Well the interview process consists of 5 eliminating rounds. Round 1 is a written IQ test, duration is 30 mins and is pretty general. Thereafter Round 2 is HR round, that is highly unforeseen and leads to majority of eliminations, in my case close to 22 people were eliminated with only 3 making to the next round. Round 3 again is a written test of duration 90 mins. Again quite generic nothing specific. All these round take place on a single day. Thereafter you will be called if you are shortlisted for Round 4 which is basically a personal interview, wherein two people of manager rank will sore down your neck. And finally if go get further shortlisted there is the final Round 5 that is called the director's round which is the last hurdle before you are made an offer. But be aware that many a times they simply land up hiring no one, hence its not certain that someone will get hired out of all that appear.