Microsoft Intern interview questions

I had dropped my resume in the University Career fair and they got back to me within a week or so to schedule an interview in my college. Onsite Interview (at my university): I had a 30 minute Onsite interview. It started off with why I was interested in MSFT. The interviewer then explained my the 3 different roles (SDE, SDET and PM) and I was asked which particular roles I was interested in. After that, I was given a simple question on Binary trees and I was asked to write a program. I had written a recursive code and was asked about the drawbacks of using recursive programs. And then I was asked to write test cases for my program. I guess what they were looking for primarily was 1. Interest in the company 2. If I can write good code and make sure there are no room for error 3. How broad are my test cases and the scenarios After around 2 weeks, I got a mail that I had cleared the first round and they were flying me to seattle for the next set of rounds. Interview in Seattle: There were around 15 of us and we were made to sit in one of the conference rooms with food. We were expected to have 4 rounds of interviews with different sets of employees and each interview would last for 45 minutes followed by a 15 minute break. By around 1, there were around 15 employees coming in and calling out a name and they would be interviewing us. The same happened for the next 4 rounds too. The questions were pretty straight forward and simple. The ones you'd find in the career cup books. After the 4 rounds of interviews, we were taken to the recreation room where we had Xboxs to play with and to keep our mind off the interview results. They called us one by one and gave the results the same day. And we were given around a week to accept the offer