Classes And Objects

Question 1

What is a class?

Answer 1

A blueprint or template for creating objects. It defines the properties (fields) and behaviors (methods) that the objects will have.

Question 2

What is an object?

Answer 2

An instance of a class. It contains the actual values for the fields defined in the class, and can call methods that the class defines.

Question 3

How do you create an object from a class?

Answer 3

Use the new keyword followed by a constructor of the class.
(MyClass obj = new MyClass();)

Question 4

What is a constructor?

Answer 4

A special method used to initialize objects when they are created. It has the same name as the class and does not return a value.

Question 5

What is the purpose of the ‘this’ keyword?

Answer 5

The ‘this’ keyword refers to the current instance of the class. It is used to distinguish instance variables from parameters with the same name.