foo' is 2000, what will be the output of the following code? int main() { int foo[2][3][4][5]; foo[2][3][4][5] = 50; printf("%d",((((foo+2)+3)+4)+5)); return 0; }

2000

2014

2056

Answer

Correct Answer: 50

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

101.
If short takes 2 bytes of memory, what will be the output of the following program?

int main () {

short foobar[2][3] = { {1,5}, {9,8,7}}; printf("%d", sizeof(foobar)); return 0; }

Answer

Correct Answer: 12

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

102.
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 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.

Note: This question has more than 1 correct answers

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

103.
Bitwise operators can be used to generate random numbers.

Yes

Answer

Correct Answer: No

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

104.
In order to fetch the address of a variable, we write preceding _____ sign before variable name.

Comma

Percent

Asteriks

Ampersand

Answer

Correct Answer: Ampersand

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

105.
Which keyword is used to declare a variable so that the variable can be accessed by all the functions in all the modules of a program?

extern

const

static

Answer

Correct Answer: extern

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

106.
Which function is called at program startup?

start()

getch()

main()

system()

Answer

Correct Answer: main()

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

107.
Which of the following declaration is not supported by C?

String str;

char *str;

char str[] = "Hello";

Answer

Correct Answer: String str;

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

108.
What does the following declaration mean? int(*ptr)[10];

ptr is an array of pointers to 10 integers

ptr is a pointer to an array of 10 integers

ptr is a pointer to array

ptr is an array of 10 integers

Answer

Correct Answer: ptr is a pointer to an array of 10 integers

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

109.
Which of the following is not a logical operator?

Answer

Correct Answer: &

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

110.
What does argc and argv indicate in command-line arguments? (Assuming: int main(int argc, char *argv[]) )

argument count, argument variable

argument count, argument vector

argument control, argument variable

argument control, argument vector

Answer

Correct Answer: argument count, argument vector

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

111.
The keyword ‘break’ cannot be simply used within __?

Do-while

If-else

For

While

Answer

Correct Answer: If-else

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

112.
How will you free the allocated memory?

remove(var-name)

free(var-name)

delete(var-name)

dalloc(var-name)

Answer

Correct Answer: free(var-name)

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

113.
How will you print \n on the screen?

printf("\n")

echo "\\n"

printf('\n')

printf("\\n")

Answer

Correct Answer: printf("\\n")

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

114.
What is the built in library function to adjust the allocated dynamic memory size?

malloc

calloc

realloc

resize

Answer

Correct Answer: realloc

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

115.
Offset used in fseek() function call can be a negative number.

True

False

Answer

Correct Answer: True

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

116.
Offset used in fseek() function call can be a negative number.

foo = fopen ("bar.txt", "w+");

foo = fopen ("bar.txt", "a");

foo = fopen ("bar.txt", "r+");

foo = fopen ("bar.txt", "w");

foo = fopen ("bar.txt", "r");

Answer

Correct Answer: foo = fopen ("bar.txt", "a");

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

117.
Which of the following correctly shows the hierarchy of arithmetic operators in C?

/ + * -

* - / +

+ - / *

/ * + -

Answer

Correct Answer: / * + -

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

118.
Which of the following operations can be performed on the file "NOTES.TXT" using the below code? FILE *fp; fp = fopen("NOTES.TXT", "r+");

Reading

Writing

Appending

Read and Write

Answer

Correct Answer: Read and Write

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

119.
Which storage class is the default storage class for all local variables?

auto

static

extern

Answer

Correct Answer: auto

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

120.
Which keyword is used to retain value of a variable in multiple function invocations?

volatile

static

extern

transient

Answer

Correct Answer: static

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

121.
An array elements are always stored in ____ memory locations.

Data Type

Variable Name

Address

Value

Answer

Correct Answer: Address

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

122.
An array elements are always stored in ____ memory locations.

Sequential

Random

Sequential and Random

None of the above

Answer

Correct Answer: Sequential

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

123.
An array elements are always stored in ____ memory locations.

A copy of the first element of the array

A copy of all the elements of the array

The address of the first element of the array

The address of the last element of the array

Answer

Correct Answer: The address of the first element of the array

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

124.
A file written in text mode can be read back in binary mode.

Yes

Answer

Correct Answer: No

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

125.
Smallest element of an array is called as __.

Upper Bound

Middle Bound

Lower Bound

Range

Answer

Correct Answer: Lower Bound

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

126.
What is the output of the following program? main( ) { int foo = ('k' - 'j')/4; printf("foo = %d",foo); return 0; }

Answer

Correct Answer: 0

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

127.
For binary files, a ___ must be appended to the mode string.

Nothing

“b”

“binary”

“01"

Answer

Correct Answer: “b”

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128.
What type of array is generally generated in Command-line argument?

Single dimension array

2-Dimensional Square Array

Jagged Array

2-Dimensional Rectangular Array

Answer

Correct Answer: Jagged Array

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

129.
Declare the following statement? "An array of three pointers to chars"

char *ptr[3]();

char *ptr[3];

char (*ptr[3])();

char **ptr[3];

Answer

Correct Answer: char *ptr[3];

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

130.
Left shifting a number by 1 is always equivalent to multiplying it by 2.

True

False

Answer

Correct Answer: True

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

131.
Which function is used to check if the end of the file has been reached in C?

fscanf()

feof()

fclose()

fgets()

Answer

Correct Answer: feof()

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

132.
The maximum combined length of the command-line arguments including the spaces between adjacent arguments is

128 characters

256 characters

67 characters

It may vary from one operating system to another

Answer

Correct Answer: It may vary from one operating system to another

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

133.
What will be the output of the program ? #include<stdio.h> int main() { int a[5] = {5, 1, 15, 20, 25}; int i, j, m; i = ++a[1]; j = a[1]++; m = a[i++]; printf("%d, %d, %d", i, j, m); return 0; }

2, 1, 15

1, 2, 5

3, 2, 15

2, 3, 20

Answer

Correct Answer: 3, 2, 15

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

134.
Which header file should be included to use functions like malloc() and calloc()?

memory.h

stdlib.h

string.h

dos.h

Answer

Correct Answer: stdlib.h

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

135.
Where is the file searched, when #include is used with angular brackets <>?

System Libraries

The current source directory

Both of the above

Answer

Correct Answer: System Libraries

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

136.
Which of the following is not a Preprocessor Directive in C?

#include

#define

#if

#elseif

Answer

Correct Answer: #elseif

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

137.

#include <stdio.h> is a __?

Preprocessor directive

Inclusion directive

File inclusion directive

None of the above

Answer

Correct Answer: Preprocessor directive

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

138.

Which of the following are C preprocessors?

#ifdef

#define

#endif

All of the mentioned.

Answer

Correct Answer: All of the mentioned.

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

139.

C preprocessors can have compiler specific features.

true

false

Depends on the standard

Depends on the platform

Answer

Correct Answer: true

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

140.

Consider the 32 bit compiler. We need to store address of integer variable to integer pointer. What will be the size of integer pointer ?

2 Bytes

4 Bytes

6 Bytes

10 Bytes

Answer

Correct Answer: 2 Bytes

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

141.

What is (void*)0?

Representation of NULL pointer

Representation of void pointer

Error

None of above

Answer

Correct Answer: Representation of NULL pointer

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

142.

What is the output of the following program? int main () { int foo = 1; do{ printf("%d ", foo); foo++; }while( foo <= 10 ) return 0; }

1 2 3 4 5 6 7 8 9 10

1 1 1 1 1 1 1 1 1 1

The program will not execute due to an error

Answer

Correct Answer: The program will not execute due to an error

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

143.

What is used to convert a C program into machine language for execution?

Compiler

Interpreter

Assembler

Editor

Answer

Correct Answer: Assembler

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144.

Pick the incorrect fopen statement:

fp = fopen ("file.txt", "w");

fp = fopen ("file.txt", "w+");

fp = fopen ("file.txt", "r");

fp = fopen ("file.txt", "a");

None of the above

Answer

Correct Answer: None of the above

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

145.

