why we use interface and abstract methods?

Question

Accepted Answer

Interfaces and abstract methods are used to achieve abstraction and provide a blueprint for classes to implement.

Interfaces allow for multiple inheritance and provide a contract for classes to adhere to.
Abstract methods define a method signature without implementation, allowing subclasses to provide their own implementation.
Interfaces and abstract methods promote code reusability and maintainability.
Interfaces can be used to achieve loose coupling and dependency injection.
Example: An interface 'ILogger' can define a method 'Log' which can be implemented by different logging classes like 'FileLogger' or 'DatabaseLogger'.

Accepted Answer

It helps to achieve Abstraction which is one of the pillar of OOPs concept.
It is mostly used for application design say SOLID Principles.

Accepted Answer

To support multiple inheritance(extensibility) , hide implementation , loose coupling

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