Question

Which storage device uses optical technology to store data?

• A. Hard Disk
• B. CD-ROM
• C. RAM
• D. Cache Memory

Hint:

Storage Technologies:
• CD/DVD/Blu-ray $\rightarrow$ Optical Storage.
• Hard Disk $\rightarrow$ Magnetic Storage.
• SSD $\rightarrow$ Flash Memory.
• RAM $\rightarrow$ Semiconductor Memory.

Answer 1

The Correct Option is B

Concept: Optical storage devices store and retrieve data using laser beams. The laser reads tiny pits and lands present on the surface of the optical disc. Common optical storage media include:
• CD-ROM
• CD-R
• DVD
• Blu-ray Disc

Step 1: Understand optical storage technology.
Optical storage devices use: \[ \boxed{\text{Laser light to read and write data.}} \] The information is permanently stored on a circular optical disc.

Step 2: Analyse the given options.

• Hard Disk -- Uses magnetic storage technology.
• CD-ROM -- Uses optical (laser) technology. (Correct)
• RAM -- Semiconductor memory.
• Cache Memory -- High-speed semiconductor memory.

Step 3: Know the characteristics of CD-ROM.
CD-ROM stands for: \[ \boxed{\text{Compact Disc -- Read Only Memory}} \] Its features include:
• Optical storage medium.
• Data can only be read, not modified.
• Capacity is approximately 700 MB.
• Commonly used for software distribution and multimedia storage.

Step 4: Final conclusion.
Therefore, the storage device that uses optical technology is: \[ \boxed{\text{CD-ROM}} \]