Amazon Software Engineer(Internship) interview questions

I applied in January 2019. And past the OA, after 3 weeks, there was one round virtual onsite. In the virtual onsite the interviewer asked several behavioral questions and a medium algorithm question. The feedback is pretty good.

Initial online phase - remotely appeared for 4 hours long online assessment and got shortlisted for onsite. As mentioned it was 2 hours long interview. The experience was meh - first I arrived at site 30 minutes early. The scheduled interviewer was not present so my 1st interview got delayed and pushed into odd slot where the new interviewer allotted had a little communication gap. It went okay, but was little hard with expressing the solution to him. Then I got to interact with the programme recruiter she was super nice and thoughtful. She shared her experience in Amazon and how interns/new joiners were treated. For a 2 hours slot turned into 4 hours another interviewer who was super chill got with a question related to Graphs (DS). Which I answered though with O(n) approach whereas he was looking for O(n.logn) approach which couldn't strike my mind.