Applied online through linkedin. I received call from HR after about a month. Interview date was scheduled. Interview happened in a single day. There were four interviews. C, OS, DSP basics and interview with the team lead.

Applied through the university career fair. Got a call for phone interview two weeks after I applied. Phone interview was 50 minutes long with basic questions about embedded systems and real-time concepts. A couple of days of brush up should see you through this. On-site interview had 6 rounds including a lunch interview. Lots of questions on realtime time concepts were asked. Make sure you understand the complete memory layout. Assembly and pseudo codes​ were asked. Questions related to projects (I did) closely aligned with their work were drilled on.