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Difference between abstract class and interface

Answer Posted / ashish gupta

1)Abstract class can have either declaration or definition
of any method,however an interface must declare a method
and it can not define it.

2)An interface makes some sort of contract to its
implementing classes to define all the declared methods
within those classes.

3)A class/subclass should Extend the abstract class while a
class/subclass should Implement the interface.

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