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A magneto-optic disk is :

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A magneto-optic disk is :

(a) primary storage

(b) secondary storage

(c) tertiary storage

(d) none of the mentioned

This question was posed to me at a job interview.

Question is taken from Tertiary Storage in chapter Storage and File Structures of Database Management

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Right option is (c) tertiary storage

The best explanation: Tertiary storage involves a robotic mechanism which will mount (insert) and dismount removable mass storage media into a storage device according to the system’s demands; this data is often copied to secondary storage before use.

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