Some open questions, but nothing you wouldn't expect to be asked in an interview of this type. The technical questions were challenging, but easily doable for a graduate. It's the type of interview you can really get into a passionate conversation about something you do/have worked on.
I applied through a recruiter. The process took 2 weeks. I interviewed at Zethon (Aston Clinton, England) in Sep 2023
Interview
90 minute interview with questions regarding university projects as well as some short technical questions related to mathematics, software digital electronics and analogue electronics. The mathematics questions were very simple.
Interview questions [1]
Question 1
What were some of the projects you completed at university?