The UPSC Civil Services Mains Examination consists of nine papers, including compulsory papers like Indian Language and English, alongside essays and various optional subject papers. Each paper typically carries 250 marks, while the essay paper holds 250 marks as well. The examination spans 3 days, with comprehensive questions aiming to assess candidates' analytical abilities, knowledge integration, and critical thinking. Each candidate faces a total score of 1750 marks, with additional marks allotted for personality tests in the subsequent interview phase. The rigorous structure tests aspirants on their understanding of diverse topics in a unique manner.