>"can you actually do these things your CV claims you can?" Yeah but how many questions must you ask before you are certain? Otherwise you're rolling the dice

>"can you actually do these things your CV claims you can?" Yeah but how many questions must you ask before you are certain? Otherwise you're rolling the dice that the candidate has simply seen that problem before but has terrible habits otherwise. Reduce the time required and you risk more false positives. Increase the time required, and you risk the skilled ignoring you.