The UPSC examination process comprises three stages: the Preliminary Examination, the Mains Examination, and the Interview. The Preliminary stage is a screening test with objective questions designed to assess general studies and aptitude. Those qualifying move on to the Mains, which includes descriptive answers across various subjects, testing in-depth knowledge. The final stage, the Interview, focuses on evaluating candidates' personality traits, communication skills, and overall suitability for a civil service position. Each stage serves a distinct purpose, aiming to identify candidates who can effectively serve the nation.