Describe cloud concepts for Microsoft Azure Fundamentals (AZ-900)

Sample Practice Questions

1. Question 1

   Note: The question is included in a number of questions that depicts the identical set-up. However, every question has a distinctive result. Establish if the solution satisfies the requirements. 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 Software as a Service (SaaS). Does the solution meet the goal?
   1. A. Yes
   2. B. No
   Explanation

   The correct answer is: B. No.

   The solution does not meet the goal, so the answer is No, because deploying Azure virtual machines requires Infrastructure as a Service, not Software as a Service. SaaS delivers a finished, ready-to-consume application such as Microsoft 365 or Dynamics 365 over the internet; consumers of SaaS have no access to underlying virtual machines and cannot deploy their own VMs through that model at all. IaaS is the model designed for VM deployment because it surfaces virtualized compute, storage, and networking with customer control over the guest OS. Platform as a Service is also incorrect for VM deployment because it abstracts the VM away in favor of a managed runtime. Only the IaaS variant of this scenario meets the stated goal of deploying Azure virtual machines.

2. Question 2

   Note: The question is included in a number of questions that depicts the identical set-up. However, every question has a distinctive result. Establish if the solution satisfies the requirements. 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 Platform as a Service (PaaS). Does the solution meet the goal?
   1. A. Yes
   2. B. No
   Explanation

   The correct answer is: B. No.

   The solution does not meet the goal, so the answer is No: Platform as a Service is not the right model for deploying Azure virtual machines because PaaS abstracts the VM and operating system away from the customer entirely, providing a managed runtime where developers deploy code rather than provision machines. Infrastructure as a Service is the model that surfaces virtual machines as the primary unit of deployment, giving the customer control over the guest OS, patches, and installed software, which is exactly what virtual-machine deployment requires. Software as a Service is also wrong because it delivers finished applications and exposes no VM layer at all. Only IaaS satisfies a requirement that explicitly names virtual machines, so any solution proposing PaaS or SaaS for VM deployment fails the goal.

3. Question 3

   Note: The question is included in a number of questions that depicts the identical set-up. However, every question has a distinctive result. Establish if the solution satisfies the requirements. 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 Infrastructure as a Service (IaaS). Does the solution meet the goal?
   1. A. Yes
   2. B. No
   Explanation

   The correct answer is: A. Yes.

   The solution meets the goal, so the answer is Yes: deploying Azure virtual machines is the canonical Infrastructure as a Service workload because IaaS is the service tier that exposes virtualized compute, storage, and networking while leaving the customer in charge of the guest operating system, patching, middleware, and application. Platform as a Service abstracts the VM away and would not be appropriate when the explicit requirement is to deploy virtual machines you can manage yourself. Software as a Service does not expose VMs at all; it delivers a finished application. Because the requirement names virtual machines as the unit of deployment, IaaS is precisely the correct cloud service model, which is why this solution variant succeeds where the PaaS and SaaS variants of the same scenario fail.

4. Question 4

   Note: The question is included in a number of questions that depicts the identical set-up. However, every question has a distinctive result. Establish if the solution satisfies the requirements. Your company is planning to migrate all their virtual machines to an Azure pay-as-you-go subscription. The virtual machines are currently hosted on the Hyper-V hosts in a data center. You are required make sure that the intended Azure solution uses the correct expenditure model. Solution: You should recommend the use of the scalable expenditure model. Does the solution meet the goal?
   1. A. Yes
   2. B. No
   Explanation

   The correct answer is: B. No.

   The solution does not meet the goal, so the answer is No: there is no such thing as a scalable expenditure model in Microsoft's financial terminology. The two recognized models are capital expenditure (CapEx), the up-front purchase of long-lived assets like servers, and operational expenditure (OpEx), the ongoing usage-based cost of consuming a service. Azure pay-as-you-go billing is a textbook example of OpEx because charges accrue as you use resources rather than as a depreciating asset. Scalability is a real cloud benefit describing the ability to add or remove capacity, but it is not an expenditure model and cannot be the answer to a question about how spending is classified. Only operational expenditure correctly describes Azure pay-as-you-go, so this variant of the scenario fails.

5. Question 5

   Note: The question is included in a number of questions that depicts the identical set-up. However, every question has a distinctive result. Establish if the solution satisfies the requirements. Your company is planning to migrate all their virtual machines to an Azure pay-as-you-go subscription. The virtual machines are currently hosted on the Hyper-V hosts in a data center. You are required make sure that the intended Azure solution uses the correct expenditure model. Solution: You should recommend the use of the operational expenditure model. Does the solution meet the goal?
   1. A. Yes
   2. B. No
   Explanation

   The correct answer is: A. Yes.

   Recommending the operational expenditure model is correct because Azure pay-as-you-go billing converts what would have been a large up-front hardware purchase into a recurring usage-based charge, which is the definition of operational expenditure (OpEx): ongoing, metered costs for running the business rather than a depreciating capital asset. Capital expenditure (CapEx) is the model you leave behind when you decommission the on-premises Hyper-V hosts, because there is no longer a server purchase to depreciate over years. Since the migration explicitly shifts spending from buying hardware to paying for consumed cloud resources, OpEx is the correct expenditure classification, the solution meets the stated goal, and the answer is Yes. This CapEx-to-OpEx shift is one of the headline financial benefits of cloud adoption highlighted in AZ-900.

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