Answers

1. The Decorator pattern allows us to dynamically add new functionality to an object at runtime without modifying its original code, promoting flexibility, testability, and manageability.
2. Yes, we can decorate decorators by depending only on interfaces because they are just another implementation of the interface, nothing more.
3. The Composite design pattern aims to simplify handling complex structures by treating individual and group elements indistinguishably.
4. Yes, we could use an adapter for this.
5. The Adapter pattern’s primary responsibility is to adapt one interface to work with another interface that is incompatible with direct use.
6. The Adapter and Façade design patterns are almost the same but are applied to different scenarios. The Adapter pattern adapts an API to another API, while the Façade pattern exposes a unified or simplified API, hiding one or more complex subsystems.
7. An Opaque façade hides most of the...