LESSON 4
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
ITEM
CORRECT ANSWER AND FEEDBACK
1.
Magnetic (Disks) and optical/magneto-optical (CDs)(pages 4-1 and 4-2).
2.
Ordinary contaminants (page 4-2).
3.
Make a backup copy (page 4-4).
IT0772
4-8
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