AZ-305 Practice Question 67: Zone Failure VM Recovery
Microsoft Azure Solutions Architect Expert (AZ-305) · Test 7 · question 7 of 10
A stateful application runs on single-instance virtual machines in availability zone 1 of Germany West Central. Data residency rules require that the data stays in that region, so replication to another region is not allowed. The business wants recovery within minutes of losing zone 1, and tolerates an RPO of a few minutes.
Which design meets the requirements?
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Answer:
Site Recovery supports disaster recovery of Azure virtual machines between availability zones in the same region. It replicates continuously to another zone, so failover after the loss of zone 1 brings the machines up in the same region, satisfying the residency rule, with an RPO measured in minutes and a fast failover.
Option A replicates across regions, which is exactly what the residency rules forbid.
Option B makes the front end zone-redundant, but the machines and their state remain in zone 1, so the application is down when the zone fails.
Option C can eventually recover the data in another zone, but a restore takes long, is manual and recovers only to the last backup point, so it misses the recovery time and RPO of minutes.
Reference: Enable Zone-to-Zone Disaster Recovery for Azure VMs