Practice papers build confidence before the UPSC exam by familiarizing candidates with the exam format and question patterns. Regularly attempting mock tests allows aspirants to assess their preparation levels and areas needing improvement. Time management during practice builds speed and accuracy, integral for the exam setting. Analyzing performance post-tests helps identify strengths and weaknesses, facilitating targeted revisions. This iterative process of practicing under exam conditions reduces anxiety, building the necessary self-assurance that candidates need to approach the actual exam with composure.