Keep in mind this was only a first round interview for an off-cycle position, and I was not super prepared at this time (a couple years ago). However, I found the interview very strange, as I got an email at 10am, asking for a phone call at noon. Interviewer was super inpersonal, hardly asked any resume, education, or experience related questions, then jumped right into some basic technicals. the whole thing was only 15-20 minutes, and while most of the technicals were easy, a couple more difficult ones tripped me up.