The three main stages of the UPSC Civil Services Examination are the Preliminary Examination, the Main Examination, and the Interview. Each stage tests different skills and knowledge areas essential for a successful career in public service. The Preliminary Examination is objective, serving as a screening test, whereas the Main Examination consists of descriptive papers that assess candidates’ depth of knowledge and analytical capabilities. Finally, the Interview evaluates the candidates' personality, communication skills, and suitability for civil service roles, bringing a holistic approach to the selection process.