I gave them the definition of Ohm's Law, And I drew an electrical diagram with the components asked for. The main thing to remember during this whole interview process is that not only are they looking for what you know, they're looking for your honesty and work ethic. They really don't put much emphasis on your skill set, because most of the technicians learn as they go here. They want to know that your an honest employee and will shoot them an honest answer if comforted with a situation that you may be faced with