What is the output of the following code snippet? #include<stdio.h> main() { int x = 5; if(x=5) { if(x=5) break; printf("Hello"); } printf("Hi"); }

Compile error

HelloHi

Compiler warning

Answer

Correct Answer: Compile error

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

146.

Which function is used to de-allocate the memory allocated using malloc()?

realloc()

dealloc()

delete()

free()

Answer

Correct Answer: free()

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

147.

What will be the output of following code? int main() { int a=5; if(a=10) printf("Value of a=%d",a); else printf("Value of a=%d",a); return 0; }

Value of a=5

Value of a=10

Value of a=0

Answer

Correct Answer:

Value of a=10

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

148.

Which of the following is an invalid operator?

Answer

Correct Answer: <>

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149.

What will be the output of following program? #include<stdio.h> int main() { int y=128; const int x=y; printf("%d\n",x); return 0; }

128

Garbage value

Error

Answer

Correct Answer: 128

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150.

What is the output of the following code? main() { int foo = 10; foo = foo << 2; printf("foo = %d",foo); }

foo = 10

foo = 20

foo = 30

foo = 40

foo = 2

Answer

Correct Answer: foo = 40

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151.

Which of the following is the correct usage of conditional operator in C?

a>b ? c=30 : c=40;

a>b ? c=30;

max = a>b ? a>c?a:c:b>c?b:c

return (a>b)?(a:b)

Answer

Correct Answer: max = a>b ? a>c?a:c:b>c?b:c

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152.

What is the output of this C code? #include <stdio.h> void main() { int x = 1, y = 0, z = 5; int a = x && y || z++; printf("%d", z); }

Varies

Answer

Correct Answer: 6

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153.

Which bit wise operator is suitable for turning off a particular bit in a number?

&& operator

& operator

|| operator

! operator

Answer

Correct Answer: & operator

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154.

Bit wise & and | are unary operators.

True

False

Answer

Correct Answer: False

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155.

Which format specifier can be used to print a float value?

%lf

%Lf

None of the above

Answer

Correct Answer: %f

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

156.

Which format specifier can be used to print a float value?

1, 2

1, 3

2, 4

1, 2, 3

Answer

Correct Answer: 1, 2, 3

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157.

What will be the output of following program? #include<stdio.h> int main() { int k=1; printf("%d==1 is " "%s\n",k,k==1?"TRUE":"FALSE"); return 0; }

k==1 is TRUE

1==1 is TRUE

k==1 is FALSE

1==1 is FALSE

Answer

Correct Answer: 1==1 is TRUE

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158.

In the following code, the p2 is Integer pointer or Integer? typedef int *ptr; ptr p1,p2;

Integer

Integer Pointer

Error in declaration

None of the above

Answer

Correct Answer: Integer Pointer

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159.

Which of the following cannot be a variable name in C?

Volatile

True

friend

export

Answer

Correct Answer: Volatile

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160.

If there is any error while opening a file, fopen will return?

Nothing

EOF

NULL

Depends on compiler

Answer

Correct Answer: NULL

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161.

What is the following program doing? #include<stdio.h> main() { FILE *stream=fopen("a.txt",'r'); }

Trying to open “a.txt” in read mode

Trying to open “a.txt” in write mode.

“stream” is an invalid identifier

Compile error

Answer

Correct Answer: Compile error

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162.

Can you combine the following two statements into one? char p; p = (char) malloc(100);

char p = *malloc(100);

char *p = (char) malloc(100);

char *p = (char*)malloc(100);

char *p = (char *)(malloc*)(100);

Answer

Correct Answer: char *p = (char*)malloc(100);

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163.

What will be the output of following program? #include<stdio.h> int main() { const int x=5; const int ptrx; ptrx=&x; ptrx=10; printf("%d\n",x); return 0; }

Error

Garbage value

Answer

Correct Answer: Error

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164.

Let x be an array. Which of the following operations are illegal? a) ++x b) x+1 c) x++ d) x*2

a and b

a, b and c

b and c

a, c and d

c and d

Answer

Correct Answer: a, c and d

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165.

What will be the output of following code? main() { int foo = 20; int bar = 3; float foobar; foobar = (float) foo / bar; foo = foobar; printf("foobar = %5.3f\nfoo = %d", foobar, foo ); }

foobar = 6.667 foo = 6

foobar = 6.6667 foo = 6.666667

foobar = 6.667 foo = 6.666667

foobar = 6.6667 foo = 6

Answer

Correct Answer: foobar = 6.667 foo = 6

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166.

All keywords in C are in _____.

LowerCase letters

UpperCase letters

CamelCase letters

None

Answer

Correct Answer: LowerCase letters

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167.

What does fp point to in the program ? #include<stdio.h> int main() { FILE *fp; fp=fopen("trial", "r"); return 0; }

The first character in the file

A structure which contains a char pointer which points to the first character of a file.

The name of the file.

The last character in the file.

Answer

Correct Answer: A structure which contains a char pointer which points to the first character of a file.

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168.

Which of the following syntax is correct for command-line arguments?

int main(int var, char *varg[])

int main(char *argv[], int argc)

int main() { int argv, char *argc[]; }

Both 1 and 2

Answer

Correct Answer: int main(int var, char *varg[])

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

169.

The preprocessor provides the ability for ___.

The inclusion of header files.

The inclusion of macro expansions.

Conditional compilation and line control.

All of the mentioned.

Answer

Correct Answer: All of the mentioned.

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170.

Which type of files can’t be opened using fopen()?

.txt

.bin

None of the mentioned

Answer

Correct Answer: None of the mentioned

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171.

What does the following declaration signify? char *arr[10];

arr is an array of 10 character pointers

arr is an array of function pointer

arr is an array of characters

arr is a pointer to array of characters

Answer

Correct Answer: arr is an array of 10 character pointers

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172.

Which of the following operators is used to access the data members of a structure?

Answer

Correct Answer: .

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173.

Point out the error in the following code: struct emp { int ecode; struct emp *e; }

Error in structure declaration

Linker Error

No Error

None of the above

Answer

Correct Answer: Error in structure declaration

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174.

Which operator connects the structure name to its member name?

- (dash)

. (dot)

Both 1 and 2

None

Answer

Correct Answer: . (dot)

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175.

The prototype of a function can be used to :

Define a function

Erase a function

Declare a function

None of the above

Answer

Correct Answer: Declare a function

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176.

Which keyword is used to transfer control from a function back to the calling function?

switch

goto

go back

return

Answer

Correct Answer: return

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

177.

Which operation is illegal in structures?

Typecasting of structure

Pointer to a variable of same structure

Dynamic allocation of memory for structure

All of the mentioned

Answer

Correct Answer: Typecasting of structure

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178.

Point out the error in the following program(if it is compiled with Turbo C compiler)? #include<stdio.h> int main() { display(); return 0; } void display() { printf("Upwork.com"); }

No Error

display() does not get invoked

display() is called before it is defined

None of the above

Answer

Correct Answer: display() is called before it is defined

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179.

Which of the following can not be a member in a structure?

Array

Pointer

Another Structure

A function

Answer

Correct Answer: A function

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180.

What is the scope of a function?

Whole source file in which it is defined.

From the point of declaration to the end of the file in which it is defined.

Any source file in a program.

From the point of declaration to the end of the file being compiled.

Answer

Correct Answer: From the point of declaration to the end of the file being compiled.

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181.

In which stage the following code : #include<stdio.h> gets replaced by the contents of the file stdio.h?

During Editing

During linking

During execution

During preprocessing

Answer

Correct Answer: During preprocessing

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182.

Which of the following functions can be used to set the file position indicator to the beginning of the file?

fseek()

rewind()

feof()

ftell()

Answer

Correct Answer: fseek()
rewind()

Note: This question has more than 1 correct answers

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

183.

Point out the error in the program? typedef struct data mystruct; struct data { int x; mystruct *b; };

Error: in structure declaration

Linker Error

No Error

None of above

Answer

Correct Answer: No Error

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184.

True or False: "The expressions ptr++ and ++ptr are same"

True

False

Answer

Correct Answer: False

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185.

