I had three different phone interviews, each with one or two engineers from the iPhone systems integration team. They asked several questions about basic circuit design, with no curveballs. Otherwise, they asked more open-ended questions, such as the future of interfacing with devices or the theory behind capacitive touch.
There was very little time to chat about other things, like personal projects, but when we did, it was usually technical. They're a sharp bunch of guys and great interviewers.
How else could you design a touch interface for a device (besides capacitive touch)?
The following metrics were computed from 42 interview experiences for the Apple Hardware Engineer role in Cupertino, California.
Apple's interview process for their Hardware Engineer roles in Cupertino, California is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Apple's Hardware Engineer interview process in Cupertino, California.