Microsoft Intern interview questions

I was contacted for an on-campus interview by email. It was my first technical interview, so I was not as well prepared as I could have been, but frankly I expected more out of the interviewer. The interviewer was late for the scheduled slot and made me reschedule to a slot later in the day. At the end of the interview, the interviewer bluntly let me know that I was ill-prepared for the interview and lacking in technical knowledge, which I slightly disagree with considering I'm currently employed and have gotten many interviews since the first.

Process took over two months. After submitting CV and cover letter, I was invited to do paper test. There were 5 programming (binary search, trees, matrices, etc.) and 2 math questions (probability and calculus). Among more than 100 students, 10 were selected to do face to face interview.