Uber Software Engineer interview questions

Contacted by Uber. Had phone screen. Interviewed by a young person. Was asked very simple question and was not sure where he is going with that. No follow up questions or any technical discussion (complexity, big O, optimization, design). Interviewer was not interested at all. He just gave good sales pitch but during technical question was completely silent and I was clueless what he really wants since there are so many aspects to discuss and improve but he was not interested in that. Not sure why they wasted my time and assigned incompetent developer for the phone screen.