[Solved] Given this CloudWatch alarm snippet:{"AlarmName": "ScaleUpCPU", "MetricName": "CPUUtilization", "Threshold": 70, "ComparisonOperator": "GreaterThanThreshold", "AlarmActions":... | AWS

AWS - CloudWatch

Given this CloudWatch alarm snippet:

{"AlarmName": "ScaleUpCPU", "MetricName": "CPUUtilization", "Threshold": 70, "ComparisonOperator": "GreaterThanThreshold", "AlarmActions": ["arn:aws:autoscaling:region:123456789012:scalingPolicy:policy-id:autoScalingGroupName/group-name:policyName/policy-name"]}

What happens when CPU utilization exceeds 70%?

AThe alarm deletes the Auto Scaling group.

BThe Auto Scaling policy is triggered to increase instances.

CThe alarm sends an email notification only.

DNothing happens because the threshold is too high.

Step-by-Step Solution

Solution:

Step 1: Analyze alarm configuration
The alarm triggers when CPUUtilization is greater than 70% and calls the Auto Scaling policy ARN in AlarmActions.
Step 2: Understand effect of triggering Auto Scaling policy
The Auto Scaling policy will increase the number of instances in the group to handle load.
Final Answer:
The Auto Scaling policy is triggered to increase instances. -> Option B
Quick Check:
Alarm triggers scaling policy = scale up [OK]

Quick Trick: AlarmActions with scaling policy ARN triggers scaling [OK]

Common Mistakes:

Assuming alarm only sends email without scaling
Thinking alarm deletes resources
Ignoring threshold effect

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Given this CloudWatch alarm snippet:

Step 1: Analyze alarm configuration

Step 2: Understand effect of triggering Auto Scaling policy

Final Answer:

Quick Check:

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