Amazon Intenrship interview questions

I applied for PhD research intern in ML. The interview was very good. Even though I got stuck in some questions, as long as I was thinking aloud, they were keen to guide me. I had three interviews. One where they asked me about probability theory, a second one about programming and a third one with my potential boss in more of an informal setting. The first two included also the Amazon behavioral questions.

3 online assessments and 1 virtual interview through Amazon Chime. The 3 OAs are 1 work simulation, 1 coding interview, and 1 puzzle questions. They're easy to answer. People that have finished the OAs get high probability to have a virtual interview.