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By ______ an area on disk in certain ways, one can make it represent a bit value of either zero (0) or one (1).

  • A.Vulcanizing
  • B.Galvanizing
  • C.Magnetizing
  • D.Passing UV rays

Answer: C

Correct answer: Magnetizing

A disk surface is coated with a magnetic material, and writing a bit means magnetizing a small region in one of two directions, which the head later reads back as 0 or 1.

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