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A double sided magnetic disk pack has six disks. Can you tell how many surfaces of this pack are normally used?

A. 10

B. 12

C. 6

D. 9

E. None of the above

Answer: Option A

Solution(By Examveda Team)

Extreme surfaces of the disk are more prone to external damage or scratches from outer casing. Due to this, almost all the manufacturers do not use them for recording. Upper layer of first disk and lower layer of last disk is not used, 12 - 2 = 10 surfaces.

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Comments ( 1 )

  1. Pravind Saini
    Pravind Saini :
    6 years ago

    the top upper and bottom side does not contain any tracks.

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