Circuit Breaker Pattern: Implement the Circuit Breaker pattern to detect failures?

Short answer: early and stop making requests to a service that is likely down, allowing time for recovery.

Real-world example (ShopNest)

If Payment is down, the Order service fails fast with a circuit breaker instead of hanging every checkout thread.

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.