I applied through a referral. It took only 4 days to complete my all interview rounds. There are total 3 rounds for the post I applied for. 1st one is general conversation that is to check my communication if I can continue or not. After that I got selected for the 2nd round which is apptitude test. As I wasn't in the same city. The HR mailed me the link. That test consist of 4 modules and every module was easy to solve and answer it includes basic maths and English. After you score well cut was 50% at the time. The final interview was conducted by the senior manager. It was a Skype interview and was of 25 minutes. You just have to make them believe that you will join the company and will do the work.