AWS Certified SysOps Administrator – Associate (legacy) — Question 178

A user runs the command `dd if=/dev/zero of=/dev/xvdfbs=1M` on a fresh blank EBS volume attached to a Linux instance. Which of the below mentioned activities is the user performing with the command given above?

Answer options

• A. Creating a file system on the EBS volume
• B. Mounting the device to the instance
• C. Pre warming the EBS volume
• D. Formatting the EBS volume

Correct answer: C

Explanation

The command is used to write data to the EBS volume, which helps in pre-warming it by ensuring that the underlying storage is initialized. This process improves performance by allowing the EBS volume to be ready for use. The other options do not accurately describe the purpose of the command; it does not create a file system, mount the device, or format the volume.