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Though, the exam is popularly known as IAS exam, but officially it is called the Civil Services Exam (CSE), which is conducted every year by Union Public Service Commission (UPSC). The UPSC CSE consists of 3 stages:
Preliminary Exam
Mains Exam
Personality Test/Interview.
Full detail of UPSC CSE: Click here
UPSE CSE 2017 notification updated. Click Here