Answer 1: REST is an architectural style for creating web services and it defines a set of constraints.

Answer 2: The easiest way to create RESTful web service with Spring Boot is to use Spring Data REST starter package. By default, the Spring Data REST finds all public repositories and creates automatically RESTful Web Services for your entities.

Answer 3: By sending a GET request to the endpoint of the entity. For example, if you have entity class called Car the Spring Data REST creates the endpoint called /cars that can be used to fetch all cars.

Answer 4: By sending a DELETE request to the endpoint of the individual entity item. For example, /cars/1 deletes an car with id 1.

Answer 5: By sending a POST request to the endpoint of the entity. The header must contain the Content-Type field with the value application/json and the new item will be embedded in the request body.

Answer 6: By sending a PATCH request to the endpoint of the entity. The header must contain the Content-Type field with the value application/json and the updated item will be embedded in the request body.

Answer 7: You have to annotate your repository using the @RepositoryRestResource annotation. The query parameters  are annotated using the @Param annotation.