Arcesium interview questions

Some questions around DS, CS concepts, current projects. Round 1: Find a linked list in a tree, min jumps. Round 2: Trie, Java OOPS, Diff bw session, Oauth. After 7 days got a call that I was selected.

Hackerrank round which does not contain any DS but to call two API, combine their results, process it and then give some output (API were related to stock holding and stock price data). Then fitment screening round, interviewer was very arrogant with less patience not polite, continuously asking one question or other, all were basic to your work. Then 3 rounds of interview in first there was design question to design alerting and escalation system, he was more adamant for his own kind of answer, if you say something wrong while designing then you are done e.g. if you say I would use SQL because of this reason and interviewer is keen to use NOSQL then you are gone. He was in lot of hurry. Second technical with basic questions around Java and design ecommerce db. third was two coding questions . Throughout the three rounds after interview everyone would say "they are happy with your design and approach, you design is perfect, they are fine would recommend you" . but finally you would not be shortlisted and you would keep guessing where you went wrong in which round because no feedback is shared. you just get to know whether you are in for next round or not. I hate interviewer to ask the question "Do you have any question for me". Guys please if you are not good with our approach, our design, our coding answers then please don't ask this question. why you bother to ask this typically. This interview is the worst experience, all questions are simple and general but still you are not shortlisted and you keep guessing where things went wrong.