Amazon

I directly received an OA (Online Assessment) via email from HR. It was done too late, so they no longer had any headcount remaining. There was no other process. It wasn't difficult, but there were a lot of corner cases.

I was contacted by a manager. I scheduled a phone screen and onsite rounds. I was asked questions on binary trees, DFS, and scheduling. I felt the interview was okay, but my design round did not go well.

The final interview loop was almost 4 hours long. It was separated into 4 individual sections, and the questions were very fair. Definitely study data structures, as there were several problems involving trees.