Uber Software Engineer interview questions

Two rounds about previous projects, one round talk to HM, one round talk to bar raiser which is more like behavior questions, one round coding. I explained the projects again and again to different interviewers. Maybe they evaluate them in different aspects.

The introduction and behave questions are fine. Interviewer asked something about my resume and high level technical stuff happening in the company. Technical part is not easy, I was given a medium level question but didn't solve it.