Microsoft Azure Fundamentals (AZ-900) Exam Prep 2026

1. Pregunta 1 de 20

   What is cloud computing?

   • AKeeping backup copies of company files on portable USB drives
   • BDelivering computing services over the internet
   • CA high-speed type of internet connection for homes and offices
   • DBuying your own servers and running them in a building you manage
   Ver respuesta

   Respuesta: B. Delivering computing services over the internet

   Cloud computing is the delivery of computing services, such as virtual machines, storage, databases and networking, over the internet.

2. Pregunta 2 de 20

   Which of these is a common example of software as a service (SaaS)?

   • AA private datacentre that your company owns and runs
   • BA virtual machine where you install your own operating system
   • CA platform where developers deploy and run their own code
   • DAn email and calendar service that staff simply sign in to
   Ver respuesta

   Respuesta: D. An email and calendar service that staff simply sign in to

   SaaS is a complete, ready-to-use application. Email, messaging and productivity apps are common SaaS examples.

3. Pregunta 3 de 20

   What makes a cloud a public cloud?

   • AOnly one organization uses it, and nobody else can
   • BIt is free for anyone to use without an account
   • CA third-party provider runs it, and anyone can buy its services
   • DIt runs only on servers inside your own office building
   Ver respuesta

   Respuesta: C. A third-party provider runs it, and anyone can buy its services

   A public cloud is built, controlled and maintained by a third-party provider. Its general availability to anyone who wants to buy services is the key difference from a private cloud.

4. Pregunta 4 de 20

   Which statement describes a private cloud?

   • AIt always combines two or more public cloud providers
   • BOne organization uses it, with more control but higher cost
   • CThe cloud provider is responsible for all of its hardware costs
   • DAnyone who pays for cloud services can share it
   Ver respuesta

   Respuesta: B. One organization uses it, with more control but higher cost

   A private cloud is used by a single organization. It gives more control, but it costs more and you buy and maintain the hardware.

5. Pregunta 5 de 20

   How is spending on cloud services usually classified?

   • AAs a fixed yearly fee that does not change with use
   • BAs a one-time expense paid when the account is opened
   • CAs a capital expense (CapEx) paid up front for hardware
   • DAs an operational expense (OpEx)
   Ver respuesta

   Respuesta: D. As an operational expense (OpEx)

   You pay for cloud services as you use them, so cloud computing is an operational expense. CapEx is up-front spending on physical things such as servers.

6. Pregunta 6 de 20

   Which is a benefit of the consumption-based model?

   • AYou become the owner of the physical servers that you use
   • BYou pay the same amount whether or not you use the resources
   • CYou can release resources when demand drops and stop paying for them
   • DYou must buy enough servers for your busiest day in advance
   Ver respuesta

   Respuesta: C. You can release resources when demand drops and stop paying for them

   In the consumption-based model you pay only for what you use. You can add resources when demand rises and release them when it drops.

7. Pregunta 7 de 20

   Where does Microsoft write down the uptime guarantee for an Azure service?

   • AIn the Azure pricing calculator
   • BIn the Azure Marketplace listing for the service
   • CIn the tags on each resource group
   • DIn the service's SLA
   Ver respuesta

   Respuesta: D. In the service's SLA

   Azure's uptime guarantees depend on the service and are part of its service-level agreement (SLA).

8. Pregunta 8 de 20

   An app's virtual machine is too slow, so you give it more CPUs and RAM. What type of scaling is this?

   • AVertical scaling (scaling up)
   • BHorizontal scaling (scaling in)
   • CMoving from a public cloud to a hybrid cloud
   • DHorizontal scaling (scaling out)
   Ver respuesta

   Respuesta: A. Vertical scaling (scaling up)

   Vertical scaling changes the size of a resource, such as adding CPUs or RAM to a VM. Horizontal scaling changes the number of resources.

9. Pregunta 9 de 20

   During a sale, an online store adds four extra virtual machines, then removes them when the sale ends. What is this?

   • AA change from operational to capital expense
   • BHorizontal scaling: out, then back in
   • CVertical scaling: scaling up and then scaling down
   • DA change from a public cloud to a private cloud
   Ver respuesta

   Respuesta: B. Horizontal scaling: out, then back in

   Horizontal scaling adds or removes resources, such as VMs. Adding them is scaling out; removing them is scaling in.

10. Pregunta 10 de 20

    In the shared responsibility model, what is ALWAYS the cloud provider's responsibility?

    • AThe phones and computers allowed to connect to your cloud
    • BThe user accounts and identities in your organization
    • CThe physical datacentre, network and hosts
    • DThe data and information that you store in the cloud
    Ver respuesta

    Respuesta: C. The physical datacentre, network and hosts

    The provider is always responsible for the physical datacentre, physical network and physical hosts. Your data, devices, accounts and identities always stay with you.

