Answer Posted / ravi anand pathak

1)-Abstract class required two key word for declaring
abstract class.
Interface required interface keyword for declaring the
interface.
2)-Within abstract class we can declare concrite and
abstract both type of method.
Interface support only abstract method.
3)-Variable declared within abstract class are normal.
All variables are emplicitly final,public static within
interface.
4)-We required abstract keyword to declared abstract
keyword.
All methods areemplicitlypublic and abstract.
5)-We use extends kyeword to inheriate any abstract class.
We use implements kyeword to use interfaces.
6)-Only one abstract class can extends at a time(single
inheritence).
We can use multipleinterface in a class at asame time(just
like multiple overriding).

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