COMPUTER HARDWARE
STORAGE DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Using a high powered laser
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Using pits which represent 0s and 1s
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With complex circuitry
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With tiny magnets representing individual bits
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Detailed explanation-1: -The information is stored in the magnetic layer by creating small magnetic domains in this material. Magnetic domains are regions of the material which have the same direction of magnetic moment.
Detailed explanation-2: -Magnets are widely used for computer memory because their “up” or “down” polarity–the magnetic state–can be “flipped” to write or encode data and store information. Magnetic memory is nonvolatile, so information can be stored on devices without refreshing.
Detailed explanation-3: -The hard drive contains a spinning platter with a thin magnetic coating. A “head” moves over the platter, writing 0’s and 1’s as tiny areas of magnetic North or South on the platter. To read the data back, the head goes to the same spot, notices the North and South spots flying by, and so deduces the stored 0’s and 1’s.
Detailed explanation-4: -In computer disk storage, a sector is a subdivision of a track on a magnetic disk or optical disc. Each sector stores a fixed amount of user-accessible data, traditionally 512 bytes for hard disk drives (HDDs) and 2048 bytes for CD-ROMs and DVD-ROMs.