An administrator is backing up a database server. The administrator must select a backup method that does not change the archive bit. Which of the following backup techniques should be used to meet…

Question

Options

• AFull
• BIncremental
• CDifferential
• DSelective

• B
  4% (2)
• C
  93% (42)
• D
  2% (1)

Explanation

The archive bit (also called the archive attribute) is a file flag that gets set whenever a file is modified, signaling that it needs to be backed up. Different backup types treat this bit differently: A Full backup backs up all selected files and then CLEARS the archive bit on each file. An Incremental backup backs up only files whose archive bit is set (changed since last backup), then CLEARS the bit. A Differential backup also backs up only files whose archive bit is set, but critically, it does NOT clear the archive bit. This means the same changed files will be picked up again by the next differential backup, making them cumulative. A Selective (copy) backup also doesn't change the archive bit, but Differential is the standard exam answer for a scheduled backup strategy that preserves the archive bit. Since the requirement is to not change the archive bit, Differential is the correct choice.

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