Last Updated: IAS Eligibility Criteria 2021: Exam Pattern, Age And Other Qualification Details Of Exam For all the candidates who are curious to know about the IAS exam 2021, here is a look at the UPSC eligibility criteria 2021 and other details of the exam. Image: Shutterstock The Indian Administrative Service, IAS is the administrative arm of the All India Civil Services. It is one of the three arms of the All India Services along with the Indian Police Service and the Indian Forest Service. Members of these three services serve the government of India and also the individual states. Union Public Service Commission will be conducting the preliminary UPSC 2021 Civil Services examination on June 27, 2021, and the main exam will be held on September 17, 2021. A lot of candidates have been curious to know about the IAS eligibility criteria 2021, IAS exam pattern and IAS syllabus for the IAS exam 2021. Here is a look at the details about the IAS exam 2021.