What is the purpose of rest API and where it should be used how can i know that in this part of website i should use rest API any one can tell me in simple words why,where and how can in implement that technology ?
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Many times when i apply for a job mostly asked me about rest API there are a lot of tutorials but i can't understand about that. That is clear that rest API work with systems internally and there response will be in Json OR XML format – user3902486 Oct 16 '14 at 10:10
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My answer might be not througout and lacking in precision, but it may do.
REST API means serving app (website) API through HTTP requests (mainly)
Thats simple/silly explanation.
Better one is here: What exactly is RESTful programming?
About when to use it... well.. that depends.
I guess common use case is when you want to expose some part of data/functionality of your site for third party developers. Then you may define URL under which you would return data in json or xml or....
