The UPSC civil services selection process consists of several stages: the Preliminary Examination, the Mains Examination, and the Personality Test (interview). The Preliminary stage tests general studies and aptitude using objective questions, serving as a qualifying round. Successful candidates then partake in the Mains Examination, where they address subjective papers covering a range of subjects, including essays, and must demonstrate in-depth knowledge. Finally, those who pass the Mains proceed to the Personality Test, which assesses candidates' suitability for public service through interpersonal skills and temperament. This rigorous process ensures a comprehensive evaluation of aspirants.