Candidates can identify their strong and weak subjects for UPSC exams through self-assessment tests, regular practice with mock papers, and analyzing previous performance. Keeping a record of scores in different subjects allows them to pinpoint areas needing improvement. Peer discussions can also help gauge understanding, as different perspectives may highlight overlooked weaknesses. They should consider feedback from mentors during mock interviews as well. Self-reflection on comfort levels with specific topics will further aid candidates in strategically allocating study time to solidify their strengths and address weaker areas comprehensively.