Microsoft Intern interview questions

From the time I gave my resume to when I got my offer, it took about 2 months. 1) Microsoft was at my school lobby and I dropped off my resume. 2) About 3-4 weeks later I was invited to a 30-min interview on my University's campus. The interview was easy. First part was to describe a hard project or bug I worked on, and the second part was to code on the white board. Coding question was: Given a string and two chars, find the minimum distance between those two characters in the string. 3) Since I had another offer which had a near deadline, Microsoft got back to me quickly within a week. I was invited to their Redmond campus for 3 45-min interviews. I did badly in the first question and didn't get to finish my code, did great on the second, and average on the third. The entire interview process went smoothly and traveling to Redmond was great since everything was paid for and organized really well. I got my interview results in an email when I got back to my hotel after the interview day.