Apple Firmware Engineer interview questions

I had applied a number of times online. I didn't get any response from anyone in HR until I had an employee referral. The process moved very quickly. From the time I got my first email from HR to the time I was on-site doing an in-person interview was 7 days. There was some emails exchanged with HR then two phone interviews. The first phone interview was with the hiring manager. This was a pleasant conversation that lasted about 30 minutes. Some very high-level technical questions were asked but nothing too serious. The second phone interview was two days later with 3 people from his team. They sent me a link to a website that would allow me to write code and they could watch in real time. This was used as they asked me technical questions for about 45 minutes. I was then asked to fly out to Cupertino for an on-site interview. Interviews were scheduled from 10am to 5pm straight, where there was 1.5 hour block startin at 11:30 for lunch. Most of my interview sessions were either 30 minutes or 45 minutes. The first session was with two engineers and they started throwing all sorts of coding and technical level questions at me. I then had a one-on-one session with the hiring manager then a few more sessions. Finally, when the lunch session came, two engineers came and got me and brought me to get the cafeteria. We took our food to go and went into a conference room where they continued to interview me. I didn't really get to eat since I was busy talking. When they were done, the HR person came in and told me that my skill set didn't match what they were looking for and I was free to go. I was scheduled to interview until 5pm and it was only 1pm. Needless to say, my ego was a little bruised.

One phone interview followed by Onsite.