The Mains examination structure includes qualifying papers (Indian Language and English - 300 marks each) and merit papers: Essay (250), General Studies I-IV (250 each), Optional Subject Papers I & II (250 each), totaling 1750 marks for written test. Personality Test carries 275 marks. Grand total: 2025 marks. The examination assesses intellectual traits and understanding depth, with questions designed for well-educated individuals without specialized study requirements.