Amazon Software Development Engineer interview questions

I was contacted on LinkedIn and had to attend an online test, clearing which the interview was scheduled. I was able to attend only two technical rounds. In 1st round I was stuck on a problem that required quick sort, and made 1 or 2 code errors on paper for the BFS/DFS question. 2nd round went all well, but I guess 1st round was the reason I didn't make it to the 3rd round.

There were 28 MCQs mostly based on stacks, queues, predict the output, Sorting, and Binary Trees and 2 coding questions. In total there were three rounds. First was the online test, then a technical interview followed by HR round.