COMPUTER FUNDAMENTALS

COMPUTER HARDWARE

STORAGE DEVICES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two differences between CD ROM and DVD ROM
A
Hold more data than CD-ROM’s
B
CD ROM is used for video recording only
C
Can record Videos in DVD with higher resolutions.
D
CD holds 4.7 GB of data
Explanation: 

Detailed explanation-1: -The most significant difference that you should note here is that a CD has a storage capacity of about 700 MB, while a DVD has a comparatively higher storage capacity, ranging from 4.7 GB to 17 GB.

Detailed explanation-2: -It is similar to a compact disk-read only memory (CD-ROM) but has a larger capacity. A DVD-ROM stores around 4.38 GB of data. A CD-ROM usually stores 650 MB of data. A DVD-ROM permanently stores data files which cannot be changed, written over or erased.

Detailed explanation-3: -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-4: -DVD-R vs CD-R While DVD-R stands for Digital Versatile Discs-Recordable, CD-R stands for Compact Disc-Recordable. The basic difference between the two lies in the amount of data they can store. While a CD is able to store only 700 MB data, a DVD-R can hold up to 4.7 GB of data.

Detailed explanation-5: -A DVD audio disc can store up to two hours of 6-channel, better than CD quality, 96kHz/24-bit music. Lower the specifications further, and a DVD audio disc can hold almost seven hours of CD-quality audio.

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