Inheritance

Question 1

What is the purpose of the ‘this’ keyword in Java?

Answer 1

The this keyword refers to the current instance of the object.

In the case of method overriding, this is used for calling the method of the current class.

Question 2

Explain the concept of Inheritance?

Answer 2

Some objects share certain characteristics and behaviour. By using Inheritance, we can put the common behaviour and characteristics in a base class which is also known as a super class. Inheritance promotes code reuse, method overriding and polymorphism.

Question 3

What is the purpose of “super” keyword in java?

Answer 3

The super keyword refers to the immediate parent class of an object. Using super we can call a method of the parent class from the method of a child class.