Microsoft Software Development Engineer interview questions

I applied via the company website, and was promptly given a time for a phone interview. They were very flexible with the interview times and I gave them several times to choose from for the interview. The phone interview process went well, though the interviewers often seemed distant and un-engaged, as you can hear them type out your answer in the background.

Had a on-campus interview first. Then, went to on site interview. There were 4 interviewers in total. Everything was fine until I met the 3rd interviewer. He threw out the question at me and I thought about an approach first. BUT, he started yawning and picking his ear which gave me so much pressure and eventually I ended up screwing up the interview.