I've interviewed for 3D graphics jobs and interviewed others. I was definitely only interested in whether the person had the skill to find a solution.

For my first 3D game dev job I just turned up with a floppy which had my 3D engine on it and got them to stick it in a PC. That was all that it needed to get hired. That and be incredibly naive about salary negotiations :D

I also turned down a possible position at Argonaut at Star Fox time. I got that one by arguing repeatedly with Jez San on Usenet lol