AZ-104 Question 132
Select 3Your development team needs to quickly deploy and tear down multiple Windows Server 2019 virtual machines in Azure for short-lived development tasks. They require ephemeral OS disks so that no persistent storage remains after the VMs are stopped or deleted. Which statements about ephemeral OS disks are correct in this scenario?
- A
Ephemeral OS disks are stored on the local host and do not incur storage costs in Azure Storage.
- B
Ephemeral OS disks can only be created with specialized images, not marketplace images.
- C
Ephemeral OS disks are only supported on VM sizes that provide temporary local storage.
- D
Ephemeral OS disks are not supported by the Azure Backup service.
Show answer and explanation
Correct answers: A, C, D
Explanation
Ephemeral OS disks are ideal for scenarios where no persistent storage is required and faster provisioning and deletion processes are desired. By using local ephemeral storage on qualifying VM sizes, these disks do not incur storage costs and are not supported by Azure Backup, as the data is lost when the VM is deallocated.
- A. Correct.
Ephemeral OS disks are indeed stored locally on the VM host’s ephemeral storage, which eliminates additional Azure Storage charges.
- B. Incorrect.
Ephemeral OS disks can be created from both marketplace images and custom images, making this statement incorrect.
- C. Correct.
Azure ephemeral OS disks rely on the VM’s temporary local storage. Only VM sizes offering such local storage can host ephemeral OS disks.
- D. Correct.
Ephemeral OS disks cannot be backed up with Azure Backup because their data is not persisted in Azure Storage.