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Answer Posted / mayank bhatnagar
Interface includes just the definition of methods whereas
Abstract Classes are just like classes and hold all
functionality of classes except certain features.
The only difference between Abstarct Classes and Interfaces
is the use.Abstract Classes were introduced becoz of
diamond problem in C,C++.You can only inherit these classes
but cannot instantiate(i.e. no object of these classes can
be created, there can be one or more methods abstact in
such classes).
Interfaces are public and can be used/inherited by multiple
classes which was not before possible.
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