Which backup type saves only data that has changed since the last backup of any type?

Which backup type saves only data that has changed since the last backup of any type?

• A. Full Backup
• B. Differential Backup
• C. Incremental Backup
• D. Version Control

Answer: (C)

Incremental backups save only data that has changed since the last backup of any type. After the initial full backup, each new backup captures just the new or modified data since the previous backup (whether that previous backup was full or incremental). This makes incremental backups quick and storage-efficient because unchanged data isn’t recopied. For restores, you need the original full backup plus every incremental backup in order to reconstruct the entire dataset. In contrast, differential backups copy changes since the last full backup, so their size grows until the next full backup. Version control tracks changes to individual files over time rather than serving as a full-system backup strategy.

Incremental backups save only data that has changed since the last backup of any type. After the initial full backup, each new backup captures just the new or modified data since the previous backup (whether that previous backup was full or incremental). This makes incremental backups quick and storage-efficient because unchanged data isn’t recopied. For restores, you need the original full backup plus every incremental backup in order to reconstruct the entire dataset. In contrast, differential backups copy changes since the last full backup, so their size grows until the next full backup. Version control tracks changes to individual files over time rather than serving as a full-system backup strategy.