The role of the Civil Services Aptitude Test (CSAT) in the UPSC exam is to evaluate candidates' basic proficiency in comprehension, logical reasoning, and analytical abilities. It serves as a qualifying paper, consisting of multiple-choice questions designed to assess these essential skills which are vital for a successful career in civil services. Candidates need to score a minimum percentage to qualify for the Mains examination. The CSAT ensures that those advancing to the next stage possess the necessary skills to tackle the extensive challenges of administrative roles.