Many of the items aboveother answers are good.
At my test I was asked questions about the lineage of my style - who the founder of the style was, who my teacher learned from, basic stuff like that.
You might also want to ask questions about what techniques, forms, etc. the student feels are his or her best - it'll give you an idea of what to look for during the testing, and whether the student has an accurate view of his or her own abilities.