WorldQuant interview questions

Multiple rounds of online tests (2/3 separate rounds. You automatically are invited to the next round if you do well enough) followed by interviews with current researchers and senior management. Usually quite quick regarding turnaround.

Online Assessment followed by three rounds of phone interviews with one or two interviewers in each round. The interviewers and recruiter are all very nice. Be attentive to hints would be really helpful when you can't give out the right answer for the first try.