AZ-900: Microsoft Azure Fundamentals
Which of the following describes Platform as a Service (PaaS)?
Users are responsible for purchasing, installing, configuring, and managing their own software (operating systems, middleware, and applications).
Users create and deploy applications quickly without having to worry about managing the underlying infrastructure.
Users pay an annual or monthly subscription.
Answer is Users create and deploy applications quickly without having to worry about managing the underlying infrastructure.
PaaS lets users create and deploy applications quickly without having to worry about managing the underlying infrastructure.
Which of the following requires the most user management of the cloud services?
Infrastructure as a Service
Platform as a Service
Software as a Service
Answer is Infrastructure as a Service
Infrastructure as a Service requires the most user management of cloud services.
You're developing an application and want to focus on building, testing, and deploying. You don't want to worry about managing the underlying hardware or software. Which cloud service type is best for you?
Infrastructure as a Service (IaaS)
Software as a Service (SaaS)
Platform as a Service (PaaS)
Answer is Platform as a Service (PaaS)
Platform as a Service is the best choice here because the PaaS services handle the IT management tasks for you, so you can focus on writing code.
You are running a virtual machine in a public cloud using IaaS. Which model correctly reflects how that resource is managed?
Shared responsibility model
Cloud user management model
User management model
Answer is Shared responsibility model.
The shared responsibility model is the correct answer. Under the shared responsibility model, management of the resource is shared between the cloud provider and the end user. The cloud provider being responsible for the cloud services infrastructure and the end user being responsible for the service being configured and managed correctly.
You plan to use the Workspace.from_config() method to connect to your Azure Machine Learning workspace from a Python environment on your local workstation. You have already used pip to install the azureml-sdk package.
What else should you do?
Run pip install azureml-sdk['notebooks'] to install the notebooks extra.
Download the config.json file for your workspace to the folder containing your local Python code files.
Create a Compute Instance compute target in your workspace.
Answer is Download the config.json file for your workspace to the folder containing your local Python code files.
To connect to a workspace from an environment outside of the workspace, you should download the config.json file for your workspace from the Azure portal. This includes the subscription and workspace information necessary to connect.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Box 1: No
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.
Box 2: Yes
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.
Box 3: Yes
PaaS provides a framework that developers can build upon to develop or customize cloud-based applications. PaaS development tools can cut the time it takes to code new apps with pre-coded application components built into the platform, such as workflow, directory services, security features, search and so on.
References:
https://azure.microsoft.com/en-gb/overview/what-is-paas/
To complete the sentence, select the appropriate option in the answer area.
When you are implementing a Software as a Service (SaaS) solution, you are responsible for configuring the SaaS solution. Everything else is managed by the cloud provider.
SaaS requires the least amount of management. The cloud provider is responsible for managing everything, and the end user just uses the software.
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).
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.
Reference:
https://azure.microsoft.com/en-in/overview/what-is-saas/
https://docs.microsoft.com/en-gb/learn/modules/principles-cloud-computing/5-types-of-cloud-services
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Box 1: No
It is not true that a company must always migrate from a private cloud model to implement a hybrid cloud. You could start with a public cloud and then combine that with an on-premise infrastructure to implement a hybrid cloud.
Box 2: Yes
A company can extend the capacity of its internal network by using the public cloud. This is very common. When you need more capacity, rather than pay out for new on-premises infrastructure, you can configure a cloud environment and connect your on-premises network to the cloud environment by using a VPN.
Box 3: No
It is not true that only guest users can access cloud resources. You can give anyone with an account in Azure Active Directory access to the cloud resources.
There are many authentication scenarios but a common one is to replicate your on-premises Active Directory accounts to Azure Active Directory and provide access to the Azure Active Directory accounts. Another commonly used authentication method is Federation where authentication for access to cloud resources is passed to another authentication provider such as an on-premises Active Directory.
Reference:
https://azure.microsoft.com/en-gb/overview/what-is-hybrid-cloud-computing/
You plan to migrate several servers from an on-premises network to Azure.
What is an advantage of using a public cloud service for the servers over an on-premises network?
The public cloud is owned by the public, NOT a private corporation
The public cloud is a crowd-sourcing solution that provides corporations with the ability to enhance the cloud
All public cloud resources can be freely accessed by every member of the public
The public cloud is a shared entity whereby multiple corporations each use a portion of the resources in the cloud
Answer is The public cloud is a shared entity whereby multiple corporations each use a portion of the resources in the cloud
The public cloud is a shared entity whereby multiple corporations each use a portion of the resources in the cloud. The hardware resources (servers, infrastructure etc.) are managed by the cloud provider. Multiple companies create resources such as virtual machines and virtual networks on the hardware resources.
Incorrect Answers:
A: The public cloud is not owned by the public. In the case of Microsoft Azure, the cloud is owned by Microsoft.
B: The public cloud is a not crowd-sourcing solution. In the case of Microsoft Azure, the cloud is owned by Microsoft.
C: It is not true that public cloud resources can be freely accessed by every member of the public. You pay for a cloud subscription and create accounts for your users to access your cloud resources. No one can access your cloud resources until you create user accounts and provide the appropriate access permissions.
In which type of cloud model are all the hardware resources owned by a third-party and shared between multiple tenants?
private
hybrid
public
Answer is public
Microsoft Azure, Amazon Web Services and Google Cloud are three examples of public cloud services. Microsoft, Amazon and Google own the hardware. The tenants are the customers who use the public cloud services.