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Exam AWS Certified DevOps Engineer - Professional DOP-C02 topic 1 question 359 discussion

Exam question from Amazon's AWS Certified DevOps Engineer - Professional DOP-C02
Question #: 359
Topic #: 1
[All AWS Certified DevOps Engineer - Professional DOP-C02 Questions]

A company runs applications on Amazon EC2 instances that are in an Amazon EC2 Auto Scaling group. The EC2 instances are behind an Application Load Balancer (ALB). Users recently began to experience errors when traffic was directed to some of the EC2 instances.

A DevOps engineer discovers that the Auto Scaling group reports the problematic instances are healthy despite the application errors. User experience returns to normal after the DevOps engineer resolves the application errors on the problematic instances.

The company wants to ensure that traffic is routed only to healthy instances that are not experiencing application errors. The company also wants a support team to receive a notification if the traffic routing configuration changes.

Which solution will meet these requirements?

  • A. Configure the Auto Scaling group to use ELB health checks. Enable AWS Config. Create an AWS Config rule to ensure that any new Auto Scaling group will use ELB health checks. Create an Amazon Simple Notification Service (Amazon SNS) topic to notify the support team if the traffic routing configuration changes. Configure the AWS Config rule to send a notification to the topic.
  • B. Configure the Auto Scaling group to use EC2 health checks. Enable AWS Config. Create an AWS Config rule to ensure that any new Auto Scaling group will use EC2 health checks. Create an Amazon Simple Notification Service (Amazon SNS) topic to notify the support team if the traffic routing configuration changes. Configure the AWS Config rule to send a notification to the topic.
  • C. Configure the Auto Scaling group to use EC2 health checks. Create an Amazon CloudWatch synthetic canary to monitor the application. Create a CloudWatch alarm that is triggered when the CloudWatch canary fails. Configure the alarm to notify the support team when the alarm state is in alarm.
  • D. Configure the Auto Scaling group to use ELB health checks. Create an Amazon CloudWatch synthetic canary to monitor the application. Create a CloudWatch alarm that is triggered when the CloudWatch canary fails. Configure the alarm to notify the support team when the alarm state is in alarm.
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Suggested Answer: A 🗳️
by GripZA at April 23, 2025, 6:43 a.m.
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GripZA
2 days, 17 hours ago
Selected Answer: A
use ALB as health check type in ASG settings, not EC2, for application errors. While CloudWatch synthetic canaries can monitor application endpoints, they do not prevent traffic from being routed to unhealthy instances. So config over synthetic canary here.
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