Well the IAS exam is conducted by the UPSC

The basics eligibility for the IAS exam is that you must have done the bgraduation in any field

Applicants who have appeared or intend to appear for the final examination and are awaiting results are also eligible to apply for the Preliminary Examination.

You must have attained the age of 21 years and must not have attained the age of 32 years

Nationality:

For the Indian Administrative Service and the Indian Police Service, a candidate must be a citizen of India.
For other services, a candidate must be either :—

A citizen of India, or

A subject of Nepal, or

A subject of Bhutan, or

A Tibetan refugee who came over to India before 1st January, 1962 with the intention of
permanently settling in India

IAS Exam Pattern

Serial Number Name of Paper Marks Allotted

Paper 1: General Ability Test (GAT) 200 Marks

Paper 2: English Language and Aptitude 200 Marks

Total 400 Marks