Some Questions about OOP

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Can any one reply these questions?

1. How can we decide when to use Abstraction or interfaces( ie In which scenario we decide to use either of one)

2. What is the advantage of using Abstraction?

Kindly provide some real life examples

Posted 2-Oct-11 20:07pm

Syed Salman Raza Zaidi

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RaisKazi · Answer 1 · 2011-10-02T21:28:00

First let me clear one thing, their is difference between terms "Abstraction" and "Abstract Class".

I guess you want to know difference between "Interface" and "Abstract Class".

Below Article may help you in understanding "Abstraction", "Abstract Class" and "Interface".
Introduction to Object Oriented Programming Concepts (OOP) and More

Updated -
Here is one more good Article on Object Oriented Programming concepts.
How I explained OOD to my wife

CodingLover · Answer 2 · 2011-10-02T20:17:00

Solution 1

If you read the following, you can have a better idea.

Abstract Class versus Interface[^]

Posted 2-Oct-11 20:17pm

CodingLover

Simon Bang Terkildsen · Answer 3 · 2011-10-02T20:31:00

Here's a short answer

1) Go for an abstract class when the sub classes will share behavior, so the concrete implementation of these shared behaviors would be placed in the abstract class. if the sub types won't share behavior go for an interface.

2) You can implement behaviors/features in an abstract class which you can't with an interface. However it's only an advantage if the sub classes share these behaviors/features.

I suggest you read this book Object-Oriented Software Construction[^] if want very good insight into software design.

Some Questions about OOP

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