Microsoft Interview Question: A disc is spinning on a spind... | Glassdoor

Interview Question

Software Development Engineer Interview(Student Candidate) Cambridge, MA

A disc is spinning on a spindle - you don't know which way

 . You are given a set of pins - describe how you would use them to determine which way the disc is spinning.

Interview Answer

4 Answers


Drop the pin on the disc, the disc is spinning in the direction the pin fly's out.

Satish Kandi on Jul 29, 2014

Yes drop the pin onto the disc n see where the pin move..

Radha on Aug 4, 2014

Drop pin by non sharp side and see how it moves.

Ankit on Aug 9, 2014

Hold a pin with it sharp end just touching the disc (assuming it is inside a box and there is only one opening). You will be able to feel the direction of motion of the disc.

Yash Teckchandani on Aug 16, 2014

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