The VCDX Potential vSphere Feature Questions box included potential VMware vSphere specific technical questions. So any vSphere technology that can be tied to the current slide.
Here are some of the boxes from my defense slides:
You might be thinking, isn’t that what he did on the deep dive slides? Yes and no. Some of this stuff had a deep dive slide, but most if it didn’t.
I created answers that answered each question in this format: Explain X? What does X do? What impact would have X done if you configured it the other way? (impact meaning design impact, which in turn can be risks, or changes to interconnected design decisions)
That way I could answer how each of the technology would impact my design and its decisions.