AZ-900: Microsoft Azure Fundamentals
What are two characteristics of the public cloud?
dedicated hardware
unsecured connections
limited storage
metered pricing
self-service management
Answers are; metered pricing
self-service management
With the public cloud, you get pay-as-you-go pricing you pay only for what you use, no CapEx costs.
With the public cloud, you have self-service management. You are responsible for the deployment and configuration of the cloud resources such as virtual machines or web sites. The underlying hardware that hosts the cloud resources is managed by the cloud provider.
Incorrect Answers:
A: You don't have dedicated hardware. The underlying hardware is shared so you could have multiple customers using cloud resources hosted on the same physical hardware.
B: Connections to the public cloud are secure.
C: Storage is not limited. You can have as much storage as you like.
References:
https://docs.microsoft.com/en-gb/learn/modules/principles-cloud-computing/4-cloud-deployment-models
You plan to migrate a web application to Azure. The web application is accessed by external users.
You need to recommend a cloud deployment solution to minimize the amount of administrative effort used to manage the web application.
What should you include in the recommendation?
Software as a Service (SaaS)
Platform as a Service (PaaS)
Infrastructure as a Service (IaaS)
Database as a Service (DaaS)
Answer is Platform as a Service (PaaS)
Azure App Service is a platform-as-a-service (PaaS) offering that lets you create web and mobile apps for any platform or device and connect to data anywhere, in the cloud or on-premises. App Service includes the web and mobile capabilities that were previously delivered separately as Azure Websites and Azure Mobile Services.
References:
https://docs.microsoft.com/en-us/azure/security/fundamentals/paas-applications-using-app-services
Which cloud deployment solution is used for Azure virtual machines and Azure SQL databases?
To answer, select the appropriate options in the answer area.
Box 1:
Azure virtual machines are Infrastructure as a Service (IaaS).
Infrastructure as a Service is the most flexible category of cloud services. It aims to give you complete control over the hardware that runs your application (IT infrastructure servers and virtual machines (VMs), storage, networks, and operating systems). Instead of buying hardware, with IaaS, you rent it.
Box 2:
Azure SQL databases are Platform as a Service (Paas).
Azure SQL Database is a fully managed Platform as a Service (PaaS) Database Engine that handles most of the database management functions such as upgrading, patching, backups, and monitoring without user involvement. Azure SQL Database is always running on the latest stable version of SQL Server Database Engine and patched OS with 99.99% availability. PaaS capabilities that are built-in into Azure SQL database enable you to focus on the domain specific database administration and optimization activities that are critical for your business.
Reference:
https://docs.microsoft.com/en-gb/learn/modules/principles-cloud-computing/5-types-of-cloud-services
https://docs.microsoft.com/en-us/azure/sql-database/sql-database-paas-index
You plan to provision Infrastructure as a Service (IaaS) resources in Azure.
Which resource is an example of IaaS?
an Azure web app
an Azure virtual machine
an Azure logic app
an Azure SQL database
Answer is an Azure virtual machine
An Azure virtual machine is an example of Infrastructure as a Service (IaaS).
Azure web app, Azure logic app and Azure SQL database are all examples of Platform as a Service (Paas).
References:
https://azure.microsoft.com/en-gb/overview/what-is-iaas/
https://azure.microsoft.com/en-gb/overview/what-is-paas/
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?
Software as a Service (SaaS)
Platform as a Service (PaaS)
Infrastructure as a Service (laaS)
Answer is Infrastructure as a Service (laaS)
Infrastructure as a service (IaaS) is an instant computing infrastructure, provisioned and managed over the internet. The IaaS service provider manages the infrastructure, while you purchase, install, configure, and manage your own software
Incorrect Answers:
A: 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. In this scenario, you need to run your own apps, and therefore require an infrastructure.
B: Platform as a service (PaaS) is a complete development and deployment environment in the cloud. PaaS includes infrastructure servers, storage, and networking but 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.
References:
https://azure.microsoft.com/en-us/overview/what-is-iaas/
https://azure.microsoft.com/en-us/overview/what-is-saas/ https://azure.microsoft.com/en-us/overview/what-is-paas/
You plan to extend your company's network to Azure. The network contains a VPN appliance that uses an IP address of 131.107.200.1.
You need to create an Azure resource that defines the VPN appliance in Azure.
Which Azure resource should you create?
A Local Network Gateway is an object in Azure that represents your on-premise VPN device. A Virtual Network Gateway is the VPN object at the Azure end of the VPN. A connection is what connects the Local Network Gateway an the Virtual Network Gateway to bring up the VPN.
The local network gateway typically refers to your on-premises location. You give the site a name by which Azure can refer to it, then specify the IP address of the on-premises VPN device to which you will create a connection. You also specify the IP address prefixes that will be routed through the VPN gateway to the VPN device. The address prefixes you specify are the prefixes located on your on-premises network. If your on-premises network changes or you need to change the public IP address for the VPN device, you can easily update the values later.
References:
https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-howto-site-to-site-resource-manager-portal
You plan to create an Azure virtual machine.
You need to identify which storage service must be used to store the unmanaged data disks of the virtual machine.
What should you identify?
Containers
File shares
Tables
Queues
Answer is Containers
Azure containers are the backbone of the virtual disks platform for Azure IaaS. Both Azure OS and data disks are implemented as virtual disks where data is durably persisted in the Azure Storage platform and then delivered to the virtual machines for maximum performance. Azure Disks are persisted in Hyper-V VHD format and stored as a page blob in Azure Storage.
Reference:
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-pageblob-overview
Match the Azure services benefits to the correct descriptions.
Answer is Fault Tolerance, Disaster Recovery, Dynamic Scalability and Low Latency
Box 1:
Fault tolerance is the ability of a service to remain available after a failure of one of the components of the service. For example, a service running on multiple servers can withstand the failure of one of the servers.
Box 2:
Disaster recovery is the recovery of a service after a failure. For example, restoring a virtual machine from backup after a virtual machine failure.
Box 3:
Dynamic scalability is the ability for compute resources to be added to a service when the service is under heavy load. For example, in a virtual machine scale set, additional instances of the virtual machine are added when the existing virtual machines are under heavy load.
Box 4:
Latency is the time a service to respond to requests. For example, the time it takes for a web page to be returned from a web server. Low latency means low response time which means a quicker response.
References:
https://msdn.microsoft.com/en-us/magazine/mt422582.aspx
https://searchdisasterrecovery.techtarget.com/definition/cloud-disaster-recovery-cloud-DR
http://www.siasmsp.com/the-benefit-of-scalability-in-cloud-computing-2/
https://azure.microsoft.com/en-in/overview/what-is-cloud-computing/
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?
Azure virtual machines, Azure SQL databases, and Azure Storage accounts.
an Azure App Service and Azure virtual machines that have Microsoft SQL Server installed.
an Azure App Service and Azure SQL databases.
Azure storage accounts and web server in Azure virtual machines.
Answer is an Azure App Service and Azure SQL databases.
Azure App Service and Azure SQL databases are examples of Azure PaaS solutions. Therefore, this solution does meet the goal.
A company has the following on-premise data stores.
- A Microsoft SQL Server 2012 database.
- A Microsoft SQL Server 2008 database.
- The data needs to be migrated to Azure.
Requirement 2 - The data in a table in the Microsoft SQL Server 2008 database needs to be migrated to an Azure CosmosDB account that uses the SQL API.
Which of the following should be used to accomplish Requirement2?
AzCopy
Azure CosmosDB Data Migration tool
Data Management Gateway
Data Migration Assistant
Answer is Azure CosmosDB Data Migration tool
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/import-data