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What is the difference between abstract class and interface?

April 26, 2017abstract class interface

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What is the difference between abstract class and interface?

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10 Posted

Ans: a) All the methods declared inside an interface are abstract whereas abstract class must have at least one abstract method and others may be concrete or abstract. b) In abstract class, key word abstract must be used for the methods whereas interface we need not use that keyword for the methods. c) Abstract class must have subclasses whereas interface can’t have subclasses.