Question

when do differential backups typically occur? choose two answers. before a full backup at the same time as a full backup before an incremental backup after a full backup after an incremental backup

Explanation:

To determine when differential backups occur, we analyze backup concepts:

• A differential backup captures changes since the last full backup. Thus, it must occur after a full backup (to have a baseline).
• In backup sequences, differential backups can also occur before an incremental backup (as incremental backups build on previous backups, and differential is a type of backup that can precede incremental in some workflows, or logically, differential is a separate type that can be scheduled before incremental operations).

Other options are incorrect:

• "Before a full backup": Differential needs a full backup as a baseline, so it can’t be before.
• "At the same time as a full backup": Full and differential are distinct operations, not simultaneous.
• "After an incremental backup": Incremental is a different backup type (captures changes since last backup, not just last full), and differential is based on the last full, so it doesn’t follow incremental.

Answer:

C. Before an incremental backup
D. After a full backup