AZ-900 Quiz1

Is the underlined portion of the following statement true, or does it need to be replaced with one of the other fragments that appear below? As a cloud service, Microsoft Azure enables your organization to budget IT infrastructure costs as a capital expenditure.

• as an operational expenditure.

• on an annual basis.

• using the Azure Pricing Estimator.

• No change is needed.

Answer explanation

Azure enables your organization to pay for only those services it uses, which enables you

to budget your IT infrastructure costs as an operational expenditure based on the services

you consume in each month. Operational expenditures are generally those that you consume

on a pay-as-you-go basis. By contrast, purchasing hardware and software would require a

capital expenditure, which is an acquisition of fixed assets.

The cost per subscriber decreases as the number of Azure subscribers increases. Which benefit of cloud computing does this statement describe?

• Agility

• Scalability

• Economy of scale

• Elasticity

Answer explanation

Microsoft acquires large amounts of hardware and other infrastructure resources to

support Azure, enabling it to purchase at a reduced cost, which represents an economy

of scale. In addition, distributing those resources among multiple customers also drives

economy of scale and reduces the end cost to consumers of Azure.

You are an IT manager for a small company that hosts a web application for e-commerce. The web application uses two web servers and a small database cluster. As demand increases through a peak season, you want to add additional web servers to handle the increased demand, then remove those additional servers as demand decreases. You propose moving the application to Azure. Which of the following statements is true?

• The web servers can be moved to Azure but the database cluster must remain on-premises, which represents a hybrid cloud model.

• Horizontal scaling enables you to add and remove web servers to meet demand changes.

• Vertical scaling enables you to add and remove web servers to meet demand changes.

• Azure will automatically add the web servers for you as demand approaches a threshold set by the Azure App Service.

Answer explanation

This scenario represents an example of horizontal scaling (scalability) because you are

adding servers. If you were adding memory to the web server instead of adding servers,

it would represent an example of vertical scaling. There is no restriction on moving the

database cluster to Azure along with the web server. Finally, though Azure can perform

both horizontal and vertical scaling, you must configure autoscaling—it does not happen

by default.

You are an IT director for Contoso and are preparing a proposal to your CIO to move all IT infrastructure to Azure. Which of the following is an advantage to moving your infrastructure to a public cloud provider?

• You will have complete control over all infrastructure, network, applications, and all other resources in the cloud.

• You can scale your infrastructure horizontally or vertically without capital expenditure costs.

• You will reduce your operational expenditures.

• The cloud provider will manage all infrastructure for you, enabling Contoso to reduce IT staff.

Answer explanation

Moving to a public cloud enables you to easily scale your infrastructure as needed. In a public cloud, you do not have full control over all resources since many of the resources are managed by the cloud provider. Your operational expenditures will increase but capital expenditures will decrease. Contoso will still need to manage the infrastructure, so a reduction in IT staff is not guaranteed.

Contoso is building a web application that uses a SQL database to store data. Which of the following represents a hybrid cloud scenario? (Choose all that apply.)

• A virtual machine in Azure that hosts the web application and a second virtual machine in Azure running SQL Server

• A two-node SQL cluster in a third-party data center that hosts the data and two virtual machines in Azure running the web application

• A web application hosted in Azure that stores its data in an Azure SQL database

• A web application hosted in Azure that sends data to and from a database hosted in Contoso's on-premises data center

Answer explanation

hybrid cloud scenario exists where services hosted in Azure interact with services hosted outside of Azure, whether in a third-party data center, your own data center, or a private cloud. Options A and C both represent a public cloud scenario because all services are hosted within Azure.

Is the underlined portion of the following statement true, or does it need to be replaced with one of the other fragments that appear below? Moving servers from an on-premises data center to virtual machines in Azure enables you to reduce IT staffing because Microsoft manages the infrastructure for you.

• enables you to pay for only the Azure resources you consume on a monthly basis.

• represents a platform-as-a-service (PaaS) solution.

• enables you to use additional firewall services only available in Azure to protect against security risks.

• No change is needed.

Answer explanation

This scenario represents a consumption-based model where you pay for only those Azure

resources that you consume. It does not involve Azure services for developing web applications,

and therefore does not represent a PaaS solution. IT staffing is not necessarily reduced

because you must still manage the virtual machines, operating systems, and applications

running on them. Although you can use several firewall-related services in Azure, you could

deploy those same or similar solutions in your own data center.

You are the application development director for Contoso. Your team needs to develop and bring a new web application online quickly with minimal expense. You consider using Azure Web Apps, Azure Functions, and Azure Database for MySQL. Which Azure service category does this represent?

• Infrastructure-as-a-service (IaaS)

• Platform-as-a-service (PaaS)

• Software-as-a-service (SaaS)

• Development-as-a-service (DaaS)

Answer explanation

This scenario does not leverage virtual machines or infrastructure that you manage and

therefore does not represent IaaS. You are developing custom applications rather than using

applications provided by Microsoft, so this scenario does not represent an SaaS solution.

There is no DaaS service category in Azure

Your company currently installs Microsoft Office on each user's computer using perpetual licenses that you have purchased from a licensing vendor. You propose to the CIO to transition your users to Microsoft 365 to use Office applications hosted by Microsoft, which enables your organization to work with documents in a web browser and also receive Office application updates automatically. This represents which service category?

• Infrastructure-as-a-service (IaaS)

• Platform-as-a-service (PaaS)

• Software-as-a-service (SaaS)

• None of the above

Answer explanation

With Microsoft 365, Microsoft manages the Office applications that your users consume

through an assigned subscription. Microsoft manages the applications and updates. Although

you determine who has access through subscription assignment, Microsoft manages all other

aspects of the software. This represents SaaS. Development services are not part of the solution,

so PaaS is not correct. Virtual machines and other infrastructure are not involved, so

IaaS is not correct.

You are a server administrator for Wingtip Toys, a small company that makes and distributes wooden toys. You manage a custom line-of-business (LOB) application for order management and shipping. The solution is hosted on aging servers in a server room in your manufacturing facility. You want to eventually move the application's functions to Microsoft Dynamics 365 and eliminate the custom application. You propose to your manager that you first migrate the servers into virtual machines hosted in Azure to avoid purchasing new, up-to-date hardware. The current application will run on these new VMs. This proposal represents which of the following?

• Software-as-a-service (SaaS)

• Infrastructure-as-a-service (IaaS)

• Platform-as-a-service (PaaS)

• A hybrid cloud scenario

Answer explanation

You are replacing your on-premises servers with VMs hosted in Azure, which represents

an IaaS solution. You are not using any development services to redesign the application

(Paas) or moving to Dynamics 365 (SaaS) at this time. This scenario does not

describe integration between services hosted on-premises and in Azure, so it is not a hybrid

cloud scenario.

You are the CIO for a company and are concerned about the security of your data in the cloud. You need to implement a cloud solution in which you gain the flexibility and agility of a cloud solution but maintain full control of your data and infrastructure. You propose to your CEO that you contract with a third-party cloud vendor to host your IT services, and the infrastructure on which your services will be hosted will not be used by any other organization. This represents which type of cloud model?

• Public cloud

• Private cloud

• Hybrid cloud

• Both A and B

Answer explanation

The third-party provider manages the hardware, networking, and other resources for you,

but you maintain control over the VMs, applications, and data. Because no other organizations

are using those resources and there is no stated integration between the cloud and your

on-premises services, this scenario represents a private cloud model.