COMPUTER FUNDAMENTALS

COMPUTER ARCHITECTURE

SECONDARY STORAGE DEVICES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which of the following shows the capacity of OPTICAL STORAGE MEDIA in the correct order (smallest to largest)?

A	DVD > BLU RAY > CD
B	CD > DVD > BLU RAY
C	BLU RAY > DVD > CD
D	DVD > CD > BLU RAY

Explanation:

Detailed explanation-1: -Correct answer is (D) Floppy Disk, Zip Disk, CD-ROM. Floppy Disks store few MB of data. Zip disks store a few hundred MB of data, usually ranging from100MB to750MB. An8-cm CD-ROM media can store about200 MB of data while a12-cm CD-ROM media can store up to about847 MB of data.

Detailed explanation-2: -A CD can store up to up 700 megabytes (MB) of data. A single-layer DVD can hold 4.7 gigabytes (GB) of data, and a double-layer disk can hold 8.5 GB. A single-layer Blu-ray disk can store 25 to 33.4 GB of data, and a quad-layer Blu-ray disk can store up to 128 GB of data.

Detailed explanation-3: -Option (D) Among the optical storage devices, the blu-ray disk has the highest memory capacity. As the one layered and one-sided blu-ray disc can possess the data up to 50 GB and the double-sided blu-ray hold just double data.

Detailed explanation-4: -The size of a typical CD is about 700 MB. The size of a given DVD is about 4.7 – 17 GB in range.

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