Section 17.7
Review Questions
CD-ROMS
  1. What does the name CD-ROM stand for?
answer...
Compact Disk Read Only Memory
  1. How is data stored on a CD-ROM?
answer...
it is stored as a pattern of 1s and 0s by burning tiny hole or pits into the surface of the plastic using a laser
  1. Is data stored on a CD-ROM in tracks as on a magnetic disk drive?
answer...
No. It is stored in a continuous spiral starting from the center.
  1. How are CD-ROMs protected against damage, since they can't be rewritten or fixed?
answer...
they have extra error correcting codes on them
  1. Which kind of scratch is most likely to cause data to be lost? Circle one: 
               radial                 angular
answer...
angular
  1. Since some CD-ROMs can have their contents changed, they can be used almost like magnetic disks to implement non-volatile memory. Why are magnetic disks likely to remain the the primary storage technology?
answer...
because CD-ROMs are still much slower than magnetic disks
  1. What are some other magnetic disks that are challenging the traditional 3.25 inch floppy?
answer...
ZIP disks and Jazz disks, which have much larger storage capacities
  1. How much can a ZIP disk hold?
answer...
100 MB, which is about 70 times a single floppy (about 1.5 MB)