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Exam AWS Certified DevOps Engineer - Professional DOP-C02 topic 1 question 288 discussion

Exam question from Amazon's AWS Certified DevOps Engineer - Professional DOP-C02
Question #: 288
Topic #: 1
[All AWS Certified DevOps Engineer - Professional DOP-C02 Questions]

A DevOps team manages infrastructure for an application. The application uses long-running processes to process items from an Amazon Simple Queue Service (Amazon SQS) queue. The application is deployed to an Auto Scaling group.

The application recently experienced an issue where items were taking significantly longer to process. The queue exceeded the expected size, which prevented various business processes from functioning properly. The application records all logs to a third-party tool.

The team is currently subscribed to an Amazon Simple Notification Service (Amazon SNS) topic that the team uses for alerts. The team needs to be alerted if the queue exceeds the expected size.

Which solution will meet these requirements with the MOST operational efficiency?

  • A. Create an Amazon CloudWatch metric alarm with a period of 1 hour and a static threshold to alarm if the average of the ApproximateNumberOfMessagesDelayed metric is greater than the expected value. Configure the alarm to notify the SNS topic.
  • B. Create an Amazon CloudWatch metric alarm with a period of 1 hour and a static threshold to alarm if the sum of the ApproximateNumberOfMessagesVisible metric is greater than the expected value. Configure the alarm to notify the SNS topic.
  • C. Create an AWS Lambda function that retrieves the ApproximateNumberOfMessages SQS queue attribute value and publishes the value as a new CloudWatch custom metric. Create an Amazon EventBridge rule that is scheduled to run every 5 minutes and that invokes the Lambda function. Configure a CloudWatch metrics alarm with a period of 1 hour and a static threshold to alarm if the sum of the new custom metric is greater than the expected value.
  • D. Create an AWS Lambda function that checks the ApproximateNumberOfMessagesDelayed SQS queue attribute and compares the value to a defined expected size in the function. Create an Amazon EventBridge rule that is scheduled to run every 5 minutes and that invokes the Lambda function. When the ApproximateNumberOfMessagesDelayed SQS queue attribute exceeds the expected size, send a notification the SNS topic.
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Suggested Answer: B 🗳️
by teo2157 at Dec. 16, 2024, 12:02 p.m.
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CHRIS12722222
4 months ago
Selected Answer: B
ApproximateNumberOfMessagesVisible, which provides the number of messages available for retrieval from the queue. This is the primary metric that reflects how many messages are waiting to be processed.
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teo2157
4 months, 2 weeks ago
Selected Answer: B
Between CloudWatch alarms and Lambda functios is more operational the CloudWatch alarms. The key point here is that ApproximateNumberOfMessagesVisible corresponds to The number of messages to be processed while ApproximateNumberOfMessagesDelayed is the number of messages in the queue that are delayed and not available for reading immediately. Based on that it's B.
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