Which of the following storage devices is most suitable for portable data transfer?
A. Hard disk
B. USB flash drive (pen drive)
C. SSD
D. Blu-ray disc
Answer: Option B
Solution (By JKSSB Mock Tests)
USB flash drives are compact, durable, and easy to carry, making them ideal for portable data transfer. They offer good capacity and speed for everyday use.
Which specific optical storage standard uses a shorter wavelength blue-violet laser to read and write data, allowing for significantly higher data density?
Explanation:
Blu-ray discs use a 405nm blue-violet laser, which has a shorter wavelength than the red lasers used in DVDs and CDs, allowing it to focus on smaller pits and pack more data.
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