What is the physical medium used in a hard disk to store data? MCQ with Answer and Explanation

Question
What is the physical medium used in a hard disk to store data?
A. Aluminum or glass platters coated with magnetic material
B. Silicon chips
C. Polycarbonate layer
D. Metallic tape
Answer: Option A
Solution (By JKSSB Mock Tests)
Hard disks use platters made of aluminum or glass, coated with a thin magnetic layer that stores data in the form of magnetized regions.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
A standard double-layer DVD can store approximately how much data?
A. 25 GB
B. 4.7 GB
C. 8.5 GB
D. 700 MB
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Correct Answer: Option C

Explanation:
A standard single-layer DVD stores 4.7 GB, while a dual-layer or double-layer DVD can store up to 8.5 GB of data.
This question belongs to: Computer Memory and Storage Devices
Question #2
What does the term 'Memory Footprint' refer to in software and systems administration?
A. The amount of carbon emission produced during memory manufacturing.
B. The total amount of main memory (RAM) a program consumes while running.
C. The physical dimensions of a RAM chip.
D. The historical layout of old memory tracks on a legacy drive.
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Correct Answer: Option B

Explanation:
The memory footprint represents the quantity of physical or virtual memory runtime space an active application requires or occupies while executing operations.
This question belongs to: Computer Memory and Storage Devices
Question #3
Which phenomenon occurs when a program continuously swaps pages between RAM and secondary storage due to inadequate primary memory space?
A. Thrashing
B. Fragmentation
C. Interleaving
D. Paging
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Correct Answer: Option A

Explanation:
Thrashing occurs when the operating system spends more time moving system resources between virtual and physical memory than actually executing process instructions.
This question belongs to: Computer Memory and Storage Devices
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