Question 1

What do HTTP status codes mean?

Accepted Answer

HTTP status codes are 3-digit numbers returned by a server in response to a client request. The first digit indicates the category: 1xx (informational), 2xx (success), 3xx (redirection), 4xx (client error), 5xx (server error).

Question 2

What is the difference between 401 and 403?

Accepted Answer

401 Unauthorized means the request requires authentication — credentials are missing or invalid. 403 Forbidden means the server understood the request but refuses to authorize it — the client may be authenticated but lacks permission.

Question 3

Why do I get a 422 error?

Accepted Answer

422 Unprocessable Entity means the server understood the content type and syntax but couldn't process the instructions. Common causes: missing required fields, invalid field values, or business rule violations.

HTTP Status Codes

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