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There are three light bulbs in room A and three switches (for each of the bulb) in room B. You cannot see room A from room B (vice versa). You are allowed to visit both room A and room B once and you'll need to tell which switch corresponds to which light bulb. How to do it??My friend claimed that this was asked during recruitment interview. Wonder who could think clearly during such time and with such hard question (I can't, think of the answer, even without pressure 
answer to be provided tomorrow ......
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