G-Research Quantitative Analyst interview questions

First, there's an online technical quiz to do, then you go straight into a 1hour online technical interview. The quiz was quite hard, I thought I had done terribly (I definitely got below 50% of questions correct), but still managed to pass to the next stage. Interviewer of the next stage was not particularly nice, after a quick introduction, he moved straight into questions, and left 5 minutes at the end for me to ask him questions about his job.

Reached first interview which was composed of a series of coding and statistics questions (bayes rule). The coding question was in Python and delt with data structures. They also asked about my previous experience in relation to maths/coding.