Understanding 2xx HTTP Response Codes for REST APIs

D.

HTTP response codes are status codes that indicate the outcome of a request made by a client to a server over the HTTP protocol. REST APIs use HTTP response codes to communicate the status of the requested operation to the client.

The 2xx HTTP response codes indicate successful requests. Specifically, the response codes in the 200-299 range indicate that the request was successful, and the server was able to fulfill the client's request as expected.

Option D, "successful acceptance of the client's request," is therefore the correct answer. The client can expect that the requested operation has been completed, and the server has provided the expected result.

Examples of 2xx HTTP response codes include:

• 200 OK: The request was successful, and the server has returned the requested data.
• 201 Created: The server has successfully created a new resource based on the client's request.
• 204 No Content: The server has successfully fulfilled the request, but there is no content to send back.

It's worth noting that even though a 2xx response code indicates success, the server may still include additional information in the response payload. For example, a response payload may include metadata or additional information about the resource returned by the server.

In contrast, response codes in the 4xx and 5xx range indicate errors or failures, and typically require some action from the client or the server to resolve the issue.