This is how I prefer to use it as a tool. Rather than set up difficult questions and test some algorithm that can be found with a decent google, set up a small

This is how I prefer to use it as a tool. Rather than set up difficult questions and test some algorithm that can be found with a decent google, set up a small number of relatively straightforward challenges. This then filters out anyone who just can't code, and you can review the passing tests for craftsmanship.