AWS Certified Developer Associate DVA-C02 Practice Question

The HTTP 400 Bad Request status code indicates that the server could not understand the request due to invalid syntax. When an API Gateway receives a request with a well-formed payload that does not meet the criteria or expected values, it responds with this error code. It suggests that the client should not repeat this request without modification. The 200 OK status code indicates that the request has succeeded, which is not appropriate in this context. A 500 Internal Server Error suggests a server-side issue, which would not be the correct response for a client error in formatting. Finally, 502 Bad Gateway implies that the server, while acting as a gateway or proxy, received an invalid response from the upstream server, which does not fit the scenario described.