Spring Cloud Quality Control & Assurance 3

Question 1

Which Spring Cloud Contract annotation marks a method as a contract test that should be generated on the producer side?

Accepted Answer

@AutoConfigureStubRunner

Answer

@AutoConfigureStubRunner is placed on the consumer test class to auto-configure the WireMock stub runner with the producer's published stubs.

Question 2

What does the resilience4j.circuitbreaker.instances.<name>.slidingWindowType=COUNT_BASED mean?

Accepted Answer

Circuit breaker decisions are based on a fixed number of recent calls

Answer

COUNT_BASED means Resilience4j evaluates the last N calls (defined by slidingWindowSize) to decide whether to open the circuit.

Question 3

Which Spring Boot Actuator endpoint provides a live view of all active circuit breaker states?

Accepted Answer

/actuator/circuitbreakers

Answer

The /actuator/circuitbreakers endpoint (provided by resilience4j-spring-boot2) lists all circuit breaker instances and their current states.

Question 4

Which WireMock feature enables simulating delayed responses to test timeout handling in Spring Cloud microservices?

Accepted Answer

Fixed delay configuration on stub mappings

Answer

WireMock stub mappings support a fixedDelayMilliseconds field that instructs the mock server to delay its response by the specified duration.

Question 5

In Spring Cloud Kubernetes, which resource is watched to detect and apply configuration changes without a pod restart?

Accepted Answer

ConfigMap

Answer

Spring Cloud Kubernetes can watch ConfigMaps and automatically trigger a context refresh when the ConfigMap data changes.

Spring Cloud Practice Test