junior field engineer interview questions shared by candidates
if you have 2 candles with wicks on both ends and 1 takes 1 hour to melt completely, how do you tell, without measuring, when 45 minutes has passed
Take one candle and light both ends. This will take 30 min. to burn through. When you light up both ends of that one candle, take the other candle and light one end of it. When the candle with both ends burns out, light the last remaining end of the second candle, This will take 15 min. to burn because half of the candle is already gone.
There is another option (although it's a bit quirky): 1) Line the 2 candles up so that they are parallel (like an equal sign) 2) Light the OPPOSITE ends of each candle 3) When the flames of the candles cross paths you have 30 minutes 4) Push one of the candles at one end (the unlit end) until it lines up with the other candle 5) When the flames of the candles cross paths again you have 15 minutes. 30+15 = 45. I prefer this scenario because you still have some candle left to use (for a harder problem), and you only need to light the candles once =D.
As a field engineer you will be managing personnel with as much as 25 years of experience. How will you handle a situation where they are performing the work incorrectly?
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