Microsoft Exam Question 2
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This is an interesting one…
Imagine a disk spinning like a record player turn table. Half of the disk is black and the other is white. Assume you have an unlimited number of colour sensors. How many sensors would you have to place around the disk to determine the direction the disk is spinning? Where would they be placed?
So does anyone feel lucky or know the answer without the assistance of Google?
Of course I had to correct the dodgy spelling of Microsoft US. Note to all Americans, colour has a “u”! Who’d have thought a whole nation could be dyslexic!
Technorati Tags: interview question, spinning disk, Microsoft
Wonko the Sane said,
Wrote on July 13, 2007 @ 11:49 am
I would say, two sensors placed at the same distance from the centre at a few degrees difference.
John said,
Wrote on July 13, 2007 @ 12:13 pm
I’m with you on that. You only need two sensors with a a small separation between them.