Difference between Base Class, Derived Class , Abstract Class and Concrete Class ?
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 Q1. Difference between Base Class, Derived Class , Abstract Class and Concrete Class ?Core Java2019-01-20 10:09:38

Ans. Base Class is a relative term used to signify the Parent class in Parent - Child or Base - derived relationship.

Derived Class is a relative term used to signify the Child class in Parent - Child or Base - derived relationship.

Abstract Class is a class that is not allowed to be instantiated and hence can serve only a base class for it's usage.

Concrete Class is the class which is supposed to be instantiated and hence provide definition for all implementing interface methods and extending abstract methods.

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