Microsoft Software Developer I interview questions

I submitted my resume on the career fair in Sep and then got the recruiter contact me for on-campus interview at end of october. I was given a form to choose between three roles: developer, tester and program manager. I chose to interview as a developer. Asked about the basic data structure and algorithm questions. It has two coding questions. One is ask about how to reverse an array in place. The other is to find the number of repeated words in a string.

The interviewer was nice, gave some hints but I failed it due to a bad preparation.