It went pretty smoothly and on time. Very difficult because the depth of details required to work there. If you say that you know a skill really well, you'd better really know that skill—be as honest as possible. If you know at least one programming language REALLY well enough to admin or automate a series of systems, then the interview should go smoothly for you. Later on you must know Data Structures and algorithmic theories and how to apply it in programming. Know linux like the back of you hand—practice BSD. Lastly, don't get discouraged if you don't get in on the first try. I asked my interviewer how many times it took him and he said at least 2 and some other's 3 or more tries. It's all about how bad you want in. Take any failure as a learning lesson and apply again in the next 6months (their wait time) and try again. Good luck!

HR round after applying, then coding screening round, if passes, then final round which consists of four coding round or three coding and one design round. Problem difficulty medium to hard.