Virtual Machines

Question 1

What is IaaS, PaaS, Saas?

Answer 1

• Infrastructure as a Service (Most flexible, can also handle SaaS or PaaS)
• Platform as a Service (Lowe Level of SaaS, EG. Google Apps Engine)
• Software as a Service (Google Apps, SalesForce)

Question 2

Why do you need to deallocate your VM if the testing is complete?

Answer 2

If you shut it down and don’t deallocate your VM, you still incur the charge as you are reserving hardware resources.

Question 3

Does deleting the VM delete the managed disk?

Answer 3

No

Question 4

If RDP, PowerShell doesn’t connect, what should you look at?

Answer 4

1. Azure Network Security Group (NSG) under ACL, check the ports are set to ‘Allow’:
   a. ports 3389 (RDP)
   b. Public Port 80 (HTTP)
   c. Private Port 5986 (PowerShell Remoting)

Question 5

What is VNET Peering?

Answer 5

Virtual network peering enables you to seamlessly connect two Azure virtual networks. Once peered, the virtual networks appear as one, for connectivity purposes. (Runs via Microsoft Backbone)

Question 6

Why use VNet-to-VNet?

Answer 6

If you have multiple subscriptions and/or VMs are placed in different regions, this method allows you to build a virtual network.

Question 7

What options are available for building VM Images?

Answer 7

1. You can build your VM Image on-prem and upload it
2. You can use a template on Azure.
3. Build a custom one on Azure.

Question 8

What options do you have for VM elasticity?

Answer 8

1. Scale your VM vertically (increase/decrease compute power).
2. Scale your VM horizontally (deploy multiple clones of the same VM to deal with workload size).

Question 9

What is an Ephemeral disk?

Answer 9

Secondary temporary disk (D Drive), it should not be used for data. It holds Paging File or Swap File.

Question 10

What does IOPS stand for?

Answer 10

Input/Output operations per seconds. Higher the number, the better the performance.

Question 11

Can you attach, detach and move NIC to different Virtual machines?

Answer 11

Yes

Note: This will be required on a virtual network along with subnet setup.

Question 12

Are DNS automatically taken care of by Azure DNS?

Answer 12

Yes

Note: You can assign additional internal or external DNS server addresses in the virtual network.

Question 13

What is to use PowerShell in Azure?

Answer 13

shell.azure.com

Question 14

Inside PowerShell in Azure, how do you check?

Answer 14

Get-CloudDrive

Question 15

What is Azure CLi V2.0

Answer 15

Python Application.

Note to install: Install Python, Package manager to Azure CLi and then SSH Keygen

Question 16

What is the URL for Azure Poral?

Answer 16

portal.azure.com

Question 17

What are the 3 methods to control Azure?

Answer 17

Azure Portal
PowerShell
CLi 2.0

Question 18

Does Azure allow access to its portal at granular level access control?

Answer 18

Yes

Question 19

What does NSG stand for?

Answer 19

Network Security Group