220-802 · Question #921
When running a combination of full and incremental backups, which of the following represents the required tapes in order to completely restore a system?
The correct answer is D. The latest full and all incremental backups since the last full backup. A full backup combined with incremental backups requires the last full backup plus every incremental backup taken since that full backup to achieve a complete restore.
Question
When running a combination of full and incremental backups, which of the following represents the required tapes in order to completely restore a system?
Options
- AThe system cannot be restored completely using full and incremental backups.
- BOnly the latest full backup is required.
- COnly the latest incremental backup is required.
- DThe latest full and all incremental backups since the last full backup.
How the community answered
(38 responses)- A5% (2)
- B11% (4)
- C3% (1)
- D82% (31)
Why each option
A full backup combined with incremental backups requires the last full backup plus every incremental backup taken since that full backup to achieve a complete restore.
Full and incremental backups together do provide a complete restore capability - they are among the most common enterprise backup strategies.
Restoring only the latest full backup recovers data only to the point of that full backup, losing all changes captured in subsequent incremental backups.
Restoring only the latest incremental backup would only contain the most recent changes and would lack the base data from the full backup, resulting in an incomplete restore.
Incremental backups only capture data changed since the most recent backup (full or incremental), so each incremental tape holds a unique, non-overlapping portion of changed data. To fully restore a system, you must first restore the full backup to establish the baseline, then sequentially apply each incremental backup in order to bring the data up to the most recent state.
Concept tested: Full and incremental backup restore sequence
Source: https://learn.microsoft.com/en-us/windows-server/storage/file-server/volume-shadow-copy-service
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