Which of the following is a correct way to initialize an array?

int n[6] = { 2, 4, 12, 5, 45, 5 };

int n{} = { 2, 4, 12, 5, 45, 5 };

int n{6} = { 2, 4, 12 };

int n(6) = { 2, 4, 12, 5, 45, 5 };

Answer

Correct Answer: int n[6] = { 2, 4, 12, 5, 45, 5 };

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

186.

Which of the following is not a valid variable declaration?

int _a3;

int a_3;

int 3_a;

int _3a;

Answer

Correct Answer: int 3_a;

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187.

Which of the following is a correct format for declaration of a function?

return-type function-name(argument type);

return-type function-name(argument type) {}

return-type (argument type)function-name;

Both 1 and 2

Answer

Correct Answer: return-type function-name(argument type);

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188.

When a program uses command line arguments, then argv[0]?

is a pointer to the first command line argument supplied.

refers to the number of arguments passed.

holds the name of the program itself.

is null.

Answer

Correct Answer: holds the name of the program itself.

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

189.

Which of the following is TRUE about argv?

It is an array of character pointers

It is a pointer to an array of character pointers

It is an array of strings

None of above

Answer

Correct Answer: It is an array of character pointers

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

190.

What is argc used for?

It points to each argument passed to the program

It is the number of arguments passed to the program

It is the argument of type command line

It counts the memory occupied by all the arguments

Answer

Correct Answer: It is the number of arguments passed to the program

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191.

How many times "Upwork" gets printed? #include<stdio.h> int main() { int x; for(x=-1;x<=10;x++) { if(x<5) continue; else break; printf("Upwork"); } return 0; }

Infinite times

11 times

0 times

10 times

Answer

Correct Answer: 0 times

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192.

What is the output of this C code? int main() { int i = 10; void p = &i; printf("%d\n", (int)p); return 0; }

Compile time error

Segmentation fault/runtime crash

Undefined behavior

Answer

Correct Answer: Compile time error

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193.

log(x) function defined in math.h header file is

Natural base logarithm.

Logarithm to the base 2.

Logarithm to the base 10.

None of the above.

Answer

Correct Answer: Natural base logarithm.

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194.

What is the output of the following code? int main() { FILE *foobar = stdout; int foo; fprintf(foobar, "%d ", 20); fflush(stdout); fprintf(stderr, "%d", 99); return 0; }

2099

20 99

An error will be output

Answer

Correct Answer: 20 99

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

195.

What will be the output of following code:- #include<stdio.h> #include<stdarg.h> void display(int num,...); int main() { display(4,'A','B','C','D'); return 0; } void display(int num, ...) { char c,c1; int j; va_list ptr,ptr1; va_start(ptr,num); va_start(ptr1,num); for(j=1;j<=num;j++) { c=va_arg(ptr, int); printf("%c,",c); c1=va_arg(ptr1, int); printf("%d\n",c1); } }

A,A B,B C,C D,D

A,a B,b C,c D,d

A,65 B,66 C,67 D,68

A,0 B,0 C,0 D,0

Answer

Correct Answer: A,65 B,66 C,67 D,68

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

196.
How many times i value is checked in the below code? #include <stdio.h> int main() { int i = 0; do { i++; printf("in while loop\n"); } while (i < 3); }

Answer

Correct Answer: 3

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

197.
If the two strings are identical, the strcmp() function returns?

-1

Yes

Answer

Correct Answer: 0

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

198.
The first argument in command line arguments is?

The number of command-line arguments the program was invoked with.

A pointer to an array of character strings that contain the arguments.

Nothing

Both 1 and 2

Answer

Correct Answer: The number of command-line arguments the program was invoked with.

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

199.
How many times the program will print "Hello World" ? #include<stdio.h> int main() { printf("Hello World"); main(); return 0; }

Infinite times

32767 times

65535 times

Till stack overflows

Answer

Correct Answer: Till stack overflows

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

200.
What will be the output of following code?

int' main()

{

        int i;

        i = 0;

   for (i = 1; i <2; i++)

{

           i++;

        printf( "%d", i );

        continue;

        printf( "%d", i );

}

return 0;

}

2,2

none of the above

Answer

Correct Answer: 2

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

201.
What would be printed on the standard output as a result of the following code snippet? #include<stdio.h> main() { unsigned char a=255; a = a+1; printf("%d",a); return 0; }

Undefined value

256

-1

Answer

Correct Answer: 1

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

202.
What would be printed on the standard output as a result of the following code snippet? main() { int arr[10]; int a = sizeof(arr); printf("%d\n",a); return 0; }

Compilation Error

Answer

Correct Answer: 40

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

203.
Which standard function is used to clear memory allocated by the malloc() function?

free

calloc

delete

elease

destroy

Answer

Correct Answer: free

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

204.
What is the output of the following program ? main() { int u = 1, v = 3; printf("%d %d",u,v); funct1(&u,&v); printf(" %d %d\n",u,v); } void funct1(int pu, int pv) { pu=0; pv=0; return; }

1 3 1 3

1 3 1 1

1 3 0 0

1 1 1 1

3 1 3 1

Answer

Correct Answer: 1 3 0 0

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

205.
In which area of memory are static variables allocated?

stack

heap

With the code binary

None of the above

Answer

Correct Answer: stack

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

206.
What would be printed on the standard output as a result of the
following code snippet?

main()
{
enum {red, green, blue = 0, white};
printf("%d %d %d %d", red, green, blue, white);
return 0;
}

Will result in Compilation Error

0 1 2 3

0 1 0 1

0 1 0 2

Undefined

Answer

Correct Answer: 0 1 0 1

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

207.
Which of the following is not a valid mode for opening a file?

Answer

Correct Answer: i

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

208.
Which of the following is not a string function?

strlen()

strcmp()

strcpy()

strrev()

strcomp()

Answer

Correct Answer: strcomp()

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

209.
What will be printed on the standard output as a result of the following
code snippet?
void func()
{
static int i = 1;
int j = 1;
i++;
j++;
printf("%d %d ",i,j);
}
void main()
{
func();
func();
func();
}

2 2 2 2 2 2

2 2 3 2 4 2

2 2 2 3 2 4

2 2 3 3 4 4

None of these

Answer

Correct Answer: 2 2 3 2 4 2

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

210.
What will be printed on the standard output as a result of the following
code snippet?
void main()
{
int arr[][2] = {1,2,3,4,5,6};
printf("%d",arr[2][1]);
}

Answer

Correct Answer: 6

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

211.
Which of the following is not a type of operator ?

Rational

Unary

Ternary

Compound assignment

Logical

Answer

Correct Answer: Rational

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

212.
From which of the following loop or conditional constructs, is "break"
used for an early exit?

switch

for

while

do-while

All of the above

Answer

Correct Answer: All of the above

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

213.
Which of the following comparison statements will be true if an
integer is 16 bits and a long is 32 bits on a machine?

-1L < 1U

-1L > 1U

-1L < 1UL

-1L > 1UL

Answer

Correct Answer: -1L < 1U
-1L > 1UL

Note: This question has more than 1 correct answers

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

214.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
signed char i = 1;
for (; i<=255; i++)
printf ("%d ",i);
return 0;
}

Compilation Error

1 2 3 ... 255

1 2 3 . . . 127

1 2 3 . . . 127 -128 -127 ... 0 1 2 3 . . . (infinite times)

Answer

Correct Answer: 1 2 3 . . . 127 -128 -127 ... 0 1 2 3 . . . (infinite times)

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

215.
An array is defined with the following statement in a file, file1.c
int a[ ] = { 1, 2, 3, 4, 5, 6 };
In another file, file2.c, the following code snippet is written to use the
array a:
extern int a[];
int size = sizeof(a);
What is wrong with the above code snippet?

