Multiple choice technology architecture

Incremental backup does

  1. Copies all files that are selected for backup

  2. Copies every file on the system that was modified or added since the previous backup, keeping the archive bit switch on

  3. Copies every file on the system that has archive bit switched on, and switch off the archive bit after the backup is complete

  4. Copies all the files that have been generated since the last backup
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Incremental backup copies only files that have been modified since the last backup. It uses the archive bit attribute to identify changed files - when the archive bit is set to on, the file has been modified and needs backing up. After backup completes, the archive bit is switched off to mark that the file has been backed up. This is more efficient than full backups which copy all selected files regardless of changes.

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