C++ MCQs with answers Page - 154

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Q. Which of the following C++ features is used to achieve polymorphism?

  • (A) Function Overloading
  • (B) Function Overriding
  • (C) Both A and B
  • (D) None of the above

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Q. What is the output of the following code in C++?

int a = 10;
int b = 3;
cout << a % b;

  • (A) 3
  • (B) 1
  • (C) 10
  • (D) Error

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Q. Which of the following data types can store floating-point numbers in C++?

  • (A) int
  • (B) double
  • (C) char
  • (D) boolean

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Q. Which of the following is true about C++ arrays?

  • (A) Arrays in C++ can store elements of different data types.
  • (B) The size of an array is fixed and cannot be changed after declaration.
  • (C) Arrays in C++ start at index 1.
  • (D) C++ arrays do not have a fixed size.

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Q. Which of the following C++ operators is used to dereference a pointer?

  • (A) *
  • (B) &
  • (C) ->
  • (D) ::

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Q. Which of the following is the correct syntax to include a C++ library?

  • (A) #include <iostream>
  • (B) import <iostream>
  • (C) include <iostream>
  • (D) use <iostream>

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

  • (A) To define a global variable
  • (B) To define a constant variable
  • (C) To limit the scope of a variable to its function
  • (D) To make a variable accessible to all functions

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Q. Which of the following is the correct way to declare an array of 5 integers in C++?

  • (A) int arr[5];
  • (B) int[5] arr;
  • (C) arr[5] int;
  • (D) int[] arr;

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Q. Which of the following C++ classes is used for handling input and output?

  • (A) fstream
  • (B) iostream
  • (C) stdio
  • (D) outputstream

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Q. Which C++ function is used to get the length of a string?

  • (A) length()
  • (B) size()
  • (C) strlen()
  • (D) getLength()

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