First HR contacted me, then there is the first phone interview asking project experience and background, with a simple string swapping question, explain virtual memory, later it's the second interview, asking project experience and background again, explain virtual memory again, simple lnked list add/remove question, then on-site interview, 6 interviewer, 45 minutes each, I explained my project experience 6 times, with algorithm, data structure, virtual memory, CPU cache, debugging questions.