While it's interesting that you got sensible answers, I also think it's too subjective to be a good question. Some people exaggerate their skills, while others are too modest. Some people might think you are testing their self-confidence, while others might think you are laying a trap.
I would simply ask technical questions and judge for yourself. Some whiteboard coding can't hurt.
I would simply ask technical questions and judge for yourself. Some whiteboard coding can't hurt.