What is the difference between an Abstract class and Interface?
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Answer Posted / Vandana Barya
An Abstract Class is a class that contains both abstract methods (methods without implementation) and concrete methods (methods with implementation). It can be instantiated but cannot be used until all its abstract methods are implemented by subclasses. An Interface, on the other hand, only defines methods (both abstract and public) without any implementation. A class implements an interface to adhere to a contract of methods it must provide.
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