AZ-900 Exam

Hybrid Cloud

A hybrid cloud is a mix of public cloud resources and on-premises resources. Therefore, you have a choice to use either.

Private Cloud

A private cloud exists on premises, so you have complete control over security.

What does a customer provide in a software as a service (SaaS) model? A. application data B. data storage C. compute resources D. application software

A. SaaS provides a complete software solution which you purchase on a pay-as-you-go basis from a cloud service provider. You rent the use of an app for your organization and your users connect to it over the Internet, usually with a web browser. All of the underlying infrastructure, middleware, app software and app data are located in the service providerג€™s data center. The service provider manages the hardware and software and with the appropriate service agreement, will ensure the availability and the security of the app and your data as well.

Azure Cosmos DB is an example of a _______ offering (PaaS, SaaS, or IaaS)

Azure Cosmos DB is an example of a platform as a service (PaaS) cloud database provider.

Your developers have created 10 web applications that must be host on Azure.You need to determine which Azure web tier plan to host the web apps. The web tier plan must meet the following requirements: ✑ The web apps will use custom domains. ✑ The web apps each require 10 GB of storage. ✑ The web apps must each run in dedicated compute instances. ✑ Load balancing between instances must be included. ✑ Costs must be minimized. Which web tier plan should you use? A. Standard B. Basic C. Free D. Shared

B. Basic

You are planning to migrate a company to Azure. Each of the company's numerous divisions will have an administrator in place to manage the Azure resources used by their respective division. You want to make sure that the Azure deployment you employ allows for Azure to be segmented for the divisions, while keeping administrative effort to a minimum. Solution: You plan to make use of several Azure Active Directory (Azure AD) directories. Does the solution meet the goal? A. Yes B. No

B. No

Your company plans to migrate all its data and resources to Azure. The company's migration plan states that only Platform as a Service (PaaS) solutions must be used in Azure. You need to deploy an Azure environment that meets the company's migration plan. What should you create? A. Azure virtual machines, Azure SQL databases, and Azure Storage accounts. B. an Azure App Service and Azure virtual machines that have Microsoft SQL Server installed. C. an Azure App Service and Azure SQL databases. D. Azure storage accounts and web server in Azure virtual machines.

C. Azure App Service and Azure SQL databases are examples of Azure PaaS solutions. Therefore, this solution does meet the goal. Next Question

Your company intends to subscribe to an Azure support plan.The support plan must allow for new support requests to be opened.Which of the following are support plans that will allow this?

Developer, Standard, Professioal Direct, and Premier

T/F: With SaaS, you must apply software updates

False

T/F: You can create a resource group inside of another resource group

False

T/F: A PaaS solution that hosts web apps in Azure provides full control of the operating systems that host applications

False. A PaaS solution does not provide access to the operating system. The Azure Web Apps service provides an environment for you to host your web applications. Behind the scenes, the web apps are hosted on virtual machines running IIS. However, you have no direct access to the virtual machine, the operating system or IIS.

T/F: Building a data center is an example of operational expenditure (OPEx) costs

False. Building a data center infrastructure is capital expenditure, not operation expenditure.

T/F: An azure virtual machine can be in multiple resource groups

False. Each resource can exist in only one resource group.

T/F: Azure Cosmos DB is an example of SaaS

False. Is PaaS

T/F: A private cloud must be disconnected from the internet

False. It is not true that a private cloud must be disconnected from the Internet. Private clouds can be and most commonly are connected to the Internet. Private cloud means that the physical servers are managed by you. It does not mean that it is disconnected from the Internet.

T/F: Microsoft SQL Server 2019 installed on an azure virtual machine is an example of PaaS

False. Upgrades done by msft

T/F: A company can extend a private cloud by adding its own physical servers to the public cloud

False. You cannot add physical servers to the public cloud. You can only deploy virtual servers in the public cloud. You can extend a private cloud by deploying virtual servers in a public cloud. This would create a hybrid cloud.

You are tasked with deploying Azure virtual machines for your company. You need to make use of the appropriate cloud deployment solution. Solution: You should make use of SaaS/PaaS/or IaaS. What solution will meet the goal?

IaaS

Your company plans to deploy several custom applications to Azure. The applications will provide invoicing services to the customers of the company. Each application will have several prerequisite applications and services installed. You need to recommend a cloud deployment solution for all the applications. What should you recommend?

