Component (ICoffee): ○ This is the base interface that defines the common methods for the Cost()?

Short answer: And Description() that every coffee component will implement.

Explain a bit more

public interface ICoffee { double Cost(); string Description(); } nd Description() that every coffee component will implement. public interface ICoffee { double Cost(); string Description(); } And Description() that every coffee component will implement. public interface ICoffee { double Cost(); string Description(); } nd Description() that every coffee component will implement. public interface ICoffee { double Cost(); string Description(); }

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.