Spring Framework Technology & Digital Applications 2

Question 1

Which Spring Boot auto-configuration class sets up an embedded Tomcat server?

Accepted Answer

ServletWebServerFactoryAutoConfiguration

Answer

ServletWebServerFactoryAutoConfiguration triggers embedded server setup, delegating to factory beans like TomcatServletWebServerFactory.

Question 2

What is the purpose of Spring's @ConditionalOnMissingBean annotation?

Accepted Answer

Registers a bean only if no bean of that type already exists in the context

Answer

@ConditionalOnMissingBean allows auto-configuration to back off when the developer has already defined their own bean of that type.

Question 3

In Spring WebFlux, which scheduler is appropriate for blocking I/O operations?

Accepted Answer

Schedulers.boundedElastic()

Answer

Schedulers.boundedElastic() creates an elastic thread pool designed to offload blocking calls without starving the event loop.

Question 4

Which Spring Cloud component provides client-side load balancing integrated with the reactive WebClient?

Accepted Answer

Spring Cloud LoadBalancer

Answer

Spring Cloud LoadBalancer is the modern replacement for Ribbon and integrates natively with both WebClient and RestTemplate.

Question 5

What does the @EnableConfigurationProperties annotation do in a Spring Boot application?

Accepted Answer

Registers @ConfigurationProperties-annotated classes as Spring beans

Answer

@EnableConfigurationProperties scans for and registers classes annotated with @ConfigurationProperties so they are managed by the Spring container.

Spring Framework Practice Test