Free AWS Certified Developer Associate DVA-C02 Practice Question

The correct answer is 401 Unauthorized. This status code indicates that the request has not been applied because it lacks valid authentication credentials for the target resource. The other codes listed are incorrect because 404 implies that a resource is not found, 400 indicates a bad request from the client that the server could not process, and 500 signifies an internal server error, none of which are appropriate responses for an authentication issue.