AWS Certified SysOps Administrator – Associate — Question 381

A company needs to monitor its website’s availability to end users. The company needs a solution to provide an Amazon Simple Notification Service (Amazon SNS) notification if the website's uptime decreases to less than 99%. The monitoring must provide an accurate view of the user experience on the website.

Which solution will meet these requirements?

Answer options

• A. Create an Amazon CloudWatch alarm that is based on the website's logs that are published to a CloudWatch Logs log group. Configure the alarm to publish an SNS notification if the number of HTTP 4xx errors and 5xx errors exceeds a specified threshold.
• B. Create an Amazon CloudWatch alarm that is based on the website's published metrics in CloudWatch. Configure the alarm to publish an SNS notification that is based on anomaly detection.
• C. Create an Amazon CloudWatch Synthetics heartbeat monitoring canary. Associate the canary with the website's URL for end users. Create a CloudWatch alarm for the canary. Configure the alarm to publish an SNS notification if the value of the SuccessPercent metric is less than 99%.
• D. Create an Amazon CloudWatch Synthetics broken link checker monitoring canary. Associate the canary with the website's URL for end users. Create a CloudWatch alarm for the canary. Configure the alarm to publish an SNS notification if the value of the SuccessPercent metric is less than 99%.

Correct answer: C

Explanation

Amazon CloudWatch Synthetics heartbeat canaries are specifically designed to simulate user traffic and verify website availability, making them the best choice to monitor the end-user experience and track uptime via the SuccessPercent metric. A broken link checker canary (Option D) crawls the website to find dead links rather than measuring overall page availability. Options A and B rely on server-side logs and metrics, which do not accurately represent the actual external user experience.