You have an Azure subscription that contains a virtual machine named VM1. VM1 hosts a line-of-business application that is available 24 hours a day. VM1 has one network interface and one managed disk. VM1 uses the D4s v3 size.
You plan to make the following changes to VM1:
-> Change the size to D8s v3.
-> Add a 500-GB managed disk.
-> Add the Puppet Agent extension.
-> Enable Desired State Configuration Management.
Which change will cause downtime for VM1?
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A. B. C. D.C
While resizing the VM it must be in a stopped state.
https://azure.microsoft.com/en-us/blog/resize-virtual-machines/Out of the four changes listed, only one of them has the potential to cause downtime for VM1. The change that can cause downtime is changing the size of the VM to D8s v3.
Here is an explanation of each change and its potential impact:
A. Enable Desired State Configuration Management: Enabling Desired State Configuration (DSC) Management will not cause downtime for the VM. DSC is a platform feature in Azure that allows you to manage the configuration of VMs, and it can be enabled without causing downtime.
B. Add a 500-GB managed disk: Adding a managed disk to the VM will not cause downtime, as you can add a disk to a running VM without any impact on its availability.
C. Change the size to D8s v3: Changing the size of the VM to D8s v3 has the potential to cause downtime, as it requires the VM to be deallocated and restarted on the new hardware. During this time, the line-of-business application will not be available. It's important to plan for this downtime and schedule it at a time when it will have the least impact on your users.
D. Add the Puppet Agent extension: Adding the Puppet Agent extension will not cause downtime for the VM. The Puppet Agent is an open-source configuration management tool that can be used to manage the configuration of VMs. Like DSC, it can be enabled without causing downtime.
In summary, the change that has the potential to cause downtime for VM1 is changing the size of the VM to D8s v3. The other changes can be made without any impact on the availability of the line-of-business application.