First there was a qualifying round on hackerearth. It had 3 programming questions and some MCQs about data structures, operating systems and networking. The programming questions were really good with tight constraints. After that there were 2 rounds of interviews on skype. The first round focused on data structures and algorithms, technologies and computer science fundamentals. I was asked to code my solution for the algorithm questions. After clearing this round, I got a call for the second round. The second round focused heavily on the knowledge of operating systems, networking and database. It was really a difficult one.