I have applied via college campus placement. There are three rounds. Aptitude round Communication round Hr interview Every round was elimination round.so be careful and prepared well for it. Aptitude sections consists of quantitative aptitude logical thinking and reasoning questions. Prepare with RS Agarwal apititude book,it will be very useful .

It had 3 rounds and its a off campus drive. Written test - which contains verbal, numeric questions, Technical round and HR round. Interview was happen some time in 2011. After the selection I got offer letter in a month period and I got call letter after finishing my B.Tech. Close to one year after they called me for the work.