Uber New Grad Software Engineer interview questions

I first got contacted by a recruiter and did a technical phone screen. After passing the technical phone screen, I was then invited to an onsite batch interview day 3 weeks later.

They reached out to me to do on campus interviews. 45 min, 1:1. The interviewer was a bit tired and unengaged. He asked me to code my solution to the LRU cache problem on paper. I did so, it went well. He then asked some follow up questions. But explained them very poorly. I had to ask many times for clarification. I was not called back for another round.