Which of the following statements are true ?

1. 1. A platform as a service (PaaS) solution that hosts web apps in Azure provides full control of the operating systems that host applications

3. 2. A platform as a service (PaaS) solution that hosts web apps in Azure provides the ability to scale the platform automatically.

5. 3. A platform as a service (PaaS) solution that hosts web apps in Azure provides professional development services to continuously add features to custom applications

• 1,2,3 are correct

• 1 & 3 are correct

• 2 & 3 are correct

• 1 & 2 are correct

Answer explanation

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/

1. What does a customer provide in a software as a service (SaaS) model?

• application data

• data storage

• compute resources

• application software

Answer explanation

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 provider 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.

A company wants to make use of an Azure service in private preview.

Are Azure services in private preview available only to a selective portion of customers?

•      Yes

• No

Answer explanation

Services in private preview are only available a few customers to take part in early access to new concepts and features.

A company wants to migrate its current on-premises servers to Azure.

They want to ensure that the servers are running even if a single Azure Data Center goes down.

Which of the following terms refers to the solution that needs to be in place to fulfill this requirement?

•   Fault tolerance

•   Elasticity

• Scalability

• Low Latency

Answer explanation

This concept of Fault tolerance refers to achieving high availability on the cloud.

A company is planning to create several Virtual Machines in Azure.

Which of the following is the right category to which the Azure Virtual Machine belongs ?

• Infrastructure as a service (IaaS)

• Platform as a service (PaaS)

• Software as a service (SaaS)

• Function as a service (FaaS)

Answer explanation

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 explanation

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:
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.

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.

Which of the following describes a benefit of cloud services?

• Economies of scale

• Fixed workloads

• Unpredictable costs

• None of the above

Answer explanation

Answer is Economies of scale. Economies of scale is the ability to do things more cheaply and more efficiently when operating at a larger scale in comparison to operating at a smaller scale.

     Which of the following refers to spending money upfront and then deducting that expense over time?

• Capital expenditure

• Capital expenditure

• Capital expenditure

• None of the above

Answer explanation

Answer is Capital expenditure. Capital expenditure refers to spending of money on physical infrastructure up front, and then deducting that expense from your tax bill over time.

Which of the following terms refer to making a service available with no downtime for an extended period of time?

• Agility

• High availability

• High availability

• None of the above

Answer explanation

Answer is High availability. High availability keeps services up and running for long periods of time, with little downtime, depending on the service in question.

Which term from the list below would be viewed as benefits of using cloud services?

• Agility

• Elasticity

• Economies of scale

• All of the above

Answer explanation

Elasticity, agility and economies of scale are the correct answers, and would be seen as benefits that you can gain from using cloud services