I started out talking to the hiring manager for the position and ended with talking to HR. The whole process took about 90 minutes, with a little over a half hour for both of them and a break in between.

Hiring manager:

Q: What is the difficulty with scaling down transistors to the levels we do? Q: What are the benefits of increasing the number of transistors?

HR:

Q: What do you know about the company? Q: What was a time you worked in a leadership role and had to resolve an issue with someone on the team? Q: Have you ever had difficulty meeting a deadline? Q: How do you manage work/life balance?