Amazon Software Engineer internship interview questions

Started with an online debugging quiz in choice of Java or C++. 5 questions in ~20 minutes. I got through this round having scored 4/5 because I let the time pressure get to me. A couple of days later I got contacted to organise a phone interview. The interview lasted just under an hour with two software engineers on the other end of the line. I was given two problems and found optimal solutions to both. The first one took a while to get through and I felt a bit shaky but blazed through the second one leaving me feeling overall relatively happy. I received my offer the next week.