Hey,

You can get the mock as well as previous year examination papers of UPSC over its official website.

Click on the link below to get to the previous yera examination papers of UPSC:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.upsc.gov.in/examinations/previous-question-papers&ved=2ahUKEwic9eOTtO_rAhVJ73MBHV0QBdQQFjAAegQICxAC&usg=AOvVaw2HUl_rPgAnRcY2k7OkYTHW