[jgalloway___]

Looking over their public work experience and perhaps open source contributions you will already know if this person will be a good fit.

When tasked to interview I have found that asking a question which you know the candidate will be unable to answer will show you the most-intriguing parts of their character. Something deceptively simple like a puzzle or logic problem but scales up quite quickly.

This is when you can learn things about them that they would not put to paper and thereby determine if they are for you.