One phone interview was riddles to see if gage my troubleshooting techniques. That was pretty cool. HR phone interview was horrible as they had a bad attitude everytime I spoke with them.
example riddle:
There is a room with a door (closed) and three light bulbs inside the room. Outside the room, there are three switches, connected to the bulbs. You may manipulate the switches as you wish, but once you open the door you can’t change them. All bulbs are in working condition and you can open the door only once. Identify each switch with respect to its bulb.