SSCP · Question #445
Which backup method is used if backup time is critical and tape space is at an extreme premium?
The correct answer is A. Incremental backup method. The incremental backup copies only the files that have changed since the last backup of any type (full or incremental) and then clears the archive bit on those files. Because each incremental session captures only the day's changes rather than all changes since the last full…
Question
Which backup method is used if backup time is critical and tape space is at an extreme premium?
Options
- AIncremental backup method.
- BDifferential backup method.
- CFull backup method.
- DTape backup method.
How the community answered
(43 responses)- A88% (38)
- B2% (1)
- C2% (1)
- D7% (3)
Explanation
The incremental backup copies only the files that have changed since the last backup of any type (full or incremental) and then clears the archive bit on those files. Because each incremental session captures only the day's changes rather than all changes since the last full, it produces the smallest individual backup sets and runs the fastest. The trade-off is a more complex restore: you need the last full backup plus every incremental tape in sequence.
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