C++ MCQs (Chapterwise Multiple Choice Questions)

Which of the following is a valid variable identifier in C++?

m_test

1_str

class

Answer & Explanation

Correct Answer: m_test

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

Endorsers

Quantifiers

Validators

Testers

Answer & Explanation

Correct Answer: Validators

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

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

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

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

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

Answer & Explanation

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

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A class template is a _?

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

Blank superclass intended for inheritance and polymorphism.

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

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

Answer & Explanation

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

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

Per-swap

Inversion

Conversion

Temporary

Answer & Explanation

Correct Answer: Temporary

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

Implementation dependent

Yes

No, friend declarations are not transitive

Answer & Explanation

Correct Answer: No, friend declarations are not transitive

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

Variable

String

Implicit

Simple

Answer & Explanation

Correct Answer: Variable

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

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

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

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

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

Answer & Explanation

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

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What is the statement below equivalent to? sprite->x

Sprite.x

Sprite.*x

(*sprite).x

*sprite.x

Answer & Explanation

Correct Answer: (*sprite).x

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

Variables

Promp Lines

Expressions

Named Constants

Answer & Explanation

Correct Answer: Promp Lines

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C++ Quick Quiz

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