8 tips to crack UPSC prelims in first attempt 8 tips to crack UPSC prelims in first attempt UPSC Civil Services Prelims 2021: The preliminary exam demands a different approach due to sheer competition faced by aspirants from lakhs of aspirants. advertisement 8 tips to crack UPSC prelims in first attempt The Union Public Service Commission, UPSC Civil Services exam has three basic stages. The first stage is Prelims which is objective in nature, the second stage is Mains which is a written examination and the third stage is the interview which is a verbal evaluation process. Out of these, the prelims stage is unique in nature. where every aspirant irrespective of his level of preparation appears for this stage and aspirants who fail in any of the subsequent stages, start from here only. Hence, the preliminary exam demands a different approach due to sheer competition faced by aspirants from lakhs of aspirants. Failure in this stage can jeopardise the entire preparation strategy.