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C# and .NET interview questions: -What is the differences between abstract class and interface?

• By Shiv Prasad Koirala in C#
• Sep 7th, 2011
• 11577
• 1

C# and .NET interview questions: - What is the differences between abstract class and interface?
 

                                                                                                                                                               

	Abstract class	Interface
Implementation	Some methods in abstract classes can have         implementation.	All methods, function, properties in interfaces have to         empty compulsorily.
Scenario	Abstract classes are used when we want to share common         functionality in parent child relationship.	Interfaces are used to define contract, enforce         standardization, decoupling and dynamic polymorphism.
Variable declaration	We can declare variables	In interface we cannot do that.
Inheritance vs Implementation	Abstract classes are inherited.	Interfaces are implemented.

           

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