WorldQuant Data Operations interview questions

They asked me tons of probability questions and programming questions. This was an operations/support role and the team lead is a fresher (although, he's a PhD) with no industry experience so doesn't really know what to look out for and how to interview for a support role. Also, they call you in to the office, interview and drain you out for over 6 hours. So if you're going to their office, be prepared for that.