Block Software Intern Summer 2014 interview questions

An employee referred me to the recruiter. The first step was an online test to make sure that you know how to write code in your chosen language -- fairly easy. Then, I had a phone screen with a Square engineer where we solved a problem using a collaborative code editor for 45 minutes, and discussed the company and its work environment for the remaining 15 minutes. This question was fairly easy too, and the guy was cheerful & supportive. They invited me to visit their office for a day of interviews, but unfortunately, I was not able to attend in person. So instead, we waited for Square to visit my campus for a 1-hour interview. Square claims on its engineering blog that the interview process is "pair programming" -- this is an exaggeration at best. I implemented the code while explaining my reasoning, but the interviewer kept cutting me off by saying "you don't have to say that" / "you don't have to tell me that." About halfway through, he started responding to emails and pull requests on his computer.