Refer to the exhibit. How can a response status code be set for No Content (204)? (Choose the best answer.)

Question

Exhibit

Options

• AAnnotate the update() handler method with @PutMapping("/store/orders/{id"}",
• BAnnotate the update() handler method with @ResponseStatus(HttpStatus.NO_CONTENT).
• CAnnotate the update() handler method with @ResponseEntity(204).
• DThe update() handler method cannot return a void type, it must return a ResponseEntity type.

• A
  2% (1)
• B
  91% (53)
• C
  5% (3)
• D
  2% (1)

Explanation

@ResponseStatus(HttpStatus.NO_CONTENT) is the correct Spring MVC annotation for declaratively setting a handler method's response code - it tells the framework to return HTTP 204 when the method completes successfully, even when the return type is void.

Why the distractors are wrong:

• A is wrong because @PutMapping only maps the URL and HTTP method; it has no parameter for setting a response status code.
• C is wrong because @ResponseEntity(204) is not a valid annotation - ResponseEntity is a return type, not an annotation.
• D is wrong because void is perfectly valid when paired with @ResponseStatus; ResponseEntity is an alternative approach, not a requirement.

Memory tip: Think of @ResponseStatus as a sticky note you put on the method to label what status code it returns - whenever you need to override Spring's default 200 OK, reach for @ResponseStatus(HttpStatus.XXX).

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