What is the typical capacity of a single-layer BD-R (Blu-ray recordable) disc? MCQ with Answer and Explanation

What is the typical capacity of a single-layer BD-R (Blu-ray recordable) disc?
A. 50 GB
B. 128 GB
C. 25 GB
D. 4.7 GB
Answer: Option C
Solution (By JKSSB Mock Tests)
Single-layer BD-R holds 25 GB, dual-layer 50 GB, and triple-layer 100 GB or more. Standard Blu-ray is 25 GB.

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Practice More Memory and Storage Devices Questions

Question #1
What is the primary advantage of an SSD over a traditional hard disk?
A. Higher capacity
B. No moving parts, faster access
C. Lower cost per GB
D. Longer lifespan

Correct Answer: Option B


Explanation:
SSDs have no moving parts and use flash memory, providing much faster read/write speeds and lower latency compared to HDDs, which rely on spinning platters and mechanical heads.

This question belongs to: Computer Memory and Storage Devices
Question #2
Which of the following is a valid memory unit in the SI system?
A. Gigabit
B. Kilobit
C. Megabyte
D. All of the above

Correct Answer: Option D


Explanation:
Bits and bytes with SI prefixes (kilo, mega, giga) are all valid units. However, in computing, binary multiples are more common for memory capacities.

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical data transfer rate of a USB 3.1 Gen 1 (same as USB 3.0) port?
A. 10 Gbps
B. 480 Mbps
C. 5 Gbps
D. 20 Gbps

Correct Answer: Option C


Explanation:
USB 3.1 Gen 1 is the same as USB 3.0 and has a max rate of 5 Gbps. USB 3.1 Gen 2 is 10 Gbps, USB 3.2 Gen 2x2 is 20 Gbps.

This question belongs to: Computer Memory and Storage Devices