Which of the following is a characteristic of a DVD? MCQ with Answer and Explanation

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Which of the following is a characteristic of a DVD?

A. It is primarily used for backup

B. It has a storage capacity of up to 4.7 GB for single layer

C. It uses a blue-violet laser

D. It is a magnetic storage medium

Answer: Option B

Solution (By JKSSB Mock Tests)

DVD single-layer capacity is 4.7 GB. Blu-ray uses blue-violet laser. DVD is optical, not magnetic.

This question belongs to: Computer Memory and Storage Devices

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Question #1

Which of the following is a type of memory that is used for storing digital photos in a camera?

A. SD card

B. ROM

C. RAM

D. Hard disk

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Correct Answer: Option A

Explanation:
Digital cameras typically use SD cards or other flash memory cards for photo storage.

This question belongs to: Computer Memory and Storage Devices

Question #2

Which of the following is a type of memory that has the fastest access time?

A. Hard disk

B. Cache memory

C. RAM

D. Registers

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Correct Answer: Option D

Explanation:
Registers have the fastest access time because they are inside the CPU, typically accessed in a single clock cycle.

This question belongs to: Computer Memory and Storage Devices

Question #3

What does 'DDR' stand for in DDR RAM?

A. Digital Data Register

B. Dynamic Data Refresh

C. Double Data Rate

D. Dual Data Routing

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Correct Answer: Option C

Explanation:
DDR stands for Double Data Rate, meaning the memory transfers data on both the rising and falling edges of the clock signal, effectively doubling the data rate.

This question belongs to: Computer Memory and Storage Devices

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