CodeNotary Software QA Engineer interview questions

Two stages (out of three, I assume) First stage: 15 minute call. Basic Linux questions (grep, du etc) 2nd stage: Coding/behavioural interview, 45 minutes. Asked to install their immudb database, and code some inputs to their db (I was lucky I had Python and other stuff install on my PC, otherwise it would have been a nightmare). I was also asked some math brainteaser, which I think is already listed here. I think the interview was fairly ad-hoc, it was more of a focus-on-a-skill-and-drill-down-into-it type of interview session. There was hardly any info about the company and the interview felt kinda all over the place. They didn't take me through to the next round, so not sure what to make of them.