Microsoft SE Intern interview questions

Got selected for an interview with Microsoft through a career fair in college. The interview was held in my college's campus and it lasted for 30 mins. It was A technical round. No behavioral questions asked. I was asked about my previous job experience only. No other behavioral questions asked. The interviewer was pretty cool and was helpful. While solving the problem, when I was stuck, the interviewer gave me certain hints and clues to get to the solution. It was more like a discussion.

I was contacted via email and invited to an on-campus interview that lasted 30 minutes long. I was given two programming questions, one related to graphs and the other related to a subarray sum problem. After a few days, I was contacted for second round interviews in Boston, all expenses paid, to be interviewed at the Microsoft Research Building. I had 4 45 minute interviews in the morning, and received an internship offer within a week.