Computing And General Studies (CGS) Practice Exam

Which of the following is an example of optical media?

DVD USB HDD SSD

Correct Answer:

DVD

Explanation:

Optical media are storage discs that use light to read data. A DVD fits this idea because its data is encoded as tiny pits and lands on a reflective surface, and a laser in the drive reads those patterns by detecting changes in light reflection. The other options store data electronically rather than with light: USB uses flash memory connected via USB, hard disk drives store data on magnetic platters read by magnetic heads, and solid-state drives use flash memory with no moving parts. So a DVD is an example of optical media, while the others are not.

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