C++ MCQs with answers Page - 143

Here, you will find a collection of MCQ questions on C++. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which of the following is the correct way to define a constant pointer in C++?

  • (A) int* const ptr;
  • (B) const int* ptr;
  • (C) int const* ptr;
  • (D) const ptr* int;

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Q. What is the purpose of the 'new' keyword in C++?

  • (A) To allocate memory on the stack
  • (B) To deallocate memory
  • (C) To allocate memory on the heap
  • (D) To define a constant

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Q. Which of the following is not a valid C++ loop?

  • (A) for
  • (B) while
  • (C) repeat
  • (D) do-while

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Q. Which operator is used to allocate memory dynamically in C++?

  • (A) malloc()
  • (B) calloc()
  • (C) new
  • (D) alloc()

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Q. What is the default access specifier for class members in C++?

  • (A) private
  • (B) public
  • (C) protected
  • (D) friend

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Q. Which of the following is a keyword in C++?

  • (A) var
  • (B) auto
  • (C) integer
  • (D) staticx

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Q. What is the purpose of the 'delete' keyword in C++?

  • (A) To deallocate memory
  • (B) To allocate memory
  • (C) To delete a variable
  • (D) To stop program execution

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Q. Which of the following is not a valid C++ data type?

  • (A) int
  • (B) float
  • (C) decimal
  • (D) double

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Q. What is the purpose of the 'namespace' in C++?

  • (A) To define a class
  • (B) To avoid name conflicts
  • (C) To store variables globally
  • (D) To allocate memory

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Q. Which of the following is the correct syntax to include a header file in C++?

  • (A) #include <iostream>
  • (B) #include [iostream]
  • (C) #include {iostream}
  • (D) #include 'iostream'

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