Question 1

What are the categories of HTTP status codes?

Accepted Answer

Five categories: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), 5xx (Server Error). Common ones: 200 OK, 301 Moved Permanently, 404 Not Found, 500 Internal Server Error.

Question 2

What's the difference between 301 and 302?

Accepted Answer

301 is permanent redirect — search engines transfer ranking to the new URL. 302 is temporary — search engines keep indexing the original URL. Use 301 for SEO migrations.

Question 3

What's the difference between 404 and 410?

Accepted Answer

404 means resource not found (possibly temporary). 410 means resource is permanently gone. Search engines remove 410 pages from the index faster.

🌐 HTTP Status Codes