1. It is double-sided disk
  2. It is double density disk
  3. It has double the number of tracks per inch
  4. All of the above
  5. None of the above
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1 Answers

Answer: Option 4

Quad-density (QD) : A quad density disk is a 5¼" floppy disk with a storage capacity of 720 kilobytes. Quad density floppy disks are often double sided. During their time, quad density floppy disks are not as common as double-sided, double-density floppy disks.

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