11. Pregunta 11 de 20

    Which responsibility always stays with the customer, whether the service is IaaS, PaaS or SaaS?

    • APower and cooling for the datacentre
    • BReplacing physical hosts that fail
    • CPhysical security of the server racks
    • DThe information and data stored in the cloud
    Ver respuesta

    Respuesta: D. The information and data stored in the cloud

    You are always responsible for your data, the devices allowed to connect, and your accounts and identities. Physical items belong to the provider.

12. Pregunta 12 de 20

    Which cloud service type places the most responsibility on the customer?

    • APlatform as a service (PaaS)
    • BAll three types place equal responsibility on the customer
    • CInfrastructure as a service (IaaS)
    • DSoftware as a service (SaaS)
    Ver respuesta

    Respuesta: C. Infrastructure as a service (IaaS)

    IaaS puts the most responsibility on the customer, SaaS puts most of it on the provider, and PaaS sits in the middle.

13. Pregunta 13 de 20

    A company keeps sensitive records in its own private cloud but adds Azure resources during its busy season. Which cloud model is this?

    • AMulticloud
    • BPrivate cloud only
    • CHybrid cloud
    • DPublic cloud only
    Ver respuesta

    Respuesta: C. Hybrid cloud

    A hybrid cloud connects public and private clouds. A private cloud can surge into the public cloud for temporary extra demand.

14. Pregunta 14 de 20

    A company uses services from two different public cloud providers. Which cloud model is this?

    • AHybrid cloud
    • BMulticloud
    • CPrivate cloud
    • DSoftware as a service
    Ver respuesta

    Respuesta: B. Multicloud

    In a multicloud scenario you use two or more public cloud providers and manage resources and security in each.

15. Pregunta 15 de 20

    A company wants to move its existing servers to the cloud quickly, with as few changes as possible. Which service type fits best?

    • ASaaS, by buying a finished application instead
    • BA private cloud built in a new office
    • CIaaS
    • DPaaS, by rewriting the apps for a managed platform
    Ver respuesta

    Respuesta: C. IaaS

    Lift-and-shift migration is a common IaaS scenario: you set up cloud resources like your on-premises servers and move the workloads.

16. Pregunta 16 de 20

    Developers want to build and run apps without installing, licensing or patching operating systems and databases. Which service type fits best?

    • AInfrastructure as a service (IaaS)
    • BAn on-premises datacentre
    • CA Spot Virtual Machine
    • DPlatform as a service (PaaS)
    Ver respuesta

    Respuesta: D. Platform as a service (PaaS)

    In PaaS the provider maintains the operating systems, middleware and development tools, so you don't license or patch the OS or database.

17. Pregunta 17 de 20

    What does reliability mean in cloud computing?

    • AA system's ability to recover from failures and keep working
    • BThe ability to sign in once and use many applications
    • CThe ability to add more CPUs and RAM to a virtual machine
    • DThe ability to estimate next month's cloud bill accurately
    Ver respuesta

    Respuesta: A. A system's ability to recover from failures and keep working

    Reliability is the ability of a system to recover from failures and continue to function. It is a pillar of the Azure Well-Architected Framework.

18. Pregunta 18 de 20

    Which statement best describes serverless computing with Azure Functions?

    • AYou install and patch the operating system yourself
    • BAn event runs your code and you don't maintain any VMs
    • CYou rent a whole physical server that runs all day
    • DYou pay a fixed monthly price even when no events occur
    Ver respuesta

    Respuesta: B. An event runs your code and you don't maintain any VMs

    Azure Functions is event-driven and serverless. You don't maintain VMs or containers, and Azure charges only for the CPU time used while the function runs.

19. Pregunta 19 de 20

    A company will run the same database VMs for the next three years. Which pricing option lowers the cost by committing to those specific resources?

    • AReservations
    • BSpot Virtual Machines
    • CPay-as-you-go
    • DThe Azure free account
    Ver respuesta

    Respuesta: A. Reservations

    With reservations you commit to specific resources, such as VMs, databases or storage, for one or three years to reduce cost.

20. Pregunta 20 de 20

    A team runs a nightly batch job that can simply restart if it is stopped. Which option uses unused Azure capacity at a lower price?

    • AAzure Virtual Desktop
    • BPremium block blob storage
    • CReservations for three years
    • DSpot Virtual Machines
    Ver respuesta

    Respuesta: D. Spot Virtual Machines

    Spot pricing uses unused Azure capacity at lower prices, but Azure can evict the VM when it needs the capacity back, so it suits work that can be interrupted.

Teclado: 1–4 para responder, Intro para la siguiente pregunta.

El examen real: 700 or greater (scale of 1 to 1,000)