Loose Coupling:?

Short answer: The Mediator Pattern decouples objects from each other by centralizing communication through the mediator. Users don't need to know about each other and only communicate via the mediator. This reduces dependencies and makes the system easier to maintain.

Real-world example (ShopNest)

Use a GoF pattern in ShopNest only when it removes duplication or makes a change safer—explain the problem it solves in the interview.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.