RTX Firmware Engineer interview questions

Got asked to do an on-sight interview with panel of 5 firmware engineers after meeting a recruiter a week earlier. The interviewers didn't seem like they had prepared anything and simply asked questions off the top of their heads. Plenty of awkward silence while I waited for them to think of questions. They had me do 2-page worksheet with simple waveform/timing questions. Whole thing last a little over an hour. One guy just sat there the whole time looking down. Just seemed like a awkward group of guys in general. I think it was clear by the end of the interview that it was not going to work out, but they took me out to lunch afterwards anyway, which was regrettable.