The Facade design pattern is a structural pattern that provides a simplified interface to a complex subsystem consisting of a set of classes. It provides a unified interface to a set of functionalities in a subsystem, making it easier to use. Facade helps to reduce dependencies between client code and subsystems by providing a simplified interface to interact with a complex subsystem. For network applications, it can be used to reduce chattiness between two systems by providing a single endpoint that executes multiple operations on a remote system. In addition, this pattern encourages good programming practices such as abstraction, encapsulation, and loose coupling between subsystems. This is achieved by hiding the details of the subsystems behind the facade, which acts as a mediator between the subsystems and the clients. As a result, changes made to the subsystems are isolated from the clients, ensuring that any modifications to the system’s internal components will not affect the clients.
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