Spring Boot & Auto-Configuration Flashcards

What Spring Boot Actuator endpoint shows the health status of the application?

Answer: /actuator/health

The /actuator/health endpoint aggregates health indicators and returns the overall UP or DOWN status of the application.

Which annotation conditionally registers a bean only if another specific bean is present?

Answer: @ConditionalOnBean

@ConditionalOnBean registers a bean in the context only if one or more specified beans are already present in the BeanFactory.

In Spring Boot, what is the purpose of application profiles?

Answer: To load different configurations based on the active environment (dev, test, prod)

Spring profiles allow you to define environment-specific beans and configuration properties, activated via spring.profiles.active.

What does the @SpringBootTest annotation do?

Answer: Loads the full application context for integration testing

@SpringBootTest bootstraps the complete Spring application context for integration tests, making it useful for testing end-to-end behavior.

What property sets the embedded server port in Spring Boot?

Answer: server.port

The server.port property in application.properties configures the port that the embedded server (Tomcat by default) listens on.

How do you bind a group of related properties to a Java object in Spring Boot?

Answer: Using @ConfigurationProperties on a class with a prefix

@ConfigurationProperties binds external configuration properties with a common prefix to fields of a POJO, enabling type-safe configuration.