AZ-305 Practice Question 57: Fault Injection Zone Outage
Microsoft Azure Solutions Architect Expert (AZ-305) · Test 6 · question 7 of 10
Before go-live, an architect wants evidence that a zone-redundant application keeps working when an availability zone goes down and when a dependency responds slowly. The tests must run in a pre-production environment, in a controlled and repeatable way, by injecting real faults into the deployed resources.
Which Azure service should you use?
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Answer:
Azure Chaos Studio is the managed service for chaos engineering and resilience testing. It runs controlled experiments that inject faults, such as a zone-down scenario or added latency, into Azure resources, with permissions that limit what each experiment may affect. That is what the scenario asks for: repeatable fault injection against the real deployment before launch.
Option A tests performance under load. Azure Load Testing shows how the app scales, but it does not take a zone offline or slow a dependency.
Option B gives static advice on how to configure resources for reliability. It cannot prove how the running workload behaves during a failure.
Option C notifies you when Microsoft detects a real service issue. It is reactive and gives you no way to trigger a test outage.
Reference: What is Azure Chaos Studio?