Monday, 3 August 2015

Java Interview Question Answer

Ques 31. What is the advantage of OOP?
Ans. You will get varying answers to this question depending on whom you ask. Major advantages of OOP are: 
1. Simplicity: software objects model real world objects, so the complexity is reduced and the program structure is very clear; 
2. Modularity: each object forms a separate entity whose internal workings are decoupled from other parts of the system; 
3. Modifiability: it is easy to make minor changes in the data representation or the procedures in an OO program. Changes inside a class do not affect any other part of a program, since the only public interface that the external world has to a class is through the use of methods; 
4. Extensibility: adding new features or responding to changing operating environments can be solved by introducing a few new objects and modifying some existing ones; 
5. Maintainability: objects can be maintained separately, making locating and fixing problems easier; 
6. Re-usability: objects can be reused in different programs
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