Microsoft Software Development Engineer interview questions

On campus whiteboard coding interview. Interviewer mentioned he didn't have breakfast, and I was the last person before his lunch around noon. He somewhat appeared bored and annoyed throughout the process, just asking questions from a sheet and writing down some notes.

I started with an on campus interview which lasted for about 20 minutes. I was brought in for an on-site interview at their Fargo location. The interview lasted pretty much all day (about 8 hours) and consisted of 5 sessions plus lunch. The entire day was technical questions, with the exception of lunch, where they ask about where you see yourself and what you want to do with your life etc.