What is the typical capacity of a standard dual-layer Blu-ray disc? MCQ with Answer and Explanation

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What is the typical capacity of a standard dual-layer Blu-ray disc?

A. 100 GB

B. 25 GB

C. 128 GB

D. 50 GB

Answer: Option D

Solution (By JKSSB Mock Tests)

Dual-layer Blu-ray (BD-50) holds 50 GB. Triple-layer (BD-100) holds 100 GB. Quad-layer (BD-128) holds 128 GB, but standard dual-layer is 50 GB.

This question belongs to: Computer Memory and Storage Devices

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Question #1

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Which of the following is a type of memory that is used for storing the operating system in a smartphone?

A. DRAM

B. SRAM

C. eMMC

D. ROM

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Correct Answer: Option C

Explanation:
Smartphones use eMMC or UFS flash storage for the operating system and apps, while DRAM is used for runtime.

This question belongs to: Computer Memory and Storage Devices

Question #2

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What is the typical capacity of a single-layer Blu-ray disc?

A. 50 GB

B. 25 GB

C. 100 GB

D. 4.7 GB

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Correct Answer: Option B

Explanation:
A single-layer Blu-ray disc can hold about 25 GB of data. Dual-layer discs hold 50 GB, and triple/quadruple layers can go higher.

This question belongs to: Computer Memory and Storage Devices

Question #3

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What is the function of a page table in virtual memory?

A. To allocate memory to processes

B. To manage disk I/O

C. To map virtual pages to physical frames

D. To store the contents of cache

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Correct Answer: Option C

Explanation:
A page table is a data structure used by the MMU to translate virtual addresses to physical addresses, mapping pages to frames.

This question belongs to: Computer Memory and Storage Devices

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