I've seen a couple articles on HN regarding aptitude tests for finding qualified developers during a interview processes. Being that I'm fairly new to the development world, I've found these tests to be an interesting way to challenge myself and gauge my own aptitude. I found a couple of these challenges through a recent article on HN http://www.codinghorror.com/blog/2007/02/why-cant-programmers-program.html.Does anyone know where I can find more random challenges? Someone pointed me to codegolf.com but the site seems to be down.