C++ MCQs with answers Page - 155

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 allocate memory dynamically for an integer in C++?

(A) new int;
(B) malloc(int);
(C) allocate int;
(D) int new();

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

(A) object->function();
(B) object.function();
(C) function(object);
(D) object.function();

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Q. Which of the following C++ features allows a class to inherit from another class?

(A) Overloading
(B) Abstraction
(C) Inheritance
(D) Encapsulation

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

(A) The size of a variable in bytes
(B) The number of elements in an array
(C) The size of the stack
(D) The size of the data type

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Q. Which C++ keyword is used to exit from a loop or switch statement?

(A) continue
(B) break
(C) exit
(D) return

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Q. Which of the following statements is correct about constructors in C++?

(A) A constructor has no return type.
(B) A constructor is called when an object is created.
(C) A constructor can have parameters.
(D) All of the above

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Q. What will be the output of the following code?

int a = 5;
int b = 2;
cout << a / b;

(A) 2.5
(B) 2
(C) 1
(D) Error

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Q. What is the output of the following code snippet? int x = 10; int y = 20; cout << (x <<= 1);

(A) 10
(B) 20
(C) 40
(D) Error

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Q. Which of the following is the correct way to define a function with a default argument in C++?

(A) void myFunction(int x = 10) { }
(B) void myFunction(int x) { }
(C) Both A and B
(D) None of the above

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Q. What is the output of the following code snippet? int x = 10; int y = 20; cout << (x >>= 1);

(A) 5
(B) 10
(C) 20
(D) Error

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C++ MCQs with answers Page - 155

Q. Which of the following is the correct way to allocate memory dynamically for an integer in C++?

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

Q. Which of the following C++ features allows a class to inherit from another class?

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

Q. Which C++ keyword is used to exit from a loop or switch statement?

Q. Which of the following statements is correct about constructors in C++?

Q. What will be the output of the following code? int a = 5; int b = 2; cout << a / b;

Q. What is the output of the following code snippet? int x = 10; int y = 20; cout << (x <<= 1);

Q. Which of the following is the correct way to define a function with a default argument in C++?

Q. What is the output of the following code snippet? int x = 10; int y = 20; cout << (x >>= 1);

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Q. What will be the output of the following code?

int a = 5;
int b = 2;
cout << a / b;