Microsoft Software Engineer interview questions

First I got a phone interview and a month later 4 interviews on-site. All of them had the same structure. First, they asked me to describe what I did in a project and some behavioral questions. Then there was a coding problem involving data structures: stack, queues, linked lists and binary search trees.

They ask some question about behavior and then 15 minutes for technical question, you can solve it but if it is not the best way, you will not get offer.