NOTE FOR JAVA BY MUKUL SINHA SIR
Revision of Class IX Syllabus Unit1 : INTRODUCTION TO OBJECT-ORIENTED CONCEPTS VERY SHORT & SHORT ANSWER TYPE QUESTIONS Q1. Name two OOP principles. Ans :- Encapsulation and Abstraction are two OOP's principles. Other principles are Polymorphism, Inheritance, Dynamic Binding and Message Passing Q2. What is an Object? Ans :- An object is an identifiable entity, which contains characteristics and behaviors. To create an object in Java we write Employee e =new Employee(); Q3. What is Polymorphism? Ans :- Polymorphism is an act of using a function for more than one purpose. Example of Polymorphism public class Addition { int sum; public void Add(int a, int b) { sum=a+b; } public void Add(int a, int b,int c) //this method overloads previous Add method { sum=a+b+c; } } Here Add functi...