I passed on my resume to a director in firmware engineering at the career fair and I got a call back from him in a couple of days. Initially there was a phone interview in which he asked me a few questions about my projects and work experience and then a few technical questions. Then he scheduled for an onsite interview. There were 6 rounds - first three were with 2 Engineering Managers/directors for each round. They drilled a lot about my past work experience and projects (one should be thorough with each line in the resume). One round was technical assessment in C (standard C questions, code snippets and expected output, macros, pointers, arrays, structures, storage class specifiers). Next round was with a couple of technical people who catch you off guard with difficult questions and try to push you out of your comfort zone. Last round was with HR. They not only test your technical skills but also your over all personality. There were a lot of behavioral questions and they expect honest answers and a positive attitude.

One phone round with the hiring manager where he/she asked about my experience and courses in college. Phone screen was followed by in-person interviews. There were four interviews and a C assessment. Round1: Behavioral / resume round - managers Round 2: Technical - principal engineer Round 3: Behavioral - managers Round 4: Technical - senior engineers