COMPUTER HARDWARE COMPONENTS FUNCTIONS
EXTERNAL AND INTERNAL STORAGE DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Detailed Solution. The correct answer is It provides only sequential access to stored data. It provides only sequential access to stored data is not true of a magnetic disk.
Detailed explanation-2: -They store data in the form of magnetized spots in adjacent circular tracks on the surface of a metal cylinder. A single drum may carry from one to 200 tracks. Data are recorded and read by heads positioned near the surface of the drum as the drum rotates at about 3, 000 revolutions per minute.
Detailed explanation-3: -How is data stored on a hard disk? Data is stored on a hard drive in binary code, using 1s and 0s. The information is spread out on the magnetic layer of the disk(s) and are read or written by the read heads that ‘float’ above the surface thanks to the layer of air produced by the ultra fast rotation of the disk.
Detailed explanation-4: -Hard drives use magnetism to store information in a layer of magentic material below the surface of the spinning disk. If you were to look at high magnification at the surface of the platter of a typical hard disk, you would see images similar to those on the right.