HTTP response status codes indicate whether a specific http request has been successfully completed.
Responses are grouped in five classes:
Common HTTP status code:-
1xxs – Informational : Information response indicates that everything is ok
2xxs – Success : Server successfully received the request and successfully processed the request
3xxs – Redirection: Redirectional response status indicates that a further action is necessary to complete the request.
4xxs – Client errors : Client error, indicating possibly incorrect syntax, or a different user error that prevents fulfilling the request.
5xxs – Server error : Server error that presented what seems to be a valid request from being fulfilled.