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Classes and Objects Interview Questions

MCQ Question 1 of 10

Question 1: C++ OOPS - Class Definition

Which keyword is used to define a class in C++?

struct

class

object

define

Question 2: C++ OOPS - Object Creation

Which of the following correctly creates an object of class Car?

Car();

Car car;

class Car car;

new Car;

Question 3: C++ OOPS - Access Specifiers

By default, members of a C++ class are:

public

private

protected

static

Question 4: C++ OOPS - Member Function Declaration

Where can member functions of a class be defined?

Only inside the class

Only outside the class

Both inside and outside the class

Nowhere

Question 5: C++ OOPS - Object Access

Which operator is used to access class members via an object?

Question 6: C++ OOPS - Pointer to Object

If Student *ptr; is a pointer to a Student object, how can we call its function show()?

ptr.show();

ptr->show();

*ptr.show();

show.ptr();

Question 7: C++ OOPS - Constructors

What is true about constructors in C++?

They have the same name as the class

They return void

They can be called explicitly like normal functions

They must always be private

Question 8: C++ OOPS - Destructor

Which symbol is used before the class name to define a destructor?

Question 9: C++ OOPS - Object Initialization

Which of the following initializes an object car of class Car with a constructor taking two arguments?

Car car = new Car(10, "BMW");

Car car(10, "BMW");

car.Car(10, "BMW");

Car(10, "BMW") car;

Question 10: C++ OOPS - Object Lifetime

When is a destructor of a class called automatically?

When an object is declared

When an object goes out of scope

Only if explicitly called

At the start of program execution