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Question

One of the popular mass storage device is CD ROM. What does CD ROM stand for?

A
Compactable Read Only Memory
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B
Compact Data Read Only Memory
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C
Compactable Disk Read Only Memory
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D
Compact Disk Read Only Memory
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Solution

The correct option is D Compact Disk Read Only Memory

One of the popular mass storage device is CD ROM. What does CD ROM stand for Compact Disk Read Only Memory.

Stands for "Compact Disc Read-Only Memory." A CD-ROM is a CD that can be read by a computer with an optical drive. The "ROM" part of the term means the data on the disc is "read-only," or cannot be altered or erased. ... The first CD-ROMs could hold about 600 MB of data, but now they can hold up to 700 MB.

Short for Compact Disc-Read Only Memory, a CD-ROM (shown right) is an optical disc which contains audio or software data whose memory is read only. A CD-ROM Drive or optical drive is the device used to read them.

Although the disc media and the drives of the CD and CD-ROM are, in principle, the same, there is a difference in the way data storage is organized. Two new sectors were defined, Mode 1 for storing computer data and Mode 2 for compressed audio or video/graphic data.

Inside your CD player, there is a miniature laser beam (called a semiconductor diode laser) and a small photoelectric cell (an electronic light detector). ... The laser (red) flashes up onto the shiny (under) side of the CD, bouncing off the pattern of pits (bumps) and lands (flat areas) on the disc.


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