UBS Quantitativer Analyst interview questions

I meet with all members of the team of four in two interview sessions. First round was all about open ended questions on how I would go on to solve some real life cases in trading strategy development. They test cased my experience regarding trading and finally they asked a programming question. Second interview was more high level with the manager and the last member of the group, again open ended questions on how I would tackle different scenario.

I'll be short, and try to only state facts. I was given an offer within a week of the first interview because they I knew I had another pending offer, and UBS successfully convinced me that their position is amazing. I turned the other one down, arrange my PhD defense date, purchased the literature and software they suggested me to practice with before the start. Kept getting positive emails from them. And then got a call that they no longer need me, right after my defense.