AWS Certified SysOps Administrator – Associate (legacy) — Question 136

A user has configured CloudWatch monitoring on an EBS backed EC2 instance. If the user has not attached any additional device, which of the below mentioned metrics will always show a 0 value?

Answer options

• A. DiskReadBytes
• B. NetworkIn
• C. NetworkOut
• D. CPUUtilization

Correct answer: A

Explanation

The DiskReadBytes metric will show a value of 0 because there are no additional disks attached to the instance for reading data. In contrast, the NetworkIn, NetworkOut, and CPUUtilization metrics can still record activity even without additional devices, as they measure network traffic and CPU activity, which can occur independently.