CGRC · Question #222
An incremental backup captures files that were created or changed since the last backup, regardless of backup type. Incremental backups afford more efficient use of storage media, and backup times…
The correct answer is A. Incremental (Backup). The provided text describes an incremental backup, which captures only data that has changed since the last backup of any type, reducing storage and backup time. However, it requires multiple backup sets for a full restoration.
Question
An incremental backup captures files that were created or changed since the last backup, regardless of backup type. Incremental backups afford more efficient use of storage media, and backup times are reduced. However, to recover a system from an incremental backup, media from different backup operations may be required. For example, consider a case in which a directory needed to be recovered. If the last full backup was performed three days prior and one file changed each day, then the media for the full backup and each day's incremental backups would be needed to restore the entire directory. Response:
Options
- AIncremental (Backup)
- BFull (Backup)
- CDifferential (Backup)
- DData (Backup)
How the community answered
(25 responses)- A88% (22)
- B4% (1)
- C8% (2)
Why each option
The provided text describes an incremental backup, which captures only data that has changed since the last backup of any type, reducing storage and backup time. However, it requires multiple backup sets for a full restoration.
Incremental backups specifically record only those files that have been created or changed since the last full or incremental backup, aligning perfectly with the description of capturing changes since the 'last backup, regardless of backup type' and requiring multiple media for restoration.
A full backup copies all selected data, regardless of its previous backup status, not just files changed since the last backup.
A differential backup captures all changes since the last full backup, not since the last backup of any type, meaning it accumulates changes over time and only requires the last full and the latest differential for restoration.
"Data backup" is a general term and does not specify a particular backup strategy like incremental, full, or differential.
Concept tested: Incremental backup definition
Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-server-backup/backup-overview#backup-types
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