Interface - WHAT IS interface and why it is used?

Q: WHAT IS interface and why it is used?

It is used to achieve total abstraction. Since java does not support multiple inheritance in case of class, but by using interface it can achieve multiple inheritance . It is also used to achieve loose coupling. Interfaces are used to implement abstraction.

Answer

Achieving complete abstraction is the goal of its application. Although multiple inheritance is not supported by classes in Java, it is possible to achieve it through the use of interfaces. Loose coupling is another application for it. Abstraction is accomplished by the usage of interfaces.

Interface - WHAT IS interface and why it is used?

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