Candidate were called from refferals. I received mail from HR three days before test. First round was aptitude test and consist of 50 questions 1 mark each. 25 technical and 25 aptitude. Technical were based all c/c++ and most of them were on pointers. Not dat much difficult, clear your concepts and you will be good to go. Aptitude was based on general topics like directions, time and work. But there is sectional cutt off so if you miss out one part your didn't get shortlisted thats what happened with me. Out of 150 people appeared 15 were shortlisted for aptitude.