Discussion
CD–ROM is a kind of?
Answer: C
Correct answer: Optical disk
A CD-ROM stores data as pits and lands pressed into a reflective layer and reads them with a laser beam, so it is an optical disk. Magnetic disks record by magnetising a coating and read it with a head, and a magneto-optical disk combines both techniques - a laser to heat the spot, a magnetic field to write it.
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