UGC NET CSE | December 2010 | Part 2 | Question: 19

Question

Optical storage is a

• A. High-speed direct access storage device.
• B. Low-speed direct access storage device.
• C. Medium-speed direct access storage device.
• D. High-speed sequential access storage device.

Answer 1

Answer: B

Optical storage is direct access storage. As per the standards of high speed devices available in 2016, optical storage are slow and almost obsolete.

Answer 2

Ans:-B

Explanation:-

Actually the same question is available in the book "Database systems:Concepts, Design and application" by S.K.Singh. There are lot of questions at the end of every chapter in that book. According to the book, since the head assembly is heavier, DVD and CD drives have much longer seek time as compared to magnetic-disk drives. Rotational speeds of DVD and CD drives are lower than that of magnetic disk drives. So the answer for the above question is B which is optical storage is a low speed direct access storage device.