beginnerResilience Patterns (Resilience4j)

What is the Circuit Breaker pattern? Explain Open, Closed, and Half-Open states.

Tests whether you know how a circuit breaker stops hammering a failing downstream service and how it decides to retry.

Ready to master this question?

Generate a complete walkthrough — background, the full answer in plain language, a working code example explained line by line, a real-world scenario, common mistakes, and how this same question gets asked in different ways.

Next Step

Continue to Where would you store an idempotency key, and how do you handle two concurrent requests arriving with the same key? →← Back to all Spring Boot & Microservices questions