Crestron Electronics Software Engineer(Internship) interview questions

This was a behavioral interview during covid. Had a very strange experience. I entered the meeting, and when I greeted, someone who sounded like they didn't want to be there said "turn your camera on." None of the interviewers turned on their camera for the duration of the interview. They went through my resume, and when they asked about some concepts I didn't know at the time (networking, dev-ops), the main interviewer was rather condescending and asked "you don't know anything about these?" with the anything emphasized. Very strange experience.