U5. Spring

What HTTP status code is returned when a POST request successfully creates a resource?

• 200 OK

• 201 Created

• 204 No Content

• 400 Bad Request

In Spring Boot, what annotation is used to mark a class as a REST controller?

• @Controller

• @RestController

• @Service

• @RequestMapping

What is the main advantage of using the DAO (Data Access Object) pattern?

• It speeds up SQL query execution

• It hides data access complexity and facilitates unit testing

• It allows direct database access from the controller

• It eliminates the need for an ORM like Hibernate

Which of the following methods is used in Spring Boot to handle HTTP POST requests?

• @PostHandler

• @PostMapping

• @PostRequest

• @HttpPost

What is the purpose of the @PathVariable annotation in a Spring Boot controller?

• It binds a method parameter to a value in the URL path

• It injects dependencies into a method

• It validates the HTTP request body

• It specifies the default HTTP method for a controller

Which annotation is used to inject dependencies automatically in Spring?

• @Inject

• @Dependency

• @Autowired

• @ComponentScan

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

• Prevents a field from being converted to JSON when serializing an object

• Forces a field to always be included in JSON responses

• Ignores errors in JSON requests

• Converts Java objects to XML

Fill in the blank: The method findById(int id) in Spring Boot returns an object of type _______.

• Empleados

• Optional<Empleados>

• List<Empleados>

• ResponseEntity<Empleados>

What annotation is used in Spring Boot to define a method that handles DELETE requests?

• @DeleteRequest

• @DeleteHandler

• @DeleteMapping

• @RemoveMapping

What HTTP status code should a DELETE request return if the operation is successful?

• 200 OK

• 201 Created

• 204 No Content

• 404 Not Found