Explain the Command design pattern.

Explain the Command design pattern.

The Command design pattern is a behavioral design pattern that encapsulates a request as an object, thereby allowing users to parameterize clients with queues, requests, and operations. It decouples the sender of a request from its receiver, allowing multiple requests to be handled by different objects. The pattern consists of four main components: the Command, which defines the interface for executing an operation; the ConcreteCommand, which implements the Command interface and encapsulates the receiver object; the Receiver, which performs the actual operation; and the Invoker, which holds and executes the Command objects. This pattern promotes loose coupling, extensibility, and allows for the implementation of undo and redo operations.