Which backup type backs up all data with no omissions?

Which backup type backs up all data with no omissions?

• A. Full backup
• B. Incremental backup
• C. Differential backup
• D. Mirror backup

Answer: (A)

The idea being tested is that only a full backup copies every file and folder in the chosen data set in one operation, yielding a complete, self-contained backup with no gaps. Because it captures everything at that moment, you can restore the entire dataset from that single backup without needing any earlier or additional backups. Incremental backups, by contrast, only copy what has changed since the last backup, so over time some data isn’t included in a given backup and must be gathered from earlier backups. Differential backups capture all changes since the last full backup, so they’re more comprehensive than incremental backups but still rely on the last full backup to restore everything. Mirror backups create an exact clone of the source data, which also includes all data at the time but are typically treated differently from the standard backup types described here. So, the backup type that backs up all data with no omissions is a full backup.

The idea being tested is that only a full backup copies every file and folder in the chosen data set in one operation, yielding a complete, self-contained backup with no gaps. Because it captures everything at that moment, you can restore the entire dataset from that single backup without needing any earlier or additional backups.

Incremental backups, by contrast, only copy what has changed since the last backup, so over time some data isn’t included in a given backup and must be gathered from earlier backups. Differential backups capture all changes since the last full backup, so they’re more comprehensive than incremental backups but still rely on the last full backup to restore everything. Mirror backups create an exact clone of the source data, which also includes all data at the time but are typically treated differently from the standard backup types described here.

So, the backup type that backs up all data with no omissions is a full backup.