Technical Design Interview Questions

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You have 3 light bulbs upstairs and 3 light switches downstairs but don't know which switch connects to witch bulb. How can you switch the bulbs once and then go upstairs and immediately know which switch belongs to which bulb?
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Mechanical Design Engineer

Interviewed at Apple

4.1
Dec 1, 2016

You have 3 light bulbs upstairs and 3 light switches downstairs but don't know which switch connects to witch bulb. How can you switch the bulbs once and then go upstairs and immediately know which switch belongs to which bulb?

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