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

What is the typical capacity of a single-layer DVD in bytes?
A. 4.7 GiB
B. 4.7 GB (4.38 GiB)
C. 4.38 GB
D. 4.38 TB
Answer: Option B
Solution (By JKSSB Mock Tests)
A single-layer DVD has a capacity of 4.7 GB (decimal) or 4.38 GiB (binary). For exams, they often say 4.7 GB.

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Practice More Memory and Storage Devices Questions

Question #1
What is the typical rotational speed of a high-performance desktop hard disk in 2026?
A. 7200 RPM
B. 10,000 RPM
C. 15,000 RPM
D. 5400 RPM

Correct Answer: Option A


Explanation:
7200 RPM is common for desktop HDDs, while 5400 RPM is for energy-efficient or external drives. High-performance drives may be 10,000 RPM or more, but 7200 is standard.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which type of flash memory cell stores exactly three distinct bits of data inside a single physical transistor by managing eight distinct voltage levels?
A. Triple-Level Cell (TLC)
B. Single-Level Cell (SLC)
C. Multi-Level Cell (MLC)
D. Quad-Level Cell (QLC)

Correct Answer: Option A


Explanation:
Triple-Level Cell (TLC) flash memory architectures design cells to retain 3 distinct bits of binary data per transistor by utilizing 8 different internal voltage states.

This question belongs to: Computer Memory and Storage Devices
Question #3
In the context of memory, what does 'volatile' mean?
A. Memory cannot be written
B. Memory retains data without power
C. Memory is permanent
D. Memory requires power to retain data

Correct Answer: Option D


Explanation:
Volatile memory loses its stored data when the power supply is turned off. RAM is a classic example of volatile memory.

This question belongs to: Computer Memory and Storage Devices