Home » LPI » 117-201 » When you back up only the files that have changed since the last backup, this is called a _______ backup.
When you back up only the files that have changed since the last backup, this is called a _______ backup.
A. Partial
B. Differential
C. Full
D. Copy
Correct Answer: B
Explanation/Reference:
Explanation: When you run a full backup, the files are marked as having been backed up (the archive attribute is cleared). When a file is created or changed, it is marked as ‘not backed up’ (the archive attribute is set). A differential backup backs up any files created or changed since the last full backup (the files marked as ‘not backed up’). It does not mark files as having been backed up (in other words, the archive attribute is not cleared).
Reference: http://www.raid-unix-mac-disk-datarecovery-service.com/diferential_backup.htm
Incorrect Answers
A:A partial backup is not an actual backup type. It is just a description of backing up a few selected files.
C:A full backup backs up all files and marks them as having been backed up by clearing the archive attribute.
D:A copy backup backs up all files but does not mark them as having been backed up.
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