And that is entirely fine. I'm all for group white boarding exercises, or pair programming. I think there's a lot of value to be had in making sure the other person can communicate in a technical setting effectively, and explain why they make choices.

Likewise, if someone wants me to walk them through a project I have with explanations of what choices I made and why, I'm happy to do that. But please don't waste my time asking me to implement DFS, or write another twitter API client.