Ease of Maintenance:?

Short answer: The state-specific behavior is encapsulated within its corresponding class, making it easier to add or modify states without affecting the rest of the system. You can add new states without altering the existing code too much. When to Use the State Pattern:

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.