Biogen Principal Bio Statistician interview questions

Got the interview through a recruiter. I was informed of the interview the day before at 6pm, and the recruiter couldn't even tell for sure which position I was considered for. During the interview, talked to a current employee form the team. The whole interview was scheduled for 30 minutes and was mostly spent the employee asking technical questions- all expected. However the interviewing person got short at the call while I was trying to think through the technical questions. 30 minutes felt very short to start with, and the style of the interview did not provide a possibility for me to display what I had to offer for the position.