Practice Test 1 | Google Cloud Certified Professional Cloud Architect | Dumps | Mock Test
Over time, you’ve created 5 snapshots of a single instance. To save space, you delete snapshots number 3 and 4. What has happened to the fifth snapshot?
A. The data from both snapshots 3 and 4 necessary for continuance are transferred to snapshot 5.
B. It is no longer useable and cannot restore data.
C. All later snapshots, including 5, are automatically deleted as well.
D. The data from snapshot 4 necessary for continuance was transferred to snapshot 5, however snapshot 3’s contents were transferred to snapshot 2.
Correct Answer A
Explanation
Deleting a snapshot: https://cloud.google.com/compute/docs/disks/restore-and-delete-snapshots
When you delete a snapshot, Compute Engine immediately marks the snapshot as DELETED in the system. If the snapshot has no dependent snapshots, it is deleted outright. However, if the snapshot does have dependent snapshots:
1) Any data that is required for restoring other snapshots is moved into the next snapshot, increasing its size.
2) Any data that is not required for restoring other snapshots is deleted. This lowers the total size of all your snapshots.
3) The next snapshot no longer references the snapshot marked for deletion, and instead references the snapshot before it.
Because subsequent snapshots might require information stored in a previous snapshot, keep in mind that deleting a snapshot does not necessarily delete all the data on the snapshot. As mentioned in the first bullet above, if any data on a snapshot that is marked for deletion is needed for restoring subsequent snapshots, that data is moved into the next corresponding snapshot. To definitively delete data from your snapshots, you should delete all snapshots.
The diagram below illustrates the process described above:
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