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

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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