AWS Certified SysOps Administrator – Associate (legacy) — Question 350

A user has configured an ELB to distribute the traffic among multiple instances. The user instances are facing some issues due to the back-end servers. Which of the below mentioned CloudWatch metrics helps the user understand the issue with the instances?

Answer options

• A. HTTPCode_Backend_3XX
• B. HTTPCode_Backend_4XX
• C. HTTPCode_Backend_2XX
• D. HTTPCode_Backend_5XX

Correct answer: D

Explanation

The HTTPCode_Backend_5XX CloudWatch metric measures the count of HTTP 5XX server error codes returned by the registered back-end instances. Because 5XX errors signify server-side failures, this metric is the key indicator of issues within the back-end instances themselves. In contrast, 2XX represents success, 3XX represents redirection, and 4XX represents client-side errors.