Spring Boot Auto-Configuration and Starters 3

Question 1

Which annotation would you use to prevent a specific auto-configuration class from loading in tests?

Accepted Answer

@EnableAutoConfiguration(exclude=…)

Answer

@EnableAutoConfiguration(exclude={SomeAutoConfig.class}) and its spring.autoconfigure.exclude property both prevent named auto-configurations from loading.

Question 2

What does spring-boot-starter-actuator provide out of the box?

Accepted Answer

Production-ready endpoints for health, metrics, and application info

Answer

spring-boot-starter-actuator adds Actuator endpoints such as /actuator/health, /actuator/metrics, and /actuator/info.

Question 3

When two auto-configuration classes need to be ordered relative to each other, which annotations can express that ordering?

Accepted Answer

@AutoConfigureBefore and @AutoConfigureAfter

Answer

@AutoConfigureBefore and @AutoConfigureAfter let auto-configurations declare ordering dependencies without requiring explicit bean wiring.

Question 4

Which condition annotation checks whether a specific Spring property has a particular value before applying a configuration?

Accepted Answer

@ConditionalOnProperty

Answer

@ConditionalOnProperty(name='feature.enabled', havingValue='true') applies configuration only when the property matches the specified value.

Question 5

What is the difference between spring-boot-starter and spring-boot-starter-test?

Accepted Answer

spring-boot-starter provides core auto-configuration; spring-boot-starter-test adds JUnit, Mockito, and AssertJ scoped to test

Answer

spring-boot-starter-test is a test-scoped starter bundling JUnit 5, Mockito, AssertJ, and Spring Test utilities, while spring-boot-starter provides core logging and auto-configuration.

Spring Boot Practice Test

Spring Boot Practice Test

Spring Boot Auto-Configuration and Starters 3