Explanation:
The correct answer is A. Health checks in Google Cloud send HTTP, HTTPS, or TCP requests to instances at predefined intervals. An instance is considered unhealthy if it does not respond or fails to return a 200 OK HTTP status within the check interval. D is incorrect because Google Cloud Health Checks do not utilize pings (ICMP Echo Request and Reply messages) for health status determination. C is incorrect as high CPU usage alone does not classify an instance as unhealthy in the context of health checks. B is also incorrect since health checks assess instance responsiveness to requests, not usage metrics.
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As a Cloud DevOps Engineer, maintaining the health of instances within a Managed Instance Group (MIG) is part of your responsibilities. You've set up a health check for your MIG. How does the health check system identify an instance as unhealthy?
A
The instance is marked unhealthy if it fails to return a 200 OK status within the specified check interval in the health check.
B
The instance is deemed unhealthy if it remains unused for a certain duration.
C
An instance is considered unhealthy when its CPU utilization exceeds 80%.
D
The instance is identified as unhealthy if it does not reply to a ping.