DraftKings Software Engineer interview questions

I was called for a technical phone interview in which I was asked to write code for a question comparing a few user's total scores and then give each user a competitive rank. The interviewer asked me to talk through the code as I wrote it. Part of the question involved sorting and I very honestly told him I didn't remember much about the built-in Java sort. He posted a link to documentation for it which led to me asking if I was allowed to look up documentation online during the interview. He acted as if I should have known that from the beginning despite not ever telling me. It took me about 20 minutes or so to write out a solution and then he began to ask me questions about it. At one point he asked me about a function I wrote to compare elements in a list pointing out that return type should be different than the one I had. Despite me explaining that the return type I had was correct, which it was, he argued with me until I changed it to the type that he wanted. At the end of the first question, he asked me if I could improve the solution I had. I explained the best way of doing it that I realized after I finished my first solution. His response to this was telling me, "Yeah that's how I would have done it the first time around," in a very rude and matter-of-fact kind of tone. Finally he asked me another quick question which involved finding the intersection of two rosters of players. I was just asked to talk through this question and ended up coming up with solution very quickly. I asked him what the next steps were in the interview process and he said they would get back to me within the next two days. They emailed me back 4 hours later rejecting me with no explanation.

I went with the career services at UMass Amherst and interviewed in a cubicle. The interview questions were pretty basic algorithmically but required you to understand the domain of the problem and how complicated things can get. About 45 mins interview, and coded on paper. They are probably going to change this process as they grow but it was very relaxed and fun.