The size of the operator cannot be applied to an array

There is nothing wrong with the code snippet. The value of the size will be 6

There is nothing wrong with the code snippet. The value of the size will be 7

An extern array of unspecified size is an incomplete type. The size of the operator during compile time is unable to learn the size of an array that is defined in another file

None of the above

Answer

Correct Answer: An extern array of unspecified size is an incomplete type. The size of the operator during compile time is unable to learn the size of an array that is defined in another file

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

216.
Which of the following is the correct way of initializing a twodimensional array?

char str[2][4]={ "abc", "def" };

char str[2][4]={ {"abc"}, {"def"} };

char str[2][4]={ {'a','b','c','\0'}, {'d','e','f','\0'} };

a and b

a, b and c

Answer

Correct Answer: a, b and c

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

217.
Which of the following standard functions is used to close a file?

fileclose()

closefile()

fclose()

Any of the above

Answer

Correct Answer: fclose()

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

218.
Study the following code:
int n = 2;
int a[n];
What is the error in the above code?

There is no error

The minimum limit of an array is 5

The second statement should be placed before the first

A constant value has to be given in place of a variable for array declaration

Answer

Correct Answer: A constant value has to be given in place of a variable for array declaration

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

219.
What will happen when the following code is executed?

{
int num;
num =0;
do {-- num;
printf("%d\n", num);
num++;
} while (num >=0);
}

The loop will run infinitely

The program will not enter the loop

There will be a compilation error

A runtime error will be reported

Answer

Correct Answer: There will be a compilation error

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

220.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
int i=5;
char option = 5;
switch(option)

{
case '5':
printf("case : 1 \n");
break;
case i:
printf("case : 2 \n");
break;
default:
printf("case : 3 \n");
break;
}
return 0;
}

case : 1

case : 2

case : 3

Result in compilation error

None of the above

Answer

Correct Answer: Result in compilation error

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

221.
What would be printed on the standard output as a result of the
following code snippet?

#define max(a, b)((a) > (b)?(a):(b))
main()
{
int a=4, c = 5;
printf("%d ", max(a++, c++));
printf("%d %d\n", a,c);
}

Results in Compilation Error

6 4 5

6 5 7

6 5 6

None of the above

Answer

Correct Answer: 6 5 7

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

222.
What would be printed on the standard output as a result of the
following code snippet?
#define func(t, a, b) { t temp; temp=a; a=b; b=temp; }
main()
{
int a=3, b=4;
float c=4.5, d = 5.99;
func(int, a, b);
func(float, c, d);
printf("%d %d ", a, b);
printf("%.2f %.2f\n", c, d);
}

Results in Compilation Error

3 4 5.99 4.50

3 4 4.50 5.99

4 3 5.99 4.50

None of the above

Answer

Correct Answer: 4 3 5.99 4.50

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

223.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
int a[5] = {1,4,5,6,9};
printf("%d\t", a); //Line 1
printf("%d", ++a); //Line 2
return 0;
}

1 4

0 1

Undefined value

Compilation Error in "Line 1"

Compilation Error in "Line 2"

Answer

Correct Answer: Compilation Error in "Line 2"

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

224.
If a two dimensional array arr[4][10](an array with 4 rows and 10 columns) is to be passed in a function, which of the following would be the valid parameters in the function definition?

fn(int arr[4][10])

fn(int arr[][10])

fn(int arr[4][])

fn(int (*fn)[13])

None of the above

Answer

Correct Answer: fn(int arr[4][10])
fn(int arr[][10])
fn(int (*fn)[13])

Note: This question has more than 1 correct answers

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

225.
Given the array:

int num[3][4]=
{
{3,6,9,12},
{15,25,30,35},
{66,77,88,99}
};
what would be the output of ((num+1))?

Answer

Correct Answer: 15

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

226.
What will be printed on the standard output as a result of the following
code snippet?
void main()
{
int arr[5]={1,2,3,4,5};
printf("%d\n", *(arr+4));
}

Cannot be determined

Answer

Correct Answer: 5

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

227.
Is the following statement correct? If not, why not? If yes, what is the
size of the array?
int array[][3] = { {1,2}, {2,3}, {3,4,2} };

Yes, the size is three columns by two rows

Yes, the size is two columns by two rows

No, the first dimension is omitted

No, one of the three initializer sets contains too many numbers

Yes, the size is three columns by three rows

Answer

Correct Answer: Yes, the size is three columns by three rows

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

228.
What would be printed on the standard output as a result of the
following code snippet?
main()
{

char *s="Hello World";
char s1[20], s2[20];
int len = sscanf(s,"%s",s1);
printf("%s : %d", s1, len);
}

Compilation Error

Hello World : 11

Hello World : 1

Hello : 5

Hello : 1

Answer

Correct Answer: Hello : 1

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

229.
Which of the following functions is used to extract formatted input
from a file?

fputc()

fputs()

fprintf()

fscanf()

ftell()

Answer

Correct Answer: fscanf()

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

230.
What does the following function do?
int fn(unsigned int x)
{
int count = 0;
for(; x!=0; x&=(x-1))
count++;
return count;
}

Returns the minimum number of bits required to represent the number x

Returns the number of zero bits present in the number x

Returns the number of 1 bits(bits having one) in the number x

Returns the square root of the number

None of the above

Answer

Correct Answer: Returns the minimum number of bits required to represent the number x

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

231.
What will be the output of the following program?
#include <assert.h>
main()
{
int n = 5;
assert(n > 3); //statement 1
n = n+2;
assert(n > 7);//statement 2
return 0;
}

Assertion 'n > 3' failed; Program aborts at statement 1

Assertion 'n > 7' failed; Program aborts at statement 2

Program returns 0 with the value of n as 7

Compilation Error

Answer

Correct Answer: Assertion 'n > 7' failed; Program aborts at statement 2

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

232.
What is the error in the following statement where str is a character
array and the statement is supposed to traverse through the whole
character string str?
for(i=0;str[i];i++)

There is no error

There should be no semi colon after the statement

The condition should be str[i] != '\0'

The condition should be str[i] != NULL

i should be initialized to 1

Answer

Correct Answer: The condition should be str[i] != '\0'

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

233.
In order to read structures/records from a file, which function will you
use?

fscanf()

fread()

fgets()

fgetc()

fseek

Answer

Correct Answer: fread()

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

234.
What would be printed on the standard output as a result of the
following code snippet?
int b = 5;
main()
{
void addup (int b);
int i;
for(i=1; i<=5; i++)
addup(1);
return 0;
}
void addup (int b)
{
static int v1;
v1 = v1+b;
printf("%d ", v1);
}

1 2 3 4 5

5 6 7 8 9

5 5 5 5 5

1 1 1 1 1

Undefined value

Answer

Correct Answer: 1 2 3 4 5

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

235.
Which of the following declarations of structures is/are valid?
1)
struct node {
int count;
char word;
struct node next;
}Node;

2)
struct node {
int count;
char word;
struct node next;
}Node;
3)
struct node {
int count;
char word;
union u1 {
int n1;
float f1;
}U;
}Node;

123

None of the above

Answer

Correct Answer: 23

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

236.
Which file header is to be included for file handling in a C program?

string.h

file.h

stdio.h

stdlib.h

ctype.h

Answer

Correct Answer: stdio.h

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

237.
Given the following array:
char books[][40]={
"The Little World of Don Camillo",
"To Kill a Mockingbird",
"My Family and Other Animals",
"Birds, Beasts and Relatives"
};
what would be the output of printf("%c",books[2][5]);?

Answer

Correct Answer: m

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

238.
What would be printed on the standard output as a result of the
following code snippet?
char i = 'A';
char j;
j = & i;

j = *j + 32;
printf("%c",i);

An error will occur

Answer

Correct Answer: a

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

239.
Identify the incorrect statement.

Records can be defined in C by using structures

Structure members can be of the same/different data types

Memory is reserved when a structure label is defined

A pointer to a structure can be used to pass a structure to a function

Arrays of structures can be defined and initialized

Answer

Correct Answer: Memory is reserved when a structure label is defined

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

240.
What would be printed on the standard output as a result of the
following code snippet?
char *str1 = "Hello World";
strcat(str1, '!');
printf("%s", str1);

Hello World!

