Answer Key: UPSC IAS Prelims 2017 CSAT Paper-II th The UPSC civil services prelims exam was held on 18 June, 2017. CSAT was conducted in the afternoon session. The paper had as expected 80 questions to be completed within 2 hours. Each wrong answer carried a penalty of 1/3rd of the marks allotted to that question. In this article, we bring you the answer key for the 2017 CSAT paper. Also See | Answer key of UPSC 2017 GS Paper ...