My favorite sorts of interviews are ones where you're expected, either by pairing with an employee on your own, to fix a bug in an open-source project you use.

My favorite sorts of interviews are ones where you're expected, either by pairing with an employee on your own, to fix a bug in an open-source project you use. Has all of the benefits of a take-home project over whiteboarding, but the end result is you have something tangible to show for your efforts even if you don't get the job.