Hello World

Hello

The code snippet will throw a compilation error

Answer

Correct Answer: The code snippet will throw a compilation error

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

241.
What is the return value in case a file is not opened successfully by
using fopen()?

100

NULL

Answer

Correct Answer: NULL

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

242.
Which of the following statements is/are valid and correct?
1.char amessage[] = "lmnop";
amessage++;
2.char pmessage = "abcde";
(pmessage)++;
3.char amessage[] = "lmnop";
(amessage)++;
4.char pmessage = "abcde";
pmessage++;

1234

Answer

Correct Answer: 34

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

243.
The declaration int (*p[5])() means:

p is an array of pointers to functions the return type of which is an integer

p is a pointer to a function that returns a pointer to an integer

p is a pointer to an array of integers

p is a pointer to an array of integer pointers

p is a pointer to a character string

Answer

Correct Answer: p is an array of pointers to functions the return type of which is an integer

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

244.
What is wrong with the following statement?
int func();

The function definition {...} is missing

While calling a function, the type int is not needed

No parameter has been passed

The semicolon should not be there

There is nothing wrong with the statement

Answer

Correct Answer: There is nothing wrong with the statement

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

245.
Consider the following code.
int i = 4, j, k;
Which one of the following statements will not work?

j = &i;

j = j + 4;

j = j - 2;

k = j + 3;

j = j * 2;

Answer

Correct Answer: j = j * 2;

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

246.
Given the following array:
int a[8] = {1,2,3,4,5,6,7,0};
what would be the output of
printf("%d",a[4]); ?

Answer

Correct Answer: 5

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

247.
What will be printed on the standard output as a result of the following
code snippet?
int funr(int x, int y)
{
if(x <= 0)
{
return y;
}
else
{
return (1+funr(x-1,y));
}
}
void main()
{
printf("%d",funr(2,3));
}

Answer

Correct Answer: 5

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

248.
Given the array:
int num[3][4]= {
{3,6,9,12},
{15,25,30,35},
{66,77,88,99}
};
what would be the output of ((num+1)+1)+1?

Answer

Correct Answer: 26

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

249.
Which function will you use to write a formatted output to the file?

fputc()

fputs()

fprintf()

fseek()

ftell()

Answer

Correct Answer: fprintf()

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

250.
Which of the following is not a file related function?

fgetc()

puts()

fputc()

fscanf()

fprintf()

Answer

Correct Answer: puts()

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

251.
What would be printed on the standard output as a result of the
following code snippet?
void main()
{
unsigned char a=25;

a = ~a;
signed char b = 25;
b = ~b;
printf("%d %d ", a, b);
}

0 0

230 230

230 -26

230 -103

None of the above

Answer

Correct Answer: 230 -26

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

252.
What will happen if you assign a value to an element of an array the
subscript of which exceeds the size of the array?

The element will be set to 0

Nothing; it is commonly done

It is undefined behavior

You will get an error message from the compiler

Answer

Correct Answer: You will get an error message from the compiler

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

253.
Given the operators:
1) *
2) /
3) %
What would be the order of precedence?

1,2,3

1,3,2

3,2,1

All have the same precedence

1 and 2 have the same precedence, 3 is of lower precedence

Answer

Correct Answer: All have the same precedence

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

254.
What would be printed on the standard output as a result of the
following code snippet?
#define max(a, b) ((a) > (b)?(a):(b))
main()

{
int a=4;
float b=4.5;
printf("%.2f\n",max(a, b));
}

Results in Compilation Error

Undefined value

4.50

4.0

None of the above

Answer

Correct Answer: 4.50

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

255.
What is the function to concatenate two strings?

strcmp()

strcpy()

strcat()

strlen()

catstr()

Answer

Correct Answer: strcat()

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

256.
Which is/are the type/s of memory allocation that needs/need the
programmer to take care of memory management?

Static memory allocation

Dynamic memory allocation

Automatic memory allocation

Memory allocation on stack

Memory allocation on heap

Answer

Correct Answer: Dynamic memory allocation
Memory allocation on stack

Note: This question has more than 1 correct answers

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

257.
Which of the following statements will result in a compilation error?

int n=5, x; x=n++;

int n=5, x; x= ++n++;

int n=5, x; x= (n+1)++;

int n=5, x=6; x= (n+x)++;

None of the above

Answer

Correct Answer: int n=5, x; x= ++n++;
int n=5, x; x= (n+1)++;
int n=5, x=6; x= (n+x)++;

Note: This question has more than 1 correct answers

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

258.
Which of the following is/are the correct signature/s of main with
command line arguments?

int main(int argc, char **argv)

int main(int argc, char *argv[])

int main(int argc, char *argv)

int main(int argc, char argv[])

All of the above

Answer

Correct Answer: int main(int argc, char **argv)
int main(int argc, char *argv[])

Note: This question has more than 1 correct answers

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

259.
What would be printed on the standard output as a result of the
following code snippet?
#define Name Manish
main()
{
printf("My name""Name");
}

My name Manish

My nameName

Results in Compilation Error

None of the above

Answer

Correct Answer: My nameName

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

260.
By which file function you can position the file pointer in accordance
with the current position?

ftell()

fseek()

fgetc()

fread()

fscanf()

Answer

Correct Answer: fseek()

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

261.
Which function will convert a string into a double precision quantity?

atoi()

atof()

atol()

atan()

acos()

Answer

Correct Answer: atof()

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

262.
What will be printed on the standard output as a result of the following
code snippet?
void main()
{
char arr1[] = "REGALINT";
printf("%d,",strlen(arr1));
printf("%d",sizeof(arr1));
}

1,1

8,4

8,8

8,9

9,8

Answer

Correct Answer: 8,9

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

263.
What will happen when the following code is executed?
void main()
{
char arr1[] = "REGALINT";
char *arr2;

arr2 = arr1;
printf("%d,",sizeof(arr1));
printf("%d",sizeof(arr2));
}

1,1

1,4

8,8

8,9

9,4

Answer

Correct Answer: 9,4

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

264.
Given the following array:
char books[][40]={
"The Little World of Don Camillo",
"To Kill a Mockingbird",
"My Family and Other Animals",
"Birds, Beasts and Relatives"
};
what would be the output of printf("%s",books[3]);?

Birds

Birds, Beasts and Relatives

My Family and Other Animals

Answer

Correct Answer: Birds, Beasts and Relatives

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

265.
What happens when the continue keyword is encountered in the 'for
loop'?

Control passes to the initialization of the loop

Control passes to the condition of the loop

Control passes to the beginning of the loop

Control passes to the first statement of the loop

Control passes to the statement preceding the end of the loop

Answer

Correct Answer: Control passes to the condition of the loop

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

266.
What will be printed on the standard output as a result of the following
code snippet?
void main()
{
char arr[] = {'R','A','M','\0'};

printf("%d",strlen(arr));
}

Cannot be determined

Answer

Correct Answer: 3

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

267.
Select the correct statement about arrays.

Automatic arrays cannot be initialized

An array declared as A[100][100] can hold a maximum of 10000 elements

An array can hold elements of different data types

Answer

Correct Answer: An array declared as A[100][100] can hold a maximum of 10000 elements

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

268.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
char pmessage = "asdfgh";
pmessage++;
printf("%s", pmessage);
return 0;
}

Will result in Compilation Error

Undefined string

sdfgh

asdfgh

Answer

Correct Answer: sdfgh

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

269.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
void addup (int b);
addup(b);
return 0;
}
int b = 5;

void addup (int b)
{
static int v1;
v1 = v1+b;
printf("%d ", v1);
}

Will result in Compilation Error

Undefined value

Answer

Correct Answer: Will result in Compilation Error

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

270.
The declaration int (p)[10] indicates:

p is an array of pointers to functions the return type of which is an integer

p is a pointer to a function that returns a pointer to an integer

p is a pointer to an array of integer pointers

p is a pointer to a character string

Answer

Correct Answer: p is a pointer to an array of integer pointers

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

271.
What is the return type of the following function declaration?
func(char c);

void

char

int

undefined

Answer

Correct Answer: void

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

272.
Read the statement below:
extern int a;

Which of the following statement/s pertaining to the above statement
is/are correct?

