Amazon Software Development Engineer SDE interview questions

Round 1: This round was completely Behavioral the interviewer asked three question and I have answered those in STAR format from my previous experiences Round 2: it was a mix of Algorithms and Behavioral the first 30min was a technical question and the interviewer asked me to design a generic xmlNode class in and it should be adaptable and can be used to create any kind of an xml document. It should also have a toString method implemented which will print that entire xml nodes in pretty print format with nesting and proper attributes for each tag. and then the last 30 mins was a behavioral he asked to question which related to the leadership principles and I have given my answers in STAR format. Round 3: this was completely a technical coding interview the interviewer asked me two questions the first question was 703. Kth largest element from a stream. and Union find (Disjoint sets) question.