Moody's Rating Associate interview questions

First round was a phone screen with a VP, approx 20 min, mainly asked about my past experiences. Then 3 days later I was invited to the superday. The superday contains 2 rounds, 30 min each. The first round was with an AVP and the second round was with an AVP and a MD. The interview questions were mainly behavioral questions and few technical questions asking about fixed income and securities. The interviewers were super nice. Received offer call 5 days after the superday.

I've never had just an unprofessional interview in my life lol, joined call I barely gave myself an introduction and the dude was like okay answer these technical questions. I was caught offguard, Both their faces the entire time were straight and stern, like i get it but cmon