@PutMapping and @DeleteMapping in Spring Boot - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the @PutMapping annotation in Spring Boot?

The @PutMapping annotation maps HTTP PUT requests to a specific method in a controller. It is used to update existing resources on the server.

beginner

What does the @DeleteMapping annotation do in a Spring Boot controller?

The @DeleteMapping annotation maps HTTP DELETE requests to a method. It is used to delete resources from the server.

intermediate

How do @PutMapping and @DeleteMapping differ from @GetMapping and @PostMapping?

@PutMapping and @DeleteMapping handle updating and deleting resources, respectively, while @GetMapping retrieves data and @PostMapping creates new resources.

intermediate

Show a simple example of a method using @PutMapping to update a user by ID.

Example:

@PutMapping("/users/{id}")
public ResponseEntity<User> updateUser(@PathVariable Long id, @RequestBody User user) {
  // update logic here
  User updatedUser = userService.updateUser(id, user);
  return ResponseEntity.ok(updatedUser);
}

intermediate

Why is it important to use @DeleteMapping for delete operations instead of @GetMapping?

Using @DeleteMapping clearly signals the intent to delete a resource and follows HTTP standards. @GetMapping is meant for safe, read-only operations and should not change server state.

Which HTTP method does @PutMapping handle?

A GET

B POST

C DELETE

D PUT

@PutMapping maps HTTP PUT requests, which are used to update resources.

What is the main use of @DeleteMapping in Spring Boot?

A To create new resources

B To delete resources

C To retrieve resources

D To update existing resources

@DeleteMapping is used to handle HTTP DELETE requests to remove resources.

Which annotation would you use to update a resource at the URL '/items/{id}'?

A @PutMapping("/items/{id}")

B @PostMapping("/items/{id}")

C @GetMapping("/items/{id}")

D @DeleteMapping("/items/{id}")

@PutMapping is the correct annotation for updating resources at a specific URL.

Which HTTP method should NOT be used to delete a resource?

A DELETE

B PUT

C GET

D POST

GET requests are meant for reading data and should not change server state like deleting resources.

In a Spring Boot controller, which annotation is best for a method that removes a user by ID?

A @DeleteMapping

B @PutMapping

C @PostMapping

D @GetMapping

@DeleteMapping is designed for delete operations, making it the best choice.

Explain how @PutMapping and @DeleteMapping are used in a Spring Boot REST controller.

Think about how HTTP methods relate to resource actions.

Describe why it is important to use the correct HTTP method annotations like @PutMapping and @DeleteMapping in REST APIs.

Consider how clients and servers understand requests.