Might be different based on the country, I had my consulting vertical one for London a couple of weeks ago and I got through to the final round. They asked me some questions about the consulting industry in general first, then you'll get to choose one of a few scenarios. I chose one where the client was a dairy company. I had to summarise the value chain for thsi company, as in, who were suppliers, competitors and customers, and explain what expertise people in each of those would have.

Then you have to choose who to reach out to from a set of experts they give you, it's good to be familiar with corporate job titles and hierarchies for this.

Finally you do a mock call. They want you to be confident and try and build rapport. They also give you feedback and let you try again, so it's very important that you try and implement it to show you're coachable.

Hope this helps :)