AZ-900

Question 1

What are some of the key advantages of using ARM templates for creating cloud infrastructure?

Answer 1

Idempotency, Declarative, Source Control

Question 2

Define Declarative for ARM templates.

Answer 2

You only say “what” you want to create, not “how”. Azure takes care of the “how”.

Question 3

Define Source Control for ARM templates

Answer 3

Use source control to track changes to the ARM template over time. This can identify any issues that come from changes to the template.

Question 4

Why would you use the Azure Cloud Shell instead of the Azure CLI or PowerShell?

Answer 4

Cloud Shell can be used entirely in a web browser and used across multiple devices

The Cloud Shell is 100% browser-based and provides a complete environment for either the Azure CLI or PowerShell.

Question 5

What are some of the limitations with a free Azure account?

Answer 5

Azure free account is meant to evaluate Azure services; not to use for production

Azure credits expire after 30 days and free services expire after 12 months

Question 6

What is a good reason to use the Azure CLI?

Answer 6

It rarely changes, and the commands stay the same for the most part.

The Azure CLI is all text based, thus there is no user interface to change. This means that the commands and procedures stay very static in the tool. You can use all products and services with the CLI.

Question 7

Which Azure products and services are available through the Azure Portal?

Answer 7

All products and services are generally available through the Azure portal with any type of subscription.

Question 8

What does fault tolerance describe for cloud computing?

Answer 8

Ensure services and applications remain available in the event of a failure

Fault tolerance means that a failure can occur on Azure services and applications, but it will not affect its availability.

Question 9

What is consumption-based pricing on Azure?

Answer 9

Consumption-based pricing is when you are charged for only what you use (Pay-As-You-Go rate).

Question 10

Why is cloud agility important for businesses?

Answer 10

To enable the ability to rapidly develop, test and launch software applications that drive business growth.

Question 11

What is high availability in cloud computing?

Answer 11

If one resource on Azure dies unexpectedly, another resource will almost instantly take over the workload.

It ensures that backup resources are ready to take over any workload

Question 12

Which cloud ability does elasticity describe?

Answer 12

The ability to quickly expand or decrease computer processing, memory and storage resources.

Elasticity is a core benefit of cloud computing and lets even small businesses take advantage of the cloud.

Question 13

What does Infrastructure-as-a-Service describe?

Answer 13

A type of cloud computing service that offers essential compute, storage and networking resources on demand, on a pay-as-you-go basis.

IaaS lets you bypass the cost and complexity of buying and managing physical servers and data centre infrastructure.

Question 14

What are some benefits to private and hybrid clouds

Answer 14

Private Clouds can be hosted at your datacenter or hosted by a third-party service. Private Clouds offer advantages of flexibility, control, and scalability. In a Private Cloud, infrastructure and services exist on hardware and software dedicated to your organization.
They use a shared tenant model.

A hybrid cloud combines a public cloud (such as Azure) with on-premises infrastructure (private cloud).

Question 15

How does scalability on Azure work?

Answer 15

In Microsoft’s definition, scalability is the ability of a system to handle increased load. Services covered by Azure Autoscale can match demand to the needed workload.

Question 16

What is “serverless” computing?

Answer 16

When all servers for a solution are abstracted away and managed by someone else.

Question 17

What is a benefit of a hybrid cloud approach?

Answer 17

It enables companies to use a mix of private and public cloud components.

A hybrid cloud model is the best of private and public cloud that can be used to avoid disruptions and outages, adhere to regulation and governance, span solutions across both public and private cloud, and alleviate CapEx investments.

Question 18

What is the difference between OPEX and CAPEX?

Answer 18

OPEX is an ongoing cost for running a business. CAPEX is the cost of acquiring and maintaining assets.

Question 19

What are the two types of scaling on Azure?

Answer 19

Scaling up and down is making a resource, such as a VM, larger or smaller. This is also known as “Scaling vertically”. Scaling out is adding more resources of the same type, known as “Scaling horizontally”

Question 20

What is an Azure Region?

Answer 20

An Azure region is a set of data centers, deployed within a latency-defined perimeter and connected through a dedicated regional low-latency network.

With more global regions than any other cloud service provider, Azure gives customers the flexibility to deploy applications where they need. An Azure region has discrete pricing and service availability.

Question 21

When can you remove a resource group from Azure?

Answer 21

When a resource group is removed or deleted, all of the resources within it are deleted with it. You can remove resource groups at any time.

Question 22

What is a resource group?

Answer 22

It is a container that holds related resources for an Azure solution.

Resources belong to a resource group, which can be a logical, geographical, customer-specific or any other type of grouping.

Question 23

What is an availability zone?

Answer 23

AZs are individual physical locations within a region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking.

Question 24

What do Azure Resource Managers do?

Answer 24

Azure Resource Manager handles the request for any Azure tools, APIs, or SDKs.

Azure Resource Manager enables you to create, update, and delete resources in your Azure account.

When you deploy resources through Azure Resource Manager, resources in the specified resource group should share the same lifecycle.
Resource Group resources should share the same lifecycle for ease of management.

Question 25

What is a scale set?

Answer 25

Azure virtual machine scale sets let you create and manage a group of load balanced VMs.

Question 26

What is an Azure Function?

Answer 26

Azure Functions are single-task services that can take an input, process it, and then die
A single unit of compute that is triggered by a separate process.
A serverless service on Azure.
Can Integrate with functions

Question 27

Which cloud service model do Virtual Machines belong to?

Answer 27

IaaS

Question 28

What are some benefits of using a Virtual Machine on Azure?

Answer 28

No maintenance of hardware and only paying for what you use.

Question 29

What is a fully managed platform on Azure?

Answer 29

Servers, network, storage and more is all managed by Azure. You focus on your business value and logic.

Question 30

Which definition best describes compute on Microsoft Azure?

Answer 30

Any service that performs or enables a computation.

Question 31

Your company has suddenly got a bunch of new remote employees, who all need a Windows environment to work from. Which is the best Azure solution to get them up and running quickly?

Answer 31

Azure Virtual Desktop (formerly Windows Virtual Desktop).