Mechanical engineering co op interview questions shared by candidates
There are two rooms - one has three light bulbs, the other has three switches. You can go to the room with the bulbs ones. How will you find out which switch turns on which light bulb.
turn two on. then turn one of them off and go to the room. you have one that's on, one that's hot and off and one that's off. there you go.
You disassemble the light fixture and re-wire all of the separate light circuits so that they all become parallel circuits. Now any switch in the other room can turn on all three bulbs.
You can't if your only allowed in the room with the bulbs.
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