Consider a Managed Instance Group spread across two zones with health checks enabled. If one zone fails completely, what happens to the instances?

medium📝 service behavior Q13 of 15

GCP - Cloud SQL and Databases

AInstances in the failed zone are replaced in the same zone

BInstances in the failed zone remain down until manual restart

CInstances in the failed zone are replaced in the other zone

DAll instances in both zones are shut down

Step-by-Step Solution

Solution:

Step 1: Understand multi-zone MIG behavior
MIGs spread instances across zones for fault tolerance.
Step 2: Analyze failure impact
If one zone fails, MIG recreates instances in healthy zones to maintain capacity.
Final Answer:
Instances in the failed zone are replaced in the other zone -> Option C
Quick Check:
Zone failure triggers instance replacement in healthy zones [OK]

Quick Trick: MIGs replace failed zone instances in other zones automatically [OK]

Common Mistakes:

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