Bridgewater Associates Technology Associate interview questions

Quick interview process. I applied through a referral and was immediately contacted by a recruiter. The recruiter was very helpful and also assigned me a bunch of online aptitude tests and programming assignments which is quite difficult and time consuming. It was finding a server deadlock and they explained the question. The recruiter also set up the technical phone screen. The phone screen lasted not more than 45 minutes sprinkled with technical difficulties of the phone getting dropped. The interviewer seemed snappy because of that and seemed to have cut the interview short. The recruiter had promised to respond right away after the interview but went cold turkey on me. Would not respond to a single email (he was very prompt before the interview). Very unprofessional.