The Civil Services Aptitude Test (CSAT) is a critical component of the UPSC examination process, assessing candidates' general mental ability and comprehension skills. Conducted as part of the preliminary examination, this qualifying paper includes questions on logical reasoning, quantitative aptitude, and reading comprehension. It is designed to evaluate candidates' analytical capabilities and decision-making skills, essential for effective performance in civil services. While the CSAT is qualifying in nature, candidates must score a minimum threshold to be eligible for the Mains examination, reinforcing its importance in the broader selection process.