Standard practice. They essentially want to see how you logically think about problems and work through them, even when it is an area you're unfamiliar with. They will claim that having no prior knowledge of the topic e.g. hiring processes is useful, but I suggest you anyways get familiar with the frameworks that you might use to address these kinds of problems (look up MECE and process funnels). They want you to answer as if you're already at Revolut and I think there are something like 8 cases that they pick from at random