I have a coding session when I interview a candidate. A very simple problem they have to work on with a junior dev we have on staff. The goal is not to get the answer, it's to work efficiently with the less experienced dev.

I'm sure you know how to write a for loop or a singleton, but guess what? If you are a senior I care about how you interact with somebody who does not know these things.

A 10+ year of XP developer has to be passed being a code monkey and be focusing on carrying the team, not just fire up an IDE and piss out some code.