I mean you can make one up or search the records for how other people did it?
Here are two prior exams:
If it were me, I think the purpose of the oral exam is to see if you actually have the skills to be something like a diplomat or politician. This means that you need to be able to speak elegantly to a degree? Keep your cool if you are insulted? Be persuasive? A variety of different things.
Like if I wanted to make something up in 60 seconds, I would maybe say there's a room of 3 examiners. You're given a scenario, like negotiating with the enemy to release some hostages. One of the examiners will roleplay the enemy, and the exam constitutes watching how you would go about performing the negotiation.
But this is just my imagination, and I'm sure that other people would have different ideas.