Firstly, there is a test in probability, machine learning and programming to access your basic knowledge in these subjects. If you pass the test, you go on to HR interview about your motivations for applying.
Finance applicants have rated the interview process at G-Research with 2 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 51% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -