Amazon's interview process is known for its focus on problem-solving, data structures, algorithms, and optimizing solutions for efficiency. The feedback to "reduce complexity" suggests that the interviewers were looking for solutions that are not only correct but also optimized in terms of time and space complexity.

Four 1-hour interviews with 4 different leads. The interview consisted of a "Describe a time" question and then a whiteboard coding session. There was a 30 minute break between the first two and the last two. Generally these interviews were friendly, but whiteboarding code is usually stressful.