Flipkart Software Development Engineer-1 interview questions

Three interviews in total was scheduled in a day. The first round was machine coding round, which was taken by SDE 2 who was in some hurry it seemed every 10 mins he kept interrupting whether I am done or not,even though it was a round which is supposed to be dome within 90 mins, because of the interviewer as he was in some kind of hurry. The question was relatively easy. The interview asked to draw UML diagram, when I asked which UML diagram you want me to draw he said class diagram is UML diagram🤣🤣, which clearly shows what is the level of SDE 2's in the organization. The PS/DS round was fairly easy. The interviewer seemed confused he didn't know how to iterate over maps and how iterating over maps will take O(n) time(if there are n keys). After 2nd round, I had to wait for 1.5 hrs for the engineering manager to arrive apparently he was busy( as if the interviewee's time comes for free), the managerial round was purely behavioural only question related to current work no questions related to current work's technicalities.