To become IAS officer you have to qualify UPSC civil service exam also known as IAS exam or civil services exam. Every yr it is conducted by union public service commission . And you know the role is to serve central and state governments.
Exam in three phrases:
Preliminary, civil services, personality test.
Educational qualification is graduation. And UPSE age limit is minimu of 21 not more than 32.
And the top ias coaching institutes are:
Brilliant Tutorials Private. Limited.
Rau's IAS Study Circle.
Sathya IAS Academy.
Khan Study Circle, delhi.