Mobile Engineer Interview Questions

3,457 mobile engineer interview questions shared by candidates

A rotating disc has one half black and one half white. With a variable number of sensors that can either detect whether black or white and a constant rpm of the disc rotating, how can you design a system that would be able to tell whether the disc is rotating clockwise or counter-clockwise. How many sensors would you need and how often would they have to take a snapshot? etc.
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Mobile Developer

Interviewed at Avvo

3
May 5, 2014

A rotating disc has one half black and one half white. With a variable number of sensors that can either detect whether black or white and a constant rpm of the disc rotating, how can you design a system that would be able to tell whether the disc is rotating clockwise or counter-clockwise. How many sensors would you need and how often would they have to take a snapshot? etc.

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