A customer's computer stores accounting and sales data that is backed up according to the following schedule:
Full backup Sunday night Differential backup Monday-Friday nights
The hard disk fails on Thursday morning.
What must you do to restore the data in the least amount of time?
1. Restore the Sunday backup. Restore the Monday backup. Restore the Tuesday backup. Restore the Wednesday backup.
2. Restore the Wednesday backup.
3. >>Restore the Sunday backup. Restore the Wednesday backup.
4. Restore the Sunday backup.
Explanation : You should restore the Sunday backup, then the Wednesday backup. A differential backup backs up all data that has changed since the last full backup. Therefore, you only need to restore the last full backup and the most recent differential backup.
You cannot restore the data using only the Sunday backup. If you only restore the Sunday backup, all data changed since the Sunday night will be lost.
You cannot restore the data using only the Wednesday backup. You must restore the full backup before you can restore the differential backup.
You do not need to restore the Sunday, Monday, Tuesday, and Wednesday backups. If the weekday backups were incremental backups, you would need to take these steps. However, since they are differential backups, they include all data changed since the last full backup.
