Springboot

Question 1

What are annotations used for in Springboot?

Answer 1

Annotations in Spring Boot are used to provide metadata for the Java code, enabling a simpler and more readable configuration compared to XML-based configurations. They play a crucial role in the framework, driving various functionalities and configurations.

Question 2

What does the @Autowired annotation do?

Answer 2

It is used for dependency injection, allowing Spring to resolve and inject collaborating beans into your bean.

Question 3

What annotations are used for dependency injection?

Answer 3

@Autowired, @Qualifier, and @Bean

Question 4

What annotations are used for Component Scanning?

Answer 4

@Component, @Service, @Repository, and @Controller are used to automatically detect and register beans in the Spring container from the classpath scanning.

Question 5

What annotations are used for configuration?

Answer 5

Configuration: @Configuration is used in classes that define beans. @PropertySource is used to declare a set of properties (defined in a file) in a Spring environment.

Question 6

What annotations are used for web development?

Answer 6

Web Development: Annotations like @RequestMapping (and its variant annotations like @GetMapping, @PostMapping, etc.), @ResponseBody, @RestController, and @PathVariable are heavily used in Spring MVC for handling web requests.

Question 7

What annotations are used for Aspect, Oriented (AOP) Programming

Answer 7

Aspect-Oriented Programming (AOP): @Aspect, @Before, @After, @Around, etc., are used for aspect-oriented programming which allows implementing cross-cutting concerns.

1. @Aspect
2. @Before
3. @After
4. @Around

Question 8

What annotations are used for transitional management?

Answer 8

Transaction Management: @Transactional is used for declarative transaction management.

Question 9

What annotations are Springboot specific?

Answer 9

Spring Boot-Specific Features: Annotations like @SpringBootApplication, @EnableAutoConfiguration, and @SpringBootConfiguration are specific to Spring Boot and help with auto-configuration, component scanning, and configuration setup.

1. @SpringBootApplication
2. @EnableAutoConfiguration
3. @SpringBootConfiguration

Question 10

What annotations are used in testing?

Answer 10

Testing: @SpringBootTest, @DataJpaTest, @WebMvcTest, etc., are used to simplify the setup and configuration of tests.

Question 11

What annotations are used in security?

Answer 11

Security: Annotations like @PreAuthorize, @PostAuthorize, @Secured, etc., are used for method-level security.

Question 12

What invitations are used in data access?

Answer 12

Data Access: @Entity, @Table, @Id, etc., are used in Spring Data JPA for ORM (Object-Relational Mapping) and database operations.

Question 13

What annotations are used in validation?

Answer 13

Validation: Annotations such as @Valid, @NotNull, @Size, etc., are used for validating Java beans.

Question 14

What annotations are used in caching?

Answer 14

Caching: @EnableCaching, @Cacheable, @CacheEvict, etc., are used for caching abstractions.

Question 15

What annotations are used in scheduled tasks?

Answer 15

Scheduled Tasks: @Scheduled is used to define methods that should run at a fixed interval or cron expression.

Question 16

What annotations are used in event handling?

Answer 16

Event Handling: Annotations like @EventListener are used to mark methods as event listeners.