Question 1

What are HTTP status codes?

Accepted Answer

HTTP status codes are standardized three-digit response codes that indicate the result of a client's request to a server. They are grouped into five classes: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error).

Question 2

What does HTTP 404 mean?

Accepted Answer

HTTP 404 Not Found indicates that the requested resource could not be found on the server. This commonly occurs when a URL is typed incorrectly, a page has been deleted, or a link is broken.

Question 3

What is the difference between 401 and 403?

Accepted Answer

401 Unauthorized means authentication is required and has failed or not been provided. 403 Forbidden means the server understood the request but refuses to authorize it - the user may be authenticated but lacks permission for the resource.

Question 4

What causes a 500 Internal Server Error?

Accepted Answer

A 500 Internal Server Error indicates the server encountered an unexpected condition that prevented it from fulfilling the request. Common causes include unhandled exceptions, database connection failures, configuration errors, or bugs in server-side code.