Which technology is used in Blu-ray discs to achieve higher capacity? MCQ with Answer and Explanation

Question
Which technology is used in Blu-ray discs to achieve higher capacity?
A. Red laser
B. Infrared laser
C. Ultraviolet laser
D. Blue-violet laser
Answer: Option D
Solution (By JKSSB Mock Tests)
Blu-ray discs use a blue-violet laser with a shorter wavelength (405 nm) than the red laser used in DVDs (650 nm), allowing smaller pits and more data per area.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
What is the function of the 'read' operation in memory?
A. To retrieve data from a memory location
B. To clear a memory location
C. To store data to a memory location
D. To move data between registers
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Correct Answer: Option A

Explanation:
A read operation fetches data from a specified memory address and transfers it to the CPU or another component.
This question belongs to: Computer Memory and Storage Devices
Question #2
What does the term 'form factor' refer to when talking about SSDs?
A. The type of NAND flash
B. The storage capacity
C. The data transfer speed
D. The physical size and shape
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Correct Answer: Option D

Explanation:
Form factor describes the physical dimensions and connector type of the SSD, such as 2.5-inch, M.2, or PCIe add-in card, determining compatibility with the system.
This question belongs to: Computer Memory and Storage Devices
Question #3
What does the acronym PROM stand for?
A. Primary Read-Only Memory
B. Permanent Read-Only Memory
C. Programmable Read-Only Memory
D. Parallel Read-Only Memory
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Correct Answer: Option C

Explanation:
PROM stands for Programmable Read-Only Memory, which can be programmed once after manufacturing using a special device.
This question belongs to: Computer Memory and Storage Devices
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