What is the typical capacity of a DVD-ROM in bytes? MCQ with Answer and Explanation

What is the typical capacity of a DVD-ROM in bytes?
A. 8.5 GB
B. 25 GB
C. 4.7 GB
D. 17 GB
Answer: Option C
Solution (By JKSSB Mock Tests)
Standard DVD-ROM holds 4.7 GB (single layer) or 8.5 GB (dual layer). But the most common is 4.7 GB.

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Practice More Memory and Storage Devices Questions

Question #1
What is the rotational latency of a hard disk?
A. Time taken for the desired sector to rotate under the head
B. Time taken to write data to the disk
C. Time taken to move the head to the correct track
D. Time taken to read data from the disk

Correct Answer: Option A


Explanation:
Rotational latency is the delay caused by the time it takes for the desired sector of the disk to rotate under the read/write head. It depends on the disk's rotational speed (RPM).

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the data storage capacity limit of an older, standard single-density 5.25-inch floppy disk?
A. 2.88 MB
B. 1.44 MB
C. 720 KB
D. 360 KB

Correct Answer: Option D


Explanation:
Early double-sided single-density or double-density 5.25-inch floppy disks used on classic PC hardware typically maxed out around 360 KB of capacity.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the function of a memory scheduler?
A. To control page faults
B. To reorder memory requests to maximize performance
C. To allocate memory to processes
D. To manage cache lines

Correct Answer: Option B


Explanation:
A memory scheduler in a memory controller reorders incoming read/write requests to optimize bandwidth and reduce latency, improving overall performance.

This question belongs to: Computer Memory and Storage Devices