So You Think You're a Software Engineer?
My favourite question for a budding software engineer is, "How much do you know about air conditioning?". The answer is almost always "nothing". Same goes for power supply. Some of them have no knowledge of UPSes either.
I wonder how many data centres have been put together by people who forgot to give the aircon plant a back up supply too? Or forget to have back up aircon?
This was the kind of mistake Facebook and Twitter made back in the early days.