Which of the following optical formats can be written to only once but read many times?
A. DVD-R
B. BD-RE
C. DVD-RAM
D. CD-RW
Answer: Option A
Solution (By JKSSB Mock Tests)
The '-R' designation in optical formats stands for 'Recordable'. These discs use organic dye that can be altered by a laser only once, preventing rewriting (WORM - Write Once, Read Many).
Explanation:
Magnetic tape is a sequential access medium, meaning data must be read in order. It is used for backup and archival due to high capacity and low cost.
Explanation:
SSDs have much faster random access times because there is no mechanical latency (seek time, rotational latency). They are also more resistant to shock and quieter.
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