Infrastructure as a Service (laaS)

Your company plans to migrate all its data and resources to Azure. The company's migration plan states that only Platform as a Service (PaaS) solutions must be used in Azure. You need to deploy an Azure environment that meets the company migration plan. Solution: You create Azure virtual machines, Azure SQL databases, and Azure Storage accounts. Does this meet the goal?

No. Platform as a service (PaaS) is a complete development and deployment environment in the cloud. PaaS includes infrastructure servers, storage, and networkingnbut also middleware, development tools, business intelligence (BI) services, database management systems, and more. PaaS is designed to support the complete web application lifecycle: building, testing, deploying, managing, and updating. However, virtual machines are examples of Infrastructure as a service (IaaS). IaaS is an instant computing infrastructure, provisioned and managed over the internet.

A Msft SQL DB that is hosted in the cloud and has software updates managed by Azure is an example of______ A. DRaaS B. IaaS C. PaaS D. SaaS

PaaS

Your company has datacenters in Los Angeles and New York. The company has a Microsoft Azure subscription. You are configuring the two datacenters as geo-clustered sites for site resiliency. You need to recommend an Azure storage redundancy option. You have the following data storage requirements: ✑ Data must be stored on multiple nodes. ✑ Data must be stored on nodes in separate geographic locations. ✑ Data can be read from the secondary location as well as from the primary location Which of the following Azure stored redundancy options should you recommend? A. Geo-redundant storage B. Read-only geo-redundant storage C. Zone-redundant storage D. Locally redundant storage

RA-GRS allows you to have higher read availability for your storage account by providing read only access to the data replicated to the secondary location. Once you enable this feature, the secondary location may be used to achieve higher availability in the event the data is not available in the primary region. This is an opt-in feature which requires the storage account be geo-replicated.

T/F: A PaaS solution that hosts web apps in Azure can be provided with additional memory by changing the pricing tier

True

T/F: Azure Backup is an example of PaaS

True

T/F: Azure SQL DB is an example of PaaS

True

T/F: With IaaS, you must install the software that you want to use

True

T/F: A PaaS solution that hosts web apps in Azure can be configured to automatically scale the number of instances based on demand

True. A PaaS solution that hosts web apps in Azure does provide the ability to scale the platform automatically. This is known as autoscaling. Behind the scenes, the web apps are hosted on virtual machines running IIS. Autoscaling means adding more load balanced virtual machines to host the web apps.

T/F: To build a hybrid cloud, you must deploy resources to the public cloud

True. A hybrid cloud is a combination of a private cloud and public cloud. Therefore, to create a hybrid cloud, you must deploy resources to a public cloud.

T/F: Leasing software is an example of operational expenditure (OPEx) costs

True. OpEx is ongoing costs (costs of operations) such as leasing software. If you purchased software as a one-off purchase, that would be CapEx, but leasing software is ongoing so it's OpEx.

T/F: Monthly salaries for technical peronnel are an example of operational expenditure (OPEx) costs

True. OpEx is ongoing costs (costs of operations) such as staff salaries.

T/F: A resource group can contain resources from multiple Azure regions

True. Resources from multiple different regions can be placed in a resource group. The resource group only contains metadata about the resources it contains.

Y/N: Microsoft Intune is an example of SaaS

Yes

Platform as a Service (PaaS)

a complete development and deployment environment in the cloud, with resources that enable you to deliver everything from simple cloud-based apps to sophisticated, cloud-enabled enterprise applications

Infrastructure as a service (IaaS)

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

Software as a Service (SaaS)

allows users to connect to and use cloud-based apps over the Internet. Common examples are email, calendaring, and office tools (such as Microsoft Office 365).

You have 50 virtual machines hosted on-premises and 50 virtual machines hosted in Azure. The on-premises virtual machines and the Azure virtual machines connect to each other.Which type of cloud model is this? A. hybrid B. private C. public

hybrid

Capital expenditures (CAPEX)

major purchases a company makes that are designed to be used over the long term

Operating expenses (OPEX)

the day-to-day expenses a company incurs to keep its business operational.

Public Cloud

there is no capital expenditure on server hardware etc. You only pay for cloud resources that you use as you use them.

Y/N: A DNS server that runs on an azure virtual machine is an example of PaaS

yes

Yes/No: Azure Files is an example of IaaS

yes