Abract class and interface

Question

In company project for sending request the have taken abstract classes and for receiving took interface

what is the need of taking both classes we can do request and response using normal classes pls explain me clearly with real world example pls

everyone here is saying only google definitions i pls neglect google definitions. explain me from ur experiences..

Tuhin Paul · Answer

In software development, it's common to use abstraction to create modular, reusable code that can be easily maintained and extended. Abstract classes and interfaces are both ways of achieving abstraction in object-oriented programming. An abstract class is a class that cannot be instantiated on its own and is used as a base class to provide common functionality to its derived classes. It can have both abstract and non-abstract methods, and it provides a way to define a common interface for a set of classes. On the other hand, an interface is a contract that defines a set of methods that a class must implement. It provides a way to define a common behavior that can be shared by unrelated classes. A class can implement multiple interfaces, but it can only inherit from one abstract class. Now, coming to the question of why an abstract class is used for sending requests and an interface is used for receiving responses, it's possible that this design decision was made to create a separation of concerns between the two operations. The abstract class could contain common functionality that is shared across different types of requests, while the interface could define a set of methods that must be implemented by the classes that handle responses. This allows for greater flexibility and modularity in the code. As for a real-world example, let's take the case of a messaging application that allows users to send and receive messages. The abstract class could contain common functionality for sending messages, such as authentication and error handling. The interface could define a set of methods that must be implemented by classes that handle incoming messages, such as parsing the message and displaying it in the user interface. This separation of concerns allows for easier maintenance and extensibility of the code, as the functionality for sending and receiving messages can be developed and tested independently.