Amazon Software Engineer interview questions

(Online round): 20 MCQs + 2 Coding Questions In hackerrank platform , then 3-4 Interview round, in mcqs ds, apti, os, dbms questions. coding question:1 vertical sum in binary tree 2.find number of subarray of given sum MCQs are very simple and sum of them are from java also i solved like C++.

I applies through university and then got through from the first round. First round- online. 20 mcqs and 4-5 programming questions. Second round- Written test. 2 questions. paper and pen based. Third round- consisted of 2-3 face to face technical rounds of questions. No hr questions at all. The interview process was fine. I Don't know why i didn't make it. I think they are looking for people with great technical knowledge. Answer every question with great confidence DO NOT get confused no matter how much they try.