Well, its a normal process. You must have 60+ in 10th/12th and BE/B.Tech till then. Read Barrons 12-14th editions. Most of the questions will match exactly. Interviews can be very tough depending on the panelist. CSE & IT students should brush up their knowledge to the core. Rest all streams, prepare in one or two favorite and core subjects. Give positive answers always. Do not show attitude or even if you know more than what they have asked, this will lead to disaster.