Quote from ChaosNSX:
Don't feel bad..
Microsoft interviews are ridiculous.. years ago I interviewed for a corporate finance internship on the main campus. The questions they asked were just ludicrous.
I kept saying this has no relevance to the internship and has nothing to do with finance. I told him he was wasting both our times by not asking me relevant questions, and furthermore making me go through this hoop jumping before I got to ask a question that would make or break it for me. I like a riddle as much as the next guy, but he was a nut. He was even impressed and said the exercises existed to have people think for themselves and outside the box. His favorite was if you were in the room with the queen of england what kind of cake would you serve her. My answer was a magical cake that would tell me whether or not the internship paid more than 20K for the duration. After he answered the interview was magically over.
Don't feel bad, get the facts and find out if its even the "opportunity" you want to begin with as soon as possible...