Hi Krishna,

See this a very personal choice to be honest. it totally depends how you feel your preparation is for the exam because there are even students who are unable to get a hang of it while they are taking coaching and some who might not need coaching at all. 5 years of Mtech doesn't guarantee you a good rank, what you have studied and the amount of effort you have put in matters. So just look at the previous year papers and you'll be able to evaluate yourself better.

Good Luck !!