I applied in-person. I interviewed at WorldQuant (Taipeh) in May 2020
Interview
You have pen & pencil & 10min to think about it. If you don't have answer, you can still keep talking about your idea. You can ask questions, they'll tell you whether they can answer this question.
Interview questions [1]
Question 1
You are on "0" index of a X line at the beginning. There is a black hole on 2N and another black hole on -N. At every position there's equal probability of going left or right. When you arrive one of the black hole, the process is end. What's the probability that you end up at the black hole at index 2N?
I applied through other source. I interviewed at WorldQuant (Seoul) in Apr 2022
Interview
First I submit my resume. Then take Math online test. When passed online test, take interview about resume. After that, take Math interview about 3times. When passed above interviews, maybe have a interview for contract.
Long and many interview processes. Resume - OA - prescreen interview - several tech interviews. I remember OA was really hard for me. I could not preceed from the second tech interview.