The procedure for re-evaluation of answers in UPSC exams involves a formal application process. Candidates must submit a request along with a fee within a specified timeframe after result declaration. The application is then reviewed by the UPSC, but only if there's a clear indication of evaluation errors. Re-evaluation typically focuses on rechecking whether all answers have been scored correctly rather than a complete reassessment. Final decisions by UPSC on such requests are often binding.