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Quiz: Feign and Circuit Breakers

5 questionsNo time limitPass: 60%+10 XP on first pass

Call one microservice from another with a declarative OpenFeign client, set timeouts, and survive failures with a Resilience4j circuit breaker and a fallback — tested with a fake service that returns errors.

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  1. Question 1

    What does an OPEN circuit breaker do?

  2. Question 2

    What do you write to call another service with OpenFeign?

  3. Question 3

    Which call is UNSAFE to retry automatically?

  4. Question 4

    In our test, course-api returns HTTP 500 for course 2. What does order-service answer?

  5. Question 5

    What is the HALF-OPEN state for?