You are chairing a team meeting where you need to talk about the Ephemeral OS Disks with your team members. Which of the following statement(s) can you use to rightly describe the Ephemeral OS Disks? (Select all that are applicable)

Answer options:

A.Ephemeral OS disks are the disks that are built on the local VM(Virtual Machine) storage
B.Ephemeral disks are not good for stateless apps.
C.Ephemeral OS disk results in having higher write/read latency to the disk
D.Ephemeral disks are available in all Azure regions
E.All the above

Correct Answer: A and D 
Ephemeral OS disks are the disks that are built on the local VM (Virtual Machine) storage. These disks help you in getting lower write/read latency to the disk and quicker VM reimage. 
The main characteristics of Ephemeral OS disks are: Good for stateless apps.
Supported by custom images, Marketplace, and Shared Image Gallery.
Allows faster resetting or reimaging VMs and scaling set instances to actual boot state.
Lower read/write latency
Availability in all Azure regions.
Option A is correct. Ephemeral disks are the disks that are built on the local VM(Virtual Machine) storage.
Option B is incorrect. Ephemeral disks are considered good for stateless applications.
Option C is incorrect. Ephemeral disk results in lower write/read latency.
Option D is correct. One of the key features of Ephemeral disks is their availability in all Azure regions.
Option E is incorrect. All of the given statements are false, only options A and D are correct.
Reference: To know more about Ephemeral OS disks for Azure VMs, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-machines/ephemeral-os-disks