Which HTTP method is idempotent and used to retrieve data?
GET requests a representation of a resource and should be safe and idempotent, causing no server-side changes.
2 / 5
What does HTTP status code 404 mean?
404 Not Found indicates the server could not find the requested resource. It is a 4xx client error.
3 / 5
Which status code class represents server errors?
5xx codes (like 500 and 503) signal the server failed to fulfill a valid request.
4 / 5
What is the role of the Content-Type header?
The Content-Type header tells the recipient the media type of the body, e.g. application/json or text/html.
5 / 5
What key feature did HTTP/2 introduce over HTTP/1.1?
HTTP/2 uses binary framing and multiplexing, allowing many concurrent requests over a single TCP connection without head-of-line blocking at the HTTP layer.