Got referral from one of my friends in the company and he communicated with me the date of aptitude. I had total of 4 rounds of interview. It maybe 5 depending on the team and position. Aptitude is simple. 50 basic questions but to be answered within 20 minutes. No negative marks. Had my other interviews the next week. But be sure to call the HR and remind them that you have cleared the aptitude otherwise they forget(Happened in my case... I didn't get the HR contact for few days and when I told her I had cleared apti she immediately setup date for other interviews). The technical interview was ok. Some questions on data structures, SQL and programming and some puzzles. Managerial interview was good. Some basic programming questions and SQL again and more hr type questions. HR round was just formality. Got offer letter after 2 weeks. They ask for 3 month's pay slip if you are changing companies but you decide whether you want to divulge that or not

Before going final interview have to clear two rounds. first round is Aptitude, Reasoning and verbal second round is Coding round. It was around three questions . after clearing those two rounds only proceed for the third round.