Declares an integer variable a; Allocates storage for the variable

Declares an integer variable a; Does not allocate the storage for the variable

Indicates that the variable is defined outside the current file

Brings the scope of the variable defined outside the file to this file

All of the above

None of the above

Answer

Correct Answer: Declares an integer variable a; Does not allocate the storage for the variable

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

273.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
enum {red, green, blue = 6, white};
printf("%d %d %d %d", red, green, blue, white);
return 0;
}

0 1 6 2

0 1 6 7

Will result in Compilation Error

None of the above

Answer

Correct Answer: 0 1 6 7

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

274.
What will be the output of the following program, assuming that data
type short takes 2 bytes for storage?
struct node
{
unsigned char bit1 : 1;
unsigned char bit2 : 1;
unsigned short bit3 : 7;
} node1;
main()
{
int size = sizeof(node1);

printf("%d", size);
}

None of the above

Answer

Correct Answer: 2

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

275.
What would be printed on the standard output as a result of the
following code snippet?
main()
{
int n=5, x;
x = n++;
printf("%d ", x);
x = ++n;
printf("%d ", x++);
printf("%d", x);

return 0;
}

6 7 8

5 7 8

6 8 8

5 8 8

None of the above

Answer

Correct Answer: 5 7 8

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

276.
Which of the following is a function for formatting data in memory?

sprintf()

printf()

scanf()

free()

atol()

Answer

Correct Answer: sprintf()

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

277.
What does the argv[0] represent?

The first command line parameter has been passed to the program

The program name

The number of command line arguments

None of the above

Answer

Correct Answer: The program name

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

278.
What will be printed on the standard output as a result of the following
code snippet?
void main()
{
int i,j,k;
i=4;

j=30;
k=0;
k=j++/i++;
++k;
printf("%d %d %d",i,j,k);
}

5 31 8

5 31 7

5 31 6

4 30 7

Answer

Correct Answer: 5 31 8

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

279.
Which function will convert a string into an integer?

int()

number()

atoi()

val()

tonum()

Answer

Correct Answer: atoi()

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

280.
Which function will you use to position the file pointer at the beginning
of the file?

rewind()

fseek()

fscanf()

a or b

b or c

Answer

Correct Answer: a or b

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

281.
Which function allocates memory and initializes elements to 0?

assign()

calloc()

malloc()

swab()

allocate()

Answer

Correct Answer: calloc()

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

282.
Which of the following sets of conversion statements may result in the
loss of data?

int i; char c; i=c; c=i;

int i; char c; c=i; i=c;

int i; float f; i=f; f=i;

None of the above

Answer

Correct Answer: int i; char c; c=i; i=c;
int i; float f; i=f; f=i;

Note: This question has more than 1 correct answers

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

283.
Which of the following is not a storage type?

auto

global

static

extern

Answer

Correct Answer: global

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

284.
Suppose there is a file a.dat which has to be opened in the read
mode using the FILE pointer ptr1, what will be the correct syntax?

ptr1 = open("a.dat");

ptr1 = fileopen("a.dat");

ptr1 = fopen("a.dat","r");

ptr1 = open("a.dat","r");

ptr1 = fileopen("a.dat","r");

Answer

Correct Answer: ptr1 = fopen("a.dat","r");

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

285.
Which header file are methods(or macros) isalpha(), islower() a part
of?

stdio.h

ctype.h

string.h

math.h

None of the above

Answer

Correct Answer: ctype.h

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

286.
Given the following array declaration:
int a[2][3][4]

what would be the number of elements in array a?

Answer

Correct Answer: 24

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

287.
Study the following code where num is an integer array and n is the
length of the array:
for(i=0;i<n-1;i++)
{

for(j=i+1;j<n;j++)
{
if(num[i] > num[j])
{
var=num[i];
num[i]=num[j];
num[j]=var;
}
}
}
What does the above code do?

It prints the elements of the array in the ascending order

It calculates the sum of the elements of the array

It sorts the array in the ascending order

It sorts the array in the descending order

It calculates the average of the elements of the array

Answer

Correct Answer: It sorts the array in the ascending order

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

288.
Read the following two declaration statements.
1. #include

2. #include "stdio.h"
Which of the following statements pertaining to the above two
statements are correct?

For statement 1, the header file will be searched first in the local directory and then in the standard system directories such as "/usr/include"

For statement 1, the header file will be searched in the standard system directories such as "/usr/include"

For statement 2, the header file will be searched first in the local directory and then in the standard system directories such as "/usr/include"

For statement 2, the header file will be searched in the standard system directories such as "/usr/include"

None of the above

Answer

Correct Answer: For statement 1, the header file will be searched in the standard system directories such as "/usr/include"
For statement 2, the header file will be searched first in the local directory and then in the standard system directories such as "/usr/include"

Note: This question has more than 1 correct answers

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

289.
What would be printed on the standard output as a result of the
following code snippet?
int Recur(int num)
{
if(num==1 || num==0)

return 1;
if(num%2==0)
return Recur(num/2)+2;
else
return Recur(num-1)+3;
}
int main()
{
int a=9;
printf("%d\n", Recur(a));
return 0;
}

None of the above

Answer

Correct Answer: 10

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

290.
What would be printed on the standard output as a result of the
following code snippet?
main( )
{
char *str[ ] = {
"Manish"
"Kumar"
"Choudhary"
};

printf ( "\nstring1 = %s", str[0] );
printf ( "\nstring2 = %s", str[1] );
printf ( "\nstring3 = %s", str[2] );
}

string1 = Manish string2 = Kumar string3 = Choudhary

string1 = Manish string2 = Manish string3 = Manish

string1 = ManishKumarChoudhary string2 = (null) string3 = (null)

You will get an error message from the compiler

Answer

Correct Answer: string1 = ManishKumarChoudhary string2 = (null) string3 = (null)

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

291.
Which of the following statements are correct for the keyword register?

It is a storage-class-specifier

It guarantees that the variable is kept in the CPU register for maximum speed

It requests that the variable be kept in the CPU register for maximum speed

It does not guarantee that the variable value is kept in CPU register for maximum speed

Answer

Correct Answer: It is a storage-class-specifier

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

292.
Which of the following is the correct way of initializing a two-dimensional array?

char str[2][4]={ "abc", "def" };

char str[2][4]={ {"abc"}, {"def"} };

char str[2][4]={ {'a','b','c','\0'}, {'d','e','f','\0'} };

a and b

a, b and c

Answer

Correct Answer: a, b and c

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

293. What will be the output of the following program: #include int main(){ int a,b; a= -3 - - 25; b= -5 - (- 29); printf("a= %d b=%d", a, b); return 0; }

a=22 b=34

a=22 b=24

a=28 b=34

a=28 b=24

Answer

Correct Answer: a=22 b=24

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

294. What will be output if you will execute following code? #include int main(){ float a=0.5, b=0.9; if(a&&b>0.9) printf("Sachin"); else printf("Rahul"); return 0; }

Compiler error

Sachin

Rahul

null

Runtime error

Answer

Correct Answer: Rahul

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

295. Which function is a System Call?

fopen

printf

Answer

Correct Answer: close

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

296. What will be output if you will execute following code? #include int main(){ int x=25; if(!!x) printf("%d",!x); else printf("%d",x); return 0; }

-1

Answer

Correct Answer: 0

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

297. memmove() is safer than memcpy() when it comes to the location of its arguments.

False

True

Answer

Correct Answer: True

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298. What is the output of the Program : int main() { int i,j; i=1,2,3; j=(1,2,3); printf("%d %d",i,j); return 0; }

0 0

1 1

1 3

Garbage Values of i & j

Compile Time Error

Answer

Correct Answer: 1 3

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299. For a pointer to a 3 dimensional array (*foo)[2][3][4], how many calls to malloc do you need at least to allocate its contents?

Answer

Correct Answer: 1

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

300. #include int main(){ int a=0; #if (a==0) printf("Equal"); #else if printf("Not equal"); #endif return 0; } Output of above program is:

Garbage

Null

Not equal

Equal

Compilation error

Answer

Correct Answer: Compilation error

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301. The operator used to get value at address stored in a pointer "p" is :

&(p)

**(p)

*(*p)

Answer

Correct Answer: *p

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302. What does malloc(0) return?

NULL

The program segfault

The behavior is implementation-defined

A unique pointer

Answer

Correct Answer: The behavior is implementation-defined

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303. What will this code print out? #include void function(char name) { name=NULL; } main() { char name="ELANCE"; function(name); printf("%s",name); }

ELANCE

NULL

Sengmentation Fault

It Won't Compile

Answer

Correct Answer: ELANCE

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

304. Which one is not a bitwise operator ?

Answer

Correct Answer: !

