I applied online. The process took 5 months.

• Online assessment - sent to me about a week after submitting CV. Had 2 weeks to do it. It's 2 leetcode questions (~medium) so practicing helps. Not a complex algorithm but requires thinking, creativity and discriminant. Got all test cases passing in both questions. All instructions are in their email so no surprises. Then some reliability tests (100+ rapid questions) which I believe we all pass, just say the truth (I've submitted the assessment in December, then only in April got a positive response and scheduled for an interview).
• Online interview - You have 2 consecutive 1 hour (total = 2 hours) online interviews with Amazon employees. Both with exactly the same structure - personality questions which you are expected to answer by Amazon's leadership rules and then a leetcode kinda question, again ~medium level. You are expected to think out loud. Had one with logs sorting and one with parking lot management, succeeded both in optimal solutions (don't worry, got the most general rejection email with no explicit reason 4 days later). Overall - was professional yet no clarity neither reason for non acceptance. Never had this kind of experience and I've interviewed for 15+ job places in hi-tech before. Kinda aligns with what people say about Amazon.

Say you have M log files internally sorted by timestamp, but the files themselves are in non-sorted order and may be overlapping (for example, File1 18:00 - 18:15, File2 17:50 - 19:00). Each line is a log, and they are indexed and have timestamps. How do you print them out in sorted order, WITHOUT loading all into memory and sorting them (say you have a memory limit)?