Which of the following is a type of optical disc that is rewritable? MCQ with Answer and Explanation

Question
Which of the following is a type of optical disc that is rewritable?
A. DVD-R
B. BD-ROM
C. DVD-RW
D. CD-R
Answer: Option C
Solution (By JKSSB Mock Tests)
DVD-RW is rewritable, allowing data to be erased and rewritten multiple times. CD-R and DVD-R are write-once, and BD-ROM is read-only.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
Which of the following is an advantage of optical storage over magnetic storage?
A. More durable (resistant to magnetic fields)
B. Faster read/write speeds
C. Higher capacity
D. Lower cost per GB
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Correct Answer: Option A

Explanation:
Optical discs are immune to magnetic fields and are relatively durable under normal handling, while magnetic disks can be damaged by strong magnetic fields. However, optical is slower and lower capacity.
This question belongs to: Computer Memory and Storage Devices
Question #2
What is the function of the 'read' operation in memory?
A. To store data to a memory location
B. To move data between registers
C. To retrieve data from a memory location
D. To clear a memory location
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Correct Answer: Option C

Explanation:
A read operation fetches data from a specified memory address and transfers it to the CPU or another component.
This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical capacity of a DVD-RW disc?
A. 25 GB
B. 700 MB
C. 4.7 GB
D. 8.5 GB
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Correct Answer: Option C

Explanation:
DVD-RW has a capacity of 4.7 GB (single-layer). Dual-layer rewritable discs exist but are less common.
This question belongs to: Computer Memory and Storage Devices
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