What response status codes do you know and can you give examples?

The main HTTP response status codes are divided into groups:

• 1xx — informational (e.g., 100 Continue)
• 2xx — successful (e.g., 200 OK, 201 Created)
• 3xx — redirection (e.g., 301 Moved Permanently, 302 Found)
• 4xx — client errors (e.g., 400 Bad Request, 401 Unauthorized, 404 Not Found)
• 5xx — server errors (e.g., 500 Internal Server Error, 503 Service Unavailable)

Examples:

• 200 OK — the request was successfully processed, and the server returned data.
• 404 Not Found — the requested resource was not found.
• 500 Internal Server Error — an unexpected error occurred on the server.

Knowing these codes is important for API testing and understanding web application behavior.