The system of evaluation for answer sheets in the UPSC examination employs a combination of objective and subjective assessment methods. For objective questions, evaluation is straightforward, focusing on correct answers. For subjective answers, experienced examiners use standardized marking schemes to assess clarity, coherence, relevance, and depth of knowledge. Additionally, answers are often evaluated anonymously, ensuring impartial judgement. This rigorous evaluation system aims to maintain high standards and fairness in selecting candidates for civil services.