Emerald Labs interview questions

I received an Invitation for interview via email. I arrived the office 5 minutes before the scheduled time, the interviewer was a bit late but it's okay. He asked me a few questions and even was expecting my hands on experience on a new Android Library that was released 3 weeks ago and some other such questions that were not supposed to. Might be that was the part of their interview process or some other reasons. Overall my experience was not good enough.