C++ MCQs with answers Page - 144

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. What is the output of the following code snippet? int x = 5; cout << x++;

  • (A) 5
  • (B) 6
  • (C) 0
  • (D) Error

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

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

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

  • (A) To delete memory
  • (B) To allocate memory
  • (C) To initialize variables
  • (D) To define functions

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Q. Which of the following is used to terminate a loop in C++?

  • (A) break
  • (B) exit
  • (C) stop
  • (D) return

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Q. What is the output of the following code snippet? int a = 10; int b = 20; cout << (a > b ? a : b);

  • (A) 10
  • (B) 20
  • (C) 0
  • (D) Error

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

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

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Q. What is the output of the following code snippet? int arr[3] = {1, 2, 3}; cout << arr[3];

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) Undefined behavior

A

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Q. Which of the following is used to define a macro in C++?

  • (A) #define
  • (B) #macro
  • (C) #include
  • (D) #ifdef

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Q. What is the output of the following code snippet? int x = 10; int &ref = x; ref = 20; cout << x;

  • (A) 10
  • (B) 20
  • (C) 0
  • (D) Error

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

  • (A) class MyClass { };
  • (B) class MyClass { public: };
  • (C) class MyClass { private: };
  • (D) All of the above

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