To begin with, the first round is a hardcore technical round. It went on for about 90 mins. They asked in and out of an Embedded system. This includes Software Architecture if applying for a Software position or Circuit design if applying for Hardware position. After this the second round was general technical questions. It went on for about 30 mins. Final round was the HR interview that was for about 15 mins. Mind you, you qualify for a round only if you have cleared the previous round. Also there are high chances that you may do well in technical rounds and still be failed in the HR-round. So be cautious.