The first stage was a phone interview with a 10 minute powerpoint on an engineering related topic (college projects, internships, etc.). The next step was an all day onsite interview with a ton of circuit analysis (mainly op amp circuits not taught in the classroom, but can be solved without too much trouble if you know the basics of op amps). A few basic c programming questions to check if you have ever done any programming... A few questions on how you would approach a problem (broken pcb, inoperative circuit, etc.). The onsite interview included a panel interview with a few members of the team as well. There were a few behavioral questions sprinkled in as well.

The HR interview was easy, asked me more about my academic projects and experiences. Questions are more situational like they ask you about how you handle things and stuffs like that.