C++ miscellaneous MCQ question and answer with solution

1

What does the 'sizeof' operator return in C++?

A) Size of a data type in bits B) Size of a data type in bytes C) Size of a variable in bytes D) Size of a variable in bits

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Answer: Option C

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2

Which of the following is not a fundamental data type in C++?

A) Char B) Float C) String D) Double

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Answer: Option C

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3

What is the purpose of the 'static' keyword in C++?

A) To declare a variable with dynamic storage duration B) To declare a constant C) To declare a variable with external linkage D) To declare a variable with static storage duration

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Answer: Option D

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4

What is the difference between '++i' and 'i++' in C++?

A) None of the above B) They both have the same effect C) '++i' increments the value of 'i' before returning it, while 'i++' increments the value of 'i' after returning it D) '++i' increments the value of 'i' after returning it, while 'i++' increments the value of 'i' before returning it

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Answer: Option C

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5

What does the 'const' qualifier indicate in C++?

A) That the variable is a constant B) That the variable has dynamic storage duration C) That the variable has external linkage D) That the value of the variable cannot be changed

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Answer: Option D

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6

What is the purpose of the 'nullptr' keyword in C++?

A) To represent a null pointer B) To represent a null reference C) To represent a null character D) To represent a null value

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Answer: Option A

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7

What is the difference between 'delete' and 'delete[]' in C++?

A) None of the above B) 'delete' is used to deallocate memory allocated for an array of objects, while 'delete[]' is used to deallocate memory allocated for a single object C) They both have the same effect D) 'delete' is used to deallocate memory allocated for a single object, while 'delete[]' is used to deallocate memory allocated for an array of objects

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Answer: Option D

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8

What is the purpose of the 'inline' keyword in C++?

A) To declare a variable as inline B) To define a function as inline C) To suggest the compiler to inline the function call D) To declare a function as static

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Answer: Option C

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9

What is the purpose of the 'volatile' qualifier in C++?

A) To indicate that a variable should be optimized by the compiler B) To indicate that a variable may be modified by external factors C) To indicate that a variable should not be optimized by the compiler D) None of the above

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Answer: Option B

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10

Which of the following is a valid way to initialize a constant variable in C++?

A) Using the 'volatile' keyword B) Using the 'static' keyword C) Using the 'const' keyword D) Using the 'constexpr' keyword

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Answer: Option C

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C++ miscellaneous MCQ question and answer with solution | C++ Programimg MCQs