AWS Certified SysOps Administrator – Associate — Question 19

A SysOps administrator is provisioning an Amazon Elastic File System (Amazon EFS) file system to provide shared storage across multiple Amazon EC2 instances. The instances all exist in the same VPC across multiple Availability Zones. There are two instances in each Availability Zone. The SysOps administrator must make the file system accessible to each instance with the lowest possible latency.
Which solution will meet these requirements?

Answer options

• A. Create a mount target for the EFS file system in the VPC. Use the mount target to mount the file system on each of the instances.
• B. Create a mount target for the EFS file system in one Availability Zone of the VPC. Use the mount target to mount the file system on the instances in that Availability Zone. Share the directory with the other instances.
• C. Create a mount target for each instance. Use each mount target to mount the EFS file system on each respective instance.
• D. Create a mount target in each Availability Zone of the VPC. Use the mount target to mount the EFS file system on the instances in the respective Availability Zone.

Correct answer: D

Explanation

Option D is correct because creating a mount target in each Availability Zone allows all EC2 instances to access the EFS with the lowest latency possible. Option A is incorrect as it does not account for latency across Availability Zones. Option B limits access to only one Availability Zone, which does not satisfy the requirement for all instances. Option C is inefficient as it requires a separate mount target for each instance, rather than utilizing shared targets per Availability Zone.