Explore topic-wise MCQs in C++ Programming.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your C++ Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

When destructors are called?

A. When a program ends
B. When a function ends
C. When a delete operator is used
D. All of the mentioned
Answer» E.
Discussion
2.

What is syntax of defining a destructor of class A?

A. A(){}
B. ~A(){}
C. A::A(){}
D. ~A(){};
Answer» C. A::A(){}
Discussion
3.

What is the role of destructors in Classes?

A. To modify the data whenever required
B. To destroy an object when the lifetime of an object ends
C. To initialize the data members of an object when it is created
D. To call private functions from the outer world
Answer» C. To initialize the data members of an object when it is created
Discussion
4.

How many types of constructors are there in C++?

A. 1
B. 2
C. 3
D. 4
Answer» D. 4
Discussion
5.

How constructors are different from other member functions of the class?

A. Constructor has the same name as the class itself
B. Constructors do not return anything
C. Constructors are automatically called when an object is created
D. All of the mentioned
Answer» E.
Discussion
6.

How many parameters does a default constructor require?

A. 1
B. 2
C. 0
D. 3
Answer» D. 3
Discussion
7.

What happens if a user forgets to define a constructor inside a class?

A. Error occurs
B. Segmentation fault
C. Objects are not created properly
D. Compiler provides a default constructor to avoid faults/errors
Answer» E.
Discussion
8.

What is a copy constructor?

A. A constructor that allows a user to move data from one object to another
B. A constructor to initialize an object with the values of another object
C. A constructor to check the whether to objects are equal or not
D. A constructor to kill other copies of a given object.
Answer» C. A constructor to check the whether to objects are equal or not
Discussion
9.

Why constructors are efficient instead of a function init() defined by the user to initialize the data members of an object?

A. Because user may forget to call init() using that object leading segmentation fault
B. Because user may call init() more than once which leads to overwriting values
C. Because user may forget to define init() function
D. All of the mentioned
Answer» E.
Discussion
10.

What is the role of a constructor in classes?

A. To modify the data whenever required
B. To destroy an object
C. To initialize the data members of an object when it is created
D. To call private functions from the outer world
Answer» D. To call private functions from the outer world
Discussion