Amazon SWE Intern interview questions

The interviewer discussed with me 20 mins about my designing experience because my CV had various aspects of designing including product design and graphic design. After that, for 15 mins we had a conversation over the toughest challenge I faced and how I solved it. Then he asked me a Tree-based question, which he took 5 minutes to explain and do the setup. After that only 20 minutes were remaining, so I took 10 minutes to form the algorithm and then spent my last 10 minutes trying to write the code for the same.