Resilience test for authentication layer (regional managed instance group serving a public REST API backed by Cloud SQL). Which action should you take?
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Correct answer: Run a disaster simulation that shuts down all VMs in a zone to observe application behavior..
Why this is the answer
The question asks for a resilience test for the authentication layer. Shutting down all VMs in a zone simulates a zonal outage, directly testing how the regional managed instance group (MIG) handles failures and maintains authentication service availability. This directly assesses resilience. Engaging a security firm for web scraping tests for data breaches, not the resilience of the authentication service itself. Deploying intrusion detection is a security measure for detecting attacks, not a test of the system's ability to recover from failures. Creating a Cloud SQL read replica and triggering failover tests database resilience, but the question specifically targets the authentication layer, which is primarily handled by the MIG in this scenario.
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