Spring Cloud Quality Control & Assurance 5

Question 1

Which Spring Boot test annotation should you use to test only the web layer (controllers) without loading the full application context?

Accepted Answer

@WebMvcTest

Answer

@WebMvcTest loads only MVC components (controllers, filters, converters) and auto-configures MockMvc without service or repository beans.

Question 2

How does Spring Cloud Sleuth integrate with Logback to include trace information in log output?

Accepted Answer

By automatically adding traceId and spanId to the MDC (Mapped Diagnostic Context)

Answer

Sleuth populates MDC keys (traceId, spanId, exportable) so any Logback pattern using %X{traceId} automatically includes distributed trace context.

Question 3

What is the role of the Spring Cloud Contract Stub Runner in consumer-side tests?

Accepted Answer

It downloads and starts WireMock stubs published by the producer for use in consumer tests

Answer

Stub Runner fetches the published stubs JAR from a local or remote Maven repository and launches WireMock with those stubs, simulating the producer.

Question 4

Which Resilience4j module provides time-limited execution for Spring Cloud service calls to prevent thread starvation?

Accepted Answer

TimeLimiter

Answer

TimeLimiter cancels a call that exceeds a configured duration, preventing threads from blocking indefinitely on slow downstream services.

Question 5

When writing a Spring Cloud Gateway integration test, which test utility allows you to make HTTP requests to the gateway and assert responses?

Accepted Answer

WebTestClient

Answer

WebTestClient is the reactive-compatible HTTP client used in Spring WebFlux and Spring Cloud Gateway tests for making assertions on reactive HTTP responses.

Spring Cloud Practice Test

Spring Cloud Practice Test

Spring Cloud Quality Control & Assurance 5