Interview questions for ASP developers

I'm leaving my place, and we need to find a replacement. I'm looking to put togther a short (probably written) test for candidates. Nothing too hardcore, just to weed out the hopefuls. I've got about 7 years ASP and someone with that level of experience should fit the bill nicely.

Any suggestions?

Give them a simple program to write. Have them explain their code to you as part of the test.