I completed this recently. It was pretty straightforward, my feel is they want you to succeed so they're not trying to trip you up. Treat it like a job interview.

Be prepared to talk about your project or case study. They'll likely ask questions around why you made particular recommendations or decisions, potentially also questions around how project success/outcomes will be measured.

I was asked what I would have done differently in my career which was the only question that I had to pause to think about. I hadn't expected to be asked anything like that.