Google Cloud Associate Cloud Engineer — Question 201

You are migrating a business critical application from your local data center into Google Cloud. As part of your high-availability strategy, you want to ensure that any data used by the application will be immediately available if a zonal failure occurs. What should you do?

Answer options

• A. Store the application data on a zonal persistent disk. Create a snapshot schedule for the disk. If an outage occurs, create a new disk from the most recent snapshot and attach it to a new VM in another zone.
• B. Store the application data on a zonal persistent disk. If an outage occurs, create an instance in another zone with this disk attached.
• C. Store the application data on a regional persistent disk. Create a snapshot schedule for the disk. If an outage occurs, create a new disk from the most recent snapshot and attach it to a new VM in another zone.
• D. Store the application data on a regional persistent disk. If an outage occurs, create an instance in another zone with this disk attached.

Correct answer: D

Explanation

The correct answer is D because a regional persistent disk replicates data across multiple zones, ensuring high availability and immediate access in the event of a zonal failure. Options A and B utilize zonal persistent disks, which do not provide the needed redundancy. Option C, while using a regional disk, incorrectly suggests creating a disk from a snapshot, which introduces unnecessary delays and does not guarantee immediate availability.