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Answer Posted / devendra.m
Both Absstract classes and interfaces can be used when there
is a difference in subclass types.
When subclass type is totally different then implement the
interfaces.When subclass type is partially common in the
super type then extends the abstract class.Internally some
comman behaviour is there incase of abstract classes.
incase of interface we can achieve multiple inheritace.but
incase of classes we can not achieve multiple inheritace.
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