How would you answer an interview scenario involving Circuit Breaker pattern?

For an interview scenario involving Circuit Breaker pattern, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Circuit Breaker temporarily stops calls to a failing dependency after a threshold is reached. In this scenario, a downstream API is timing out and exhausting application threads. Explain how a circuit breaker changes the failure behavior. For production, tune thresholds from telemetry, combine with bounded retries and timeouts, expose circuit state, and define fallback behavior. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.