Spring Boot Building RESTful Services 5

Question 1

What is the purpose of Spring HATEOAS in RESTful service development?

Accepted Answer

Adding hypermedia links to REST responses so clients can discover actions dynamically

Answer

Spring HATEOAS provides tools to add hypermedia links (following the HATEOAS constraint of REST) to responses, enabling clients to navigate the API without hardcoded URLs.

Question 2

Which Spring Data REST annotation is used to prevent a repository method from being exported as a REST endpoint?

Accepted Answer

@RestResource(exported = false)

Answer

@RestResource(exported = false) on a repository method prevents Spring Data REST from automatically exposing that method as an HTTP endpoint.

Question 3

What does the produces attribute of @GetMapping do in a Spring REST controller?

Accepted Answer

Restricts the endpoint to requests where the client's Accept header matches the specified media type

Answer

The produces attribute narrows handler mapping so the method only handles requests whose Accept header is compatible with the specified media type(s).

Question 4

In a Spring Boot REST API, which property controls the base path for all Spring Data REST endpoints?

Accepted Answer

spring.data.rest.base-path

Answer

Setting spring.data.rest.base-path in application.properties changes the root URL under which all Spring Data REST endpoints are registered.

Question 5

Which annotation on a Spring REST endpoint method tells Jackson to exclude null fields from the JSON response?

Accepted Answer

@JsonInclude(JsonInclude.Include.NON_NULL) on the model class

Answer

@JsonInclude(JsonInclude.Include.NON_NULL) on the DTO or model class instructs Jackson to omit any fields with null values from the serialized JSON output.

Spring Boot Practice Test

Spring Boot Practice Test

Spring Boot Building RESTful Services 5