If a recently installed update prevents standard operation, performing this action to return to the previous state is known as a?

• A. Migration
• B. Reimage
• C. Scale-out
• D. Rollback

Answer: (D)

Restoring the system to its prior working state after an update is a rollback. It means undoing the changes introduced by the recent update and returning the system to how it operated before that update was applied. In cloud and IT practice, this often uses a saved snapshot, backup, or versioned image to revert to the previous configuration.

Why the others don’t fit: migration means moving data or workloads to another environment; reimage would reinstall the OS from a new image, starting fresh rather than undoing a specific update; scale-out involves adding more resources to handle load, not undoing changes.