Virtual Machines

Question 1

Under what circumstances is an upgrade of the guest OS supported?

Answer 1

Linux endorsed distributions in the case of a full open source license.

Question 2

What does the Azure Virtual Machine Readiness tool do?

Answer 2

Checks your on-prem environment (both physical and virtual) and provides you with a checklist on moving to the cloud

Question 3

What does the Azure VM Optimization Assessment do?

Answer 3

Asks a few questions, collects some data, and provides some recommendations to optimize your VMs

Question 4

What is the file format for an ARM template?

Answer 4

JSON

Question 5

What do you need to do to use a VHDX image for your Azure VM?

Answer 5

Convert it to VHD and upload it

Question 6

What is the purpose of an Availability Set?

Answer 6

Prevent multiple VMs from being grouped on the same physical hardware, so they’re resilient against downtime.

Question 7

What is the difference between a VM image and an OS image?

Answer 7

A VM image can contain disks - an OS image is just the base OS (no data disks)

Question 8

When preparing a custom image for a VM, what will ensure that the VM will obtain an IP address from the VNet when it starts?

Answer 8

Make sure the VM is configured to pull DNS and IP from DHCP

Question 9

True or False: A dynamic IP address is allocation at the time of VM creation

Answer 9

False - it is allocated when the machine is started

Question 10

The temporary disk on a linux VM is usually what and is mounted as what?

Answer 10

Disk is /dev/sdb and is mounted at /mnt by the Azure Linux Agent

Question 11

Each VM in an availability set is placed into ___ update domain(s) and ___ fault domain(s)

Answer 11

One update and two fault

Question 12

What is an Update Domain for a VM?

Answer 12

A set of VMs (and associated physical hardware) that can be updated / rebooted at the same time

Question 13

How many Update Domains are there by default, and how many can you configure manually?

Answer 13

5, and you can configure up to 20

Question 14

What is a Fault Domain for a VM?

Answer 14

A group of VMs that share common hardware or switches (in other words, a single point of physical failure)

Question 15

What is necessary on a VM in order for the Azure backup extension to work?

Answer 15

The Azure VM Agent.

Question 16

Why would you choose not to use the default redundancy option for Azure VM backup?

Answer 16

The default is geo-redundant, and you would choose locally redundant if you wanted to save on cost (and the backup is not your primary backup)

Question 17

What infrastructure component do you use to store a backup of an Azure VM?

Answer 17

Recovery Services Vault

Question 18

When moving a VM (to another resource group, for instance), what is the primary difference between using the portal and using powershell?

Answer 18

The portal will find all of the related objects that need to move for you. Powershell requires you to specify them.