Products (FileLogger, ConsoleLogger):?

Short answer: The ILogger interface is implemented by the concrete classes FileLogger and ConsoleLogger. These classes define how the log message will be handled, either by writing to a file or outputting to the console.

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.