HTTP Status code

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http status codes :

4**  :  Client error : This group of HTTP status codes include those where the request for a web page or other resource contains bad syntax or cannot be filled for some other reason, presumable by fault of the client

5** :  Server error: This group of HTTP status codes include those where the request for a web page or other resource is understood by the website's server but is incapable of filling it for some reason.

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