Well, if you have studied properly during your B.Tech/B.E. then you don't need to prepare!!! Hehehe! But noone actually studies seriously during B.Tech/B.E.! Engineering is fun time! Passing exams during B.Tech/B.E involves mugging up the important stuff the night before paper and vomiting everything in the answer book! Back to our topic now, well if you have slight ideas of every subject, at least the overview i.e. what the subject is all about and some other basic fundas then you can prepare easily. Just collect all the standard books and previous year papers. Identify the topics which are source to questions in the previous papers and study the topics seriously and thoroughly, followed by practicing questions asked in papers from previous years. That was the way I prepared. As an added advantage, join a test series. To further add up, try to collect test series papers from other institutes from your friends if you can. The crux is that, study the topics and practice more and more and more ..... and more and even more and yet even more questions.
