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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Two differences between CD ROM and DVD ROM
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Hold more data than CD-ROM’s
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CD ROM is used for video recording only
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Can record Videos in DVD with higher resolutions.
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CD holds 4.7 GB of data
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Explanation:
Detailed explanation-1: -The main reasons behind the larger storage capacity of a DVD as compared to a CD are that the DVD provides dense packing of the data bits, uses a laser beam of shorter wavelength, and uses a two-sided disc.
Detailed explanation-2: -The size of a typical CD is about 700 MB. The size of a given DVD is about 4.7 – 17 GB in range. It has a total of only one layer of pits. It has a total of double layers of pits.
Detailed explanation-3: -This really depends on the disc. An NTSC DVD-Video disc must contain one of two audio formats, Dolby Digital, which is a lossy compression system, or LPCM which is the same thing used on an Audio CD only a DVD would use 48khz instead of 44.1.
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