How does the Command pattern work?

Short answer: Encapsulates a request as an object with methods to execute and possibly undo the operation. The invoker calls commands without knowing the action details, supporting decoupling and flexible request handling.

Real-world example (ShopNest)

Patterns in ShopNest should solve a real pain (swappable payments, test seams)—not be added for decoration.

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.