WorldQuant Quantitative Researcher interview questions

Many technical and mathematical problems asked, no paper nor calculator. Highly focused on probability and statistics. The guy who interviewed me is the director of Bangkok branch and he is very keen and intelligent.

Two face-to-face interview. ask about some experiences of my internship, and also few classic braineasier. Then four phone interview with Portofolio Manager, all are technical questions like the face-to-face interview. Then the last round is to meet the HR.