Two Sigma Software Engineer interview questions

Completely slow. First I was presented with a code test, which I did really well. Afterwards, the HR asked me to go for an on-site interview with two different teams. When I do the on-site interview, I was greeted with a very nice, professional guy who's asking me standard programming questions, along with problem solving which I did quite well. Afterwards, the second guy came over. He looks like he just came to the office (he's late). He's one of the most snobby, rude interviewers that I've ever had. He asked me to code a class using computer. I told him I normally use internet to look for Java API (who doesn't these days). I think he doesn't like the fact that I wanted to look for an API used for networking/opening file! The third guy asked me abstract question, he liked me in the end. Soon after he's done, HR told me I'm "done for the day". This second guy is the most unprofessional interviewers I've ever met. I despise two sigma for this reason. You should not make a decision based on some crappy guy's bad morning. I will never come back again.

Coding questions from each person. OO design patterns, some algorithm questions