Got a call from a recruiter for basic phone screening followed by call interview with Sr. Manager. He asked me some basic questions like Arrays over Linked Lists and advantages of Binary trees, basic OS questions like process scheduling and priority inversion and some other non-technical stuff. A week and a half later had an onsite interview with Senior Managers and Directors. Very nice people. Pretty laid back. They just want to know you and expect honest answers. 2 rounds technical followed by lunch followed by 2 behavioural rounds with the directors and senior managers. All technical stuff was from basic OS, debugging and comp arch. The last thing was a C test. Relatively simple for anyone straight out of college. The test contained questions on ISR, storage classes, function pointers, arrays, structs and unions, preprocessor directives and basic bit manipulation. Overall I think technical forms only about 1/4 of their selection process!