The stages of the UPSC Civil Services Examination include the preliminary examination, the mains examination, and the interview. The preliminary exam consists of two objective-type papers that test general studies and aptitude. Candidates who qualify for the prelims then move on to the mains, comprising nine descriptive papers that evaluate their in-depth knowledge and analytical abilities. Finally, successful candidates from the mains are called for the personality test or interview, which assesses their suitability for a career in civil service, focusing on their communication skills, knowledge, and overall personality.