Which design pattern is most suitable for decoupling components in an…

The Observer pattern is the most suitable design pattern for decoupling components in an event-driven architecture. This pattern defines a one-to-many dependency between objects, where when one object (the subject) changes state, all its dependents (observers) are notified and updated automatically. In an event-driven system, components often need to react to events without knowing the specific source or implementation details of those events. The Observer pattern achieves loose coupling by allowing subjects to broadcast events without direct references to observers, enabling flexible and scalable communication. In contrast, the Singleton pattern restricts instantiation to a single object, which does not facilitate event distribution. The Factory pattern focuses on object creation rather than runtime communication, and the Adapter pattern is used to convert interfaces between incompatible objects. Therefore, Observer directly addresses the decoupling requirement in event-driven systems.