Microsoft Software Engineer interview questions

I was invited to an on-campus 30 minute interview. I was asked to write an algorithm to solve a problem (don't remember anymore) using pen and paper. Afterwords, I was given an opportunity to ask any questions I had. About a week later, I was sent an email that I had passed the first interview rounds, and was invited to the final rounds BUT that however, they had no interview opportunities currently available. ??? that was that.

I attended the university recruiting event and after about a couple of weeks, I received an interview offer at campus. I sat down with a recruiter 1:1 and answered resume and technical questions. I didn't like that he didn't pay attention to me while I was talking.