Spring Framework Professional Standards & Competencies 4

Question 1

A senior Spring developer is reviewing code that uses @Autowired on a field marked as non-final. What concern should they raise?

Accepted Answer

Field injection hides dependencies and complicates unit testing

Answer

Field injection hides required dependencies from the class API and requires a Spring container even for simple unit tests.

Question 2

What is the correct professional approach to validate request body data in a Spring MVC REST controller?

Accepted Answer

Use Bean Validation with @Valid and a @ControllerAdvice for error handling

Answer

@Valid triggers Bean Validation (JSR-380) on the request body, and @ControllerAdvice centralizes error responses.

Question 3

Which approach is the Spring professional standard for caching expensive method results?

Accepted Answer

Using @Cacheable with a configured CacheManager

Answer

@Cacheable backed by a configured CacheManager (e.g., Caffeine, Redis) provides declarative, consistent caching across the application.

Question 4

A professional is designing a Spring application that must publish and consume domain events within the same application. What is the recommended approach?

Accepted Answer

Use ApplicationEventPublisher with @EventListener

Answer

ApplicationEventPublisher and @EventListener provide Spring's built-in in-process event mechanism for decoupled component communication.

Question 5

When profiling a Spring Boot application in production, which embedded actuator endpoint set should a professional expose with caution?

Accepted Answer

/actuator/env and /actuator/heapdump

Answer

/actuator/env can expose sensitive properties and /actuator/heapdump can expose heap data; both require strict security controls in production.

Spring Framework Practice Test

Spring Framework Practice Test

Spring Framework Professional Standards & Competencies 4