It's a 3-step interview. The first one with the recruiter for screening. When I told him I enjoyed working for companies with prestige, he said "well, we only have 5% of the market", so that was weird. Next interview was with a manager on another analysis department. They go very hardcore on one case regarding that is very basic statistic/algebra. I did not understand the first question correctly as it was worded a little different, yet it was a very easy mistake to fix. I've read that there is not a "good" or "bad" answer, but this specific manager did want me to get the exact number. I got an email saying they did like me strengths and my resume match what they were looking for, yet others performed better in the case.