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

305. The main() function can be called recursively.

True

False

Answer

Correct Answer: True

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306. What is the output of printf("%d\n", sizeof(long) / sizeof(int))?

Depends on the implementation, but always some number > 1.

Depends on the implementation, but always some number >= 1.

Answer

Correct Answer: Depends on the implementation, but always some number >= 1.

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307. To send an array as a parameter to function, which one is a right way:

doThis(*array)

doThis(array[size])

doThis(&array)

doThis(array)

Answer

Correct Answer: doThis(array)

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

308. What will be the output of the following? (int)b * (float)a / (double)d * (long)c

double

long

float

int

Answer

Correct Answer: double

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

309. stdarg.h defines?

actual arguments

formal arguments

array definitions

arguments with data types

macros used with variable argument functions

Answer

Correct Answer: macros used with variable argument functions

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

310. What is the value of 1 & 2?

Answer

Correct Answer: 0

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

311. What will the following code print? void *p = malloc(0); printf ("%d\n", p);

Nothing, it will give a runtime error.

Nothing, it won't compile.

Unknown, it depends on what malloc will return.

Answer

Correct Answer: Unknown, it depends on what malloc will return.

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

312. What is the output of the following code? char * str1 = "abcd"; char * str2 = "xyz"; if( str1 < str2 ) printf( "1" ); else printf( "2" );

Undefined

Answer

Correct Answer: Undefined

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313. foo[4] is equivalent of :

*(&foo + 4)

(*foo + 4)

There is no equivalent using those notations

&(foo + 4)

*(foo + 4)

Answer

Correct Answer: *(foo + 4)

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

314. With: sizeof(char *) == 4 sizeof(char) == 1 What will sizeof(plop) for char plop[2][3] be?

Answer

Correct Answer: 6

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

315. What are the different types of floating-point data in C ?

float, double, long double

double, long int, float

short int, double, long int

float, double

Answer

Correct Answer: float, double, long double

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

316. How can you access the first element of an array called 'arr'?

arr[0]

(both of these)

*arr

Answer

Correct Answer: (both of these)

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

317. Which statement is true about double?

its size depends on the implementation

its size is 128 bits

it's an alias of float

it uses the GPU

Answer

Correct Answer: its size depends on the implementation

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318. Will this loop terminate? int x=10; while( x-- > 0 );

It will cause segfault

yes

It will not compile

Answer

Correct Answer: yes

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319. What is the value of p in int a,b,*p; p=&a; b=**p; printf("%d",p);

value of variable b

address of variable a

value of variable a

address of variable b

Answer

Correct Answer: address of variable a

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320. What will be the output of this Program? #include struct Data{ char a; char *data; int value; }; main() { printf("%d\n",sizeof(struct Data)); }

It depends on the compiler and the hardware architecture.

Answer

Correct Answer: It depends on the compiler and the hardware architecture.

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

321. The system function longjmp() can be used to return execution control to any user-specified point in the active function call tree.

False

True

Answer

Correct Answer: True

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

322. The end of a C statement is indicated by this character.

;

Answer

Correct Answer: ;

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

323. Which of the following is not a predefined variable type?

float

real

int

Answer

Correct Answer: real

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324. which of these is not valid keyword?

char

float

var

double

int

Answer

Correct Answer: var

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325. Which of the following is the correct operator to compare two integer variables?

equal

Answer

Correct Answer: ==

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

326. int *a, b; What is b ?

An int *

An int

It does not compile

Answer

Correct Answer: An int

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

327. Is C Object Oriented?

Yes

Answer

Correct Answer: No

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

328. int i = 17 / 3; what is the value of i ?

6.0

5.60

5.666666

Answer

Correct Answer: 5

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

329. In C language, && is a

None of them

Logical operator

Arithmetic Operator

Relational Operator

Answer

Correct Answer: Logical operator

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330. int tab[3] = {0,1,2}; int i = 0; tab[++i] == ?

Answer

Correct Answer: 1

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

331. In C, a block is defined by...

tabulations

332. If we pass an array as an argument of a function, what exactly get passed?

a[0]th value of array

a[last]th value of array

All elements of an array

Address of array

Answer

Correct Answer: Address of array

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333. What does "int *p = malloc(2);" do?

It will crash your program (an int is four bytes long, not two).

Nothing, it will yield a type mismatch compiler error.

It will make p point to an uninitialized two-byte piece of memory allocated from the heap.

It will make p point to the number 2.

Answer

Correct Answer: It will make p point to an uninitialized two-byte piece of memory allocated from the heap.

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

334. What is the value of the variable x? int x; x = 32 / 64;

0.5

Undefined

Answer

Correct Answer: 0

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

335. What is i after the following block of code is executed : int i; i = 10/5/2/1;

Answer

Correct Answer: 1

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336. #ifdef APPLE # include <dir/x.h> #else # include <other_dir/x.h> #endif What does it mean?

It will include dir/x.h if __APPLE__ is defined, or other_dir/x.h, otherwise.

It will define __APPLE__, include dir/x.h and next time will include other_dir/x.h

It will define __APPLE__ and include dir/x.h

It will include dir/x.h if __APPLE__ is not defined, or other_dir/x.h, otherwise.

Answer

Correct Answer: It will include dir/x.h if __APPLE__ is defined, or other_dir/x.h, otherwise.

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

337. How can you make an infinite loop in C?

for(;;) { }

while(1) { }

loop: ... goto loop;

All answers are right.

Answer

Correct Answer: All answers are right.

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338. Function Overloading is not supported in C.

True

False

Answer

Correct Answer: True

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339. A C variable can start with a digit as well a letter.

True

False

Answer

Correct Answer: False

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340. Which one is NOT a reserved keyword?

switch

static

extern

intern

struct

Answer

Correct Answer: intern

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

341. char* buf[100]; strcpy(buf, argv[1]); Which security risk is this code vulnerable to?

Format string

Stack overflow

Integer overflow

Race condition

Heap overflow

Answer

Correct Answer: Stack overflow

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

C Programming MCQs | Topic-wise

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Basic C Programming MCQ

1. When a structure is passed ________ to a function, its members are not copied.

2. If a condition in a post-test loop can never be met, the loop is an _________ loop.

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

4. The dynamic memory allocation functions are defined in which system header file ?

5. Void pointer vptr is assigned the address of float variable g. What is a valid way to dereference vptr to assign its pointed value to a float variable named f later in the program? float g; void *vptr=&g;

6. What does the ctype tolower() function do?

7. What standard data type provides the smallest storage size and can be used in computations?

8. What is the member access operator for a structure?

9. What is not one of the basic data types in C

10. Which line of code, after execution, results in i having the value of 1?

11. Which is not a storage class specifier?

12. Which operator is used to access the address of a variable?

13. Describe the relationship between lvalue and rvalue.

14. A Stack data structure allows all data operations at one end only, making it what kind of an implementation?

15. By default, C Functions are what type of functions?

16. The main loop structures in C programming are the for loop, the while loop, and which other loop?

17. Directives are translated by the?

18. File input and output (I/O) in C is done through what?

19. What does the strcmp(str1, str2); function return?

20. File input and output (I/O) in C is heavily based on the way it is done ___?

21. Compile time errors are static errors that can be found where in the code?

22. What is an alternative way to write the expression (*x).y?

23. What is the expression player->name equivalent to?

24. What is not a valid command with this declaration? char *string[20] = { "one", "two", "three"};

25. What is the difference between scanf() and sscanf() functions?

26. A union allows you to store different ___ in the same ___.

27. By default c uses the call by value method to pass arguments to functions. How can you invoke the call by reference method?

28. When is memory for a variable allocated?

29. In C language what are the basic building blocks that are constructed together to write a program?

30. Which function do you use to deallocate memory?

31. In which segment does dynamic memory allocation takes place?

32. C treats all devices, such as the display and the keyboard, as files. Which files opens automatically when a program executes?

33. What is optional in a function declaration?

34. In this code sample, what is not a problem for C compiler? main(){ constant int PI = 3.14; printf("%f\n", pi);}

35. What is not one of the reserved words in standard C?

37. A pointer to void named vptr, has been set to point to a floating point variable named g. What is the valid way to dereference vptr to assign its pointed value to a float variable named f later in this program? float g; void *vptr=&g;

38. What does the declaration of variable c2 demonstrate? main(){ char c1 ='a'; char c2 = c1+10;}

39. What is the name for calling a function inside the same function?

40. Each array element occupies an area in memory next to, or ____, the others.

41. Many programming languages include a string operation called __________.

42. A(n) ____ loop executes a predetermined number of times.

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

44. When an array is passed to a function, it is actually ________ the array that is/are passed.

45. After a program is coded, it must be ____________.

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

47. Function strcmp returns __________ if its first argument is equal to its second argument.

48. Objects in an array are accessed with ________, just like any other data type in an array.

49. Common ides include visual studio and ____.

50. Pointers are variables that contain __________ as their values.

51. Functions that do not have a return type are called ____ functions.

52. An inner loop goes through all of its iterations for every single iteration of the ________ loop.

53. A two-dimensional array contains two dimensions: ____.

54. ________ is a construct that defines objects of the same type.

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

56. The -- operator ________.

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

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

59. With pointer variables, you can ________ manipulate data stored in other variables.

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

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

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

63. When a character is stored in memory, it is actually the ________ that is stored.

64. Value is a function of ___________ and ___________?

65. Usually, when you create nested loops, each loop has its own ____.

66. Using the __________ cipher you choose some number by which to shift each letter of a text.

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

68. To use stream manipulators, you should include the ________ header file.

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

70. To create a macro, you can enter a series of commands in the _____ programming language.

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

72. This code is an example of a(n) ____ while loop.

73. The word “memory” consists of 48 bits, which is equivalent to _____ bytes.

74. The symbol used to represent a loop condition on a flowchart is the ____ symbol.

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

76. The purpose of the __________ is to get the first input value for the validation of a loop.

77. The pointer is indicating the _____.

78. The pl/sql block starts with the ____ clause.

79. The __________ function will return the number of characters in a given string.

80. Members of a(n) ________ union have names, but the union itself has no name.

26. A union allows you to store different _ in the same _.

64. Value is a function of _ and _?

83.
Choose the correct output of the given program.
#include
main()
{
struct b
{
int on:1;
};
struct b v = [1];
printf("%d\n", v.on);

}

84.
What would be the output of the given program?
int main()
{
int i =1, j=1;
for ( ; ; )
{
if ( i > 5 )
break;
else
j += i--;
Printf ( "%d\n", j );
i += j;
j= j+7;
}
return 0;
}

87.
Which of the following is used for dynamically allocating memory?

88.
Assuming, integer is 2 byte, What will be the output of the program? #include<stdio.h>int main() { printf("%x\n", -2<<2); return 0; }

89.
#pragma exit is primarily used for?

90.
Many features of C were derived from an earlier language called _____.

91.
#include are _ files and #include “somefile.h” __ files.

92.
Which of the following is an invalid identifier?

93.
#include <stdio.h>int main() { char *var = "Programming in C is fun."; } Which of the following format identifier can never be used for the variable var?

94.
Which of the following is not a Standard Predefined Macro?

95.
Which statement will you add in following program to work it correctly? #include<stdio.h>int main() { printf("%f\n",log(360.0)); return 0; }

96.
Considering that integer is 4 bytes long, what is the output of the following code? int main() { intfoobar=20, foo, bar; foo=&foobar; /* Assume address of foobar is 2100/ bar=foo; foo++=*bar++; foobar++; printf("foobar=%d, foo=%d, bar=%d\n", foobar, foo, bar); return 0; }

97.
Considering the following definition of a Union MyUnion, if int occupies 4 bytes, what is the memory size occupied by a variable of type MyUnion? union MyUnion { int foo; float bar; char foobar[16]; };

98.
If the storage size of unsigned int is 2 bytes, then the range of values of an unsigned integer is:

99.
Assuming integer is 4 bytes long and the address for 'i' is 2000, what is the output for the following code? int main() { int foo, bar, foobar, i=5; foobar = &i; bar = &foobar; foo = &bar; printf("%d, %d, %d\n", foobar, bar, foo); return 0; }

100.
Assuming integer takes 4 bytes and the starting address of the array 'foo' is 2000, what will be the output of the following code? int main() { int foo[2][3][4][5]; foo[2][3][4][5] = 50; printf("%d",((((foo+2)+3)+4)+5)); return 0; }

101.
If short takes 2 bytes of memory, what will be the output of the following program?

int main () {

short foobar[2][3] = { {1,5}, {9,8,7}}; printf("%d", sizeof(foobar)); return 0; }

102.
Which of the following statements are correct? Check all that apply.

103.
Bitwise operators can be used to generate random numbers.

104.
In order to fetch the address of a variable, we write preceding _____ sign before variable name.

105.
Which keyword is used to declare a variable so that the variable can be accessed by all the functions in all the modules of a program?

106.
Which function is called at program startup?

107.
Which of the following declaration is not supported by C?

108.
What does the following declaration mean? int(*ptr)[10];

109.
Which of the following is not a logical operator?

110.
What does argc and argv indicate in command-line arguments? (Assuming: int main(int argc, char *argv[]) )

111.
The keyword ‘break’ cannot be simply used within __?

112.
How will you free the allocated memory?

113.
How will you print \n on the screen?

114.
What is the built in library function to adjust the allocated dynamic memory size?

115.
Offset used in fseek() function call can be a negative number.

116.
Offset used in fseek() function call can be a negative number.

117.
Which of the following correctly shows the hierarchy of arithmetic operators in C?

118.
Which of the following operations can be performed on the file "NOTES.TXT" using the below code? FILE *fp; fp = fopen("NOTES.TXT", "r+");

119.
Which storage class is the default storage class for all local variables?

120.
Which keyword is used to retain value of a variable in multiple function invocations?

121.
An array elements are always stored in ____ memory locations.

122.
An array elements are always stored in ____ memory locations.

123.
An array elements are always stored in ____ memory locations.

124.
A file written in text mode can be read back in binary mode.

125.
Smallest element of an array is called as __.

126.
What is the output of the following program? main( ) { int foo = ('k' - 'j')/4; printf("foo = %d",foo); return 0; }

127.
For binary files, a ___ must be appended to the mode string.

128.
What type of array is generally generated in Command-line argument?

129.
Declare the following statement? "An array of three pointers to chars"

130.
Left shifting a number by 1 is always equivalent to multiplying it by 2.

131.
Which function is used to check if the end of the file has been reached in C?

132.
The maximum combined length of the command-line arguments including the spaces between adjacent arguments is

133.
What will be the output of the program ? #include<stdio.h> int main() { int a[5] = {5, 1, 15, 20, 25}; int i, j, m; i = ++a[1]; j = a[1]++; m = a[i++]; printf("%d, %d, %d", i, j, m); return 0; }

134.
Which header file should be included to use functions like malloc() and calloc()?

135.
Where is the file searched, when #include is used with angular brackets <>?

136.
Which of the following is not a Preprocessor Directive in C?

137.

#include <stdio.h> is a __?

138.

Which of the following are C preprocessors?

139.

C preprocessors can have compiler specific features.

140.

Consider the 32 bit compiler. We need to store address of integer variable to integer pointer. What will be the size of integer pointer ?

141.

What is (void*)0?

142.

What is the output of the following program? int main () { int foo = 1; do{ printf("%d ", foo); foo++; }while( foo <= 10 ) return 0; }

143.

What is used to convert a C program into machine language for execution?

144.

Pick the incorrect fopen statement:

145.

What is the output of the following code snippet? #include<stdio.h> main() { int x = 5; if(x=5) { if(x=5) break; printf("Hello"); } printf("Hi"); }

146.

Which function is used to de-allocate the memory allocated using malloc()?

147.

What will be the output of following code? int main() { int a=5; if(a=10) printf("Value of a=%d",a); else printf("Value of a=%d",a); return 0; }

148.

Which of the following is an invalid operator?

149.

What will be the output of following program? #include<stdio.h> int main() { int y=128; const int x=y; printf("%d\n",x); return 0; }