Amazon Software Development Engineer (SDE I) interview questions

I am PhD student. First I applied to postion related to my research field and I passed coding test. There were two techical interviews. They asked my research background and tested if I have a base knowledge about their work.

Started with a coding test. Two intermediate level questions that weren’t too tough. If you pass that you have an online behavioral test which followed their leadership principles closely. Third interview was the only in person interview and it was just walking through my code.