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WBCS Preliminary Examination 2018 — General Studies · Question 120 of 200

Q120
General ScienceComputer Awareness & Technology
USB is which type of storage device?
  1. a.Primary
  2. b.Secondary
  3. c.Tertiary
  4. d.None of the above

Answer: (B) Secondary

Primary memory is the main memory used directly by the CPU (RAM, which is volatile, and ROM). Secondary storage holds data permanently outside the main memory: hard disk, SSD, CD/DVD, memory card and USB pen drive, so a USB drive is a secondary storage device (it uses flash memory). Tertiary storage refers to removable mass storage such as magnetic tape libraries used for archives and backup.

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