Time constraints significantly impact performance in UPSC exams by creating pressure during both writing and decision-making processes. Limited time can lead to hurried answers, decreasing clarity and coherence. Candidates must practice effective time management during preparation to overcome this challenge. Familiarity with the exam format and frequent practice through mock tests can enhance speed and improve accuracy. Additionally, developing strategies to prioritize questions based on confidence levels can enable candidates to optimize their time usage, ensuring a better overall execution during the exam.