Spring Framework Spring Framework 2

Question 1

Which annotation in Spring Boot enables auto-configuration, component scanning, and configuration in a single annotation?

Accepted Answer

@SpringBootApplication

Answer

@SpringBootApplication combines @EnableAutoConfiguration, @ComponentScan, and @Configuration into one meta-annotation.

Question 2

What is the purpose of the @Transactional annotation in Spring?

Accepted Answer

To manage database transactions declaratively

Answer

@Transactional tells Spring to wrap the method in a transaction, committing on success and rolling back on unchecked exceptions.

Question 3

Which Spring module provides support for creating RESTful web services?

Accepted Answer

Spring MVC

Answer

Spring MVC (part of Spring Web) provides @RestController and @RequestMapping to build RESTful APIs.

Question 4

What does Spring's @Value annotation do?

Accepted Answer

Injects a value from a property source or SpEL expression

Answer

@Value injects externalized configuration values or SpEL expressions directly into fields or method parameters.

Question 5

In Spring Security, what is the role of a UserDetailsService?

Accepted Answer

To load user-specific data during authentication

Answer

UserDetailsService is a core interface that Spring Security uses to retrieve a UserDetails object during authentication.

Spring Framework Practice Test