Amazon Software Development Engineer interview questions

1st round screening after passing ATS was online on Chime with two engineers, they asked me to implement a function that takes in an int and prints the colors of the rainbow based on which bit was set and go in a circle for bits more than 7. After 3 weeks I got the follow up to schedule 4 more interviews online. 1st was with the same two engineers as the screening, they gave a function in C++ and asked to review and refactor. 2nd was Amazon Leadership Principles interview. 3rd was with a Senior Software Engineer who asked me to code Word Search 2, a hard leetcode problem. 4th and last was with another engineer who asked the same question about reviewing and refactoring.

there was an OA, and a phone round with the recruiter and then a loop with the panel. with medium and hard level leetcode and then system design . . . .