Was mainly online and the questions asked were standard data structure and algorithms questions, pretty straightforward application and interview process. Along with BFS traversal was also asked some questions about linked lists and how to implement a stack/queue using a linked list.
I applied through college or university. I interviewed at Amazon
Interview
Take home assessment, and then phone interview. Both were fairly easy. But no real recruiter actually talked to me during the whole process, everything was via automated emails, so it felt very impersonal.
Applied online. Online assessment with three parts then virtual interview. Virutal interview was about 10 minutes behavioral, then the rest of the 45 minutes was a question about streams