Practice question 85 of 180 · medium
A pooled image rollout starts during a normal business day. What two preparations best support safe replacement and recovery if the new app build fails?
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- Ensure the remaining or replacement hosts can carry demand before draining each batch.
- Retain the known-good image version and deployment settings for redeployment.
A safe staged rollout needs tested capacity and a retained known-good image. Protect and assess external data separately from compute rollback. Option explanations: A. Delete the old image as soon as the new build completes.: Build completion is not rollout validation and early deletion removes the rollback source. B. Assume reverting the image will reverse every profile and database migration.: Compute rollback does not automatically undo changes to external data. C. Ensure the remaining or replacement hosts can carry demand before draining each batch.: Capacity headroom prevents the rollout from overloading the hosts still serving users. D. Retain the known-good image version and deployment settings for redeployment.: These provide a concrete compute rollback path. Sources: Windows update management methodologies — https://learn.microsoft.com/en-us/azure/virtual-desktop/windows-update-management-methodologies-session-hosts; Azure Compute Gallery — https://learn.microsoft.com/en-us/azure/virtual-machines/azure-compute-gallery
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