Give real time scenario where have you used abstract class and interface

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Accepted Answer

Abstract classes and interfaces are used to achieve abstraction and provide a blueprint for classes to implement.

Used abstract class to create a base class for different types of vehicles, with common properties and methods.
Used interface to define a contract for different payment methods, with each method implementing its own logic.
Abstract classes are used when we want to provide a default implementation for some methods, while leaving others to be implemented by the derived classes.
Interfaces are used when we want to define a set of methods that a class must implement, without providing any implementation details.
Abstract classes can have constructors, while interfaces cannot.
A class can implement multiple interfaces, but can only inherit from one abstract class.

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