Which of the following storage media from the list are optical storage media only?
1.DVD-RAM
2.Pen drive
3.Magnetic tape
4.SSD
5.Blu-ray disc
A2, 3 & 4 only
B1 & 2 only
C4 & 5 only
D1 & 5 only ✓ Correct
Correct answer: (D) 1 & 5 only
Explanation
The optical storage media here are Statement 1 the DVD-RAM and Statement 5 the Blu-ray disc, both of which are read and written by a laser.
Statement 2 the pen drive uses flash memory, an electronic solid-state store, not an optical one.
Statement 3 the magnetic tape stores data as magnetised patterns on a tape, a magnetic medium.
Statement 4 the SSD is a solid-state drive built from flash memory chips, again not optical.
Optical discs record data as tiny pits and lands read by a laser beam.
Blu-ray uses a shorter blue laser than the DVD, so it packs far more data on the same size disc.
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