customer success associate interview questions shared by candidates
There is one light bulb in a dark room, 3 light switches in another room, none of them have windows. You can only enter each room once. How do you find out which switch turns on the light bulb.
An ant is sitting on a corner of a cube. What's the shortest path to get to the exact opposite corner of the cube?
Took me a while - turn on switch 1 for like 2 minutes, this heats up the bulb. Turn it off and turn on switch 2 and go to other room. If light is off and cold, it's switch 3, off and warm, switch one. Nowadays it's possible the heat trick wouldn't work - i.e., an LED might cool off so quickly
For the ant, I'd guess walk to the middle of one of the opposite sides and then to the opposite corner. Both halves of the walk are identical, and it's between the shortest path (walk an edge) and the longest (walk corner-to-corner) for traversing a given face. The math should be easy enough to do to verify.