Amazon Software Development Engineer interview questions

My interview started around 4 AM IST since it was a campus hiring process. 2 Technical rounds and 1 Technical cum HR. (HR guy was from Singapore, and apparently he was proficient enough to evaluate you, though he claimed he wasn't!) Unlike some other techie Development based SDE interviews, they took the standard approach of evaluating through DSA proficiency.

Was given a four part online assessment. Longest was the first part, with two coding problems on the HackerRank platform. Debugging was a real problem for the larger dataset problems. There was some piping error and HackerRank doesn't allow you to see the output for a lot of the test cases. Then there were also some surprising questions regarding non-relational databases that I was not expecting. One thing that's really relevant to be familiar with is Amazon's core principals. Workplace habit questions seemed to be very much based on this.