The HR person was very friendly. She was straight forward with her questions and information. They have 30-minute slots for interviews, so it is understanding that she didn't want to "chat". It was basically a screening to ensure that you are who you say you are. Talk about your experience, your interest, your goals, etc.

I interviewed back in the Fall of my senior year of college (2020) and there were two rounds of interviews. The interview itself was fairly casual and the recruiter(s) made me feel super comfortable. Remote school, work, etc. was still the norm at the time, so my interview was via Zoom. The questions weren't necessarily easy, but they weren't too difficult either; they were good questions that got me thinking and maybe even helped to improve my interview skills after the fact. They ended up going with a different candidate, but I (oddly) enjoyed the interview process and found it to be a good experience for myself at that age.