They didn't ask any technical questions but your basic trying to figure out if you're a fit.
When they told me the current department size of zero, I asked how many engineers did they plan to bring on. One, the manager. And then there would be one or two engineers added later on but not in the immediate future. I told them their goals weren't realistic given the timeline and the number of people. One had to give. They didn't like that. It was, however, true.
I think the work would have been interesting but I already had two other offers. They never got back to.