This. A thousand times this. Each candidate is different. You should be asking questions to figure out what they know. Requiring specific experience is often a

This. A thousand times this. Each candidate is different. You should be asking questions to figure out what they know. Requiring specific experience is often a bad idea, because, for example, I can train you how to use our custom codebase, but I don't have time to train you on basic coding skills. You should be able to fully describe a project you built, from start to finish, discussing problems and obstacles and their solutions. I also think it's perfectly okay to say "I don't know off the top of my head, but I can find out" when asked a question. Or alternately, "I don't know off the top of my head, but based on what I know about other things, I would start here..."