Java Interview Guide : 200+ Interview Questions and Answers - Object Basics - Class, Object, State and Behavior

The video tutorial explains the basics of object-oriented programming, focusing on the concept of classes as templates for creating objects. It details how classes define the state and behavior of objects, using a cricket scorer example to illustrate these concepts. The tutorial also covers the nature of objects as instances of classes and discusses the superclass of all classes in Java, highlighting the methods inherited from the object class.

What is a class in object-oriented programming?

• A specific instance of an object

• A function for executing code

• A method for defining variables

• A template for creating objects

What does the state of an object represent?

• The methods it can execute

• The values of its instance variables

• The number of objects created

• The class it belongs to

How can the state of an object change?

• Through the methods it supports

• By creating new classes

• Through inheritance

• By deleting instance variables

What defines the behavior of an object?

• The values of its variables

• The number of instances

• The methods it supports

• The class it belongs to

Which class is the superclass of all classes in Java?

• String

• Object

• HashMap

• ArrayList

What is inherited from the Object class in Java?

• Only the clone method

• All methods defined in the Object class

• No methods are inherited

• Only the toString method

Which of the following is NOT a method inherited from the Object class?

• add

• notify

• hashCode

• equals