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AZ-900 · Practice set 4 of 5

Cloud Models and Use Cases: 10 practice questions

10 questions · Untimed · Free

10 free AZ-900 practice questions on Cloud Models and Use Cases, with an explanation for every answer. Untimed. The full mock exam and the timed version are in the app.

Set 4 · Cloud Models and Use Cases · 10 questions Read the lesson

  1. Question 1 of 10

    Which statement defines a public cloud?

    1. AAn organization interconnects public and private cloud environments.
    2. BA third-party provider builds and operates cloud resources that are generally available for customers to purchase and use.
    3. CA single entity uses resources dedicated to that organization.
    4. DAn organization maintains hardware in its dedicated on-site datacenter.
    Show the answer

    Look at who can buy the resources. A public cloud is defined by general availability, where a third-party provider builds, operates, and sells access to anyone who wants to purchase services. It is not defined by size or location, but by whether the environment is open to the public rather than reserved for one entity.

    Next → 1 / 10

  2. Question 2 of 10

    What characterizes the private deployment model?

    1. AAnyone who wants to purchase services can access the provider's cloud resources.
    2. BA single entity uses a cloud environment with resources dedicated to one organization.
    3. CAn organization connects a provider's public environment to its private environment.
    4. DSeveral organizations share generally available resources maintained by a cloud provider.
    Show the answer

    Exclusivity separates private cloud from every other model. In a private cloud, resources remain dedicated to one single organization rather than being offered for general sale. Location does not define it: whether hosted in an on-site datacenter or by a third party off-site, the environment serves only one tenant.

    Next → 2 / 10

  3. Question 3 of 10

    What makes a cloud deployment hybrid?

    1. AIt uses public and private clouds in an interconnected environment.
    2. BIt consists entirely of resources dedicated to one organization.
    3. CIt consists entirely of generally available third-party resources.
    4. DIt requires the organization to run every resource in its on-site datacenter.
    Show the answer

    Check whether both deployment models are present and linked. A hybrid cloud requires both a public cloud and a private cloud working together in an interconnected environment. If either environment is missing, or if an organization runs two separate clouds that never connect, the deployment cannot be classified as hybrid.

    Next → 3 / 10

  4. Question 4 of 10

    Which requirement is an appropriate reason to select public cloud?

    1. AMaintain complete control over resources and prevent data collocation with other tenants.
    2. BProvision and deprovision applications quickly without capital expenditure for scaling.
    3. CInterconnect an existing private environment with public resources for temporary demand.
    4. DKeep resources dedicated to one entity and purchase the supporting hardware.
    Show the answer

    Target the financial and operational tradeoffs of infrastructure. Public cloud allows you to provision and deprovision applications quickly while scaling up without capital expenditure for physical hardware. You pay only for what you use, making it ideal when fast deployment and operational flexibility matter more than owning the hardware or having complete control.

    Next → 4 / 10

  5. Question 5 of 10

    A company accepts hardware purchase and maintenance in exchange for dedicated resources and greater security control. Which model fits these priorities?

    1. AHybrid cloud with placement across public and private environments
    2. BPublic cloud with scaling that avoids capital expenditure
    3. CPublic cloud with resources generally available to purchasers
    4. DPrivate cloud with resources dedicated to the company
    Show the answer

    Look for the tradeoff between control and cost. Dedicated resources and greater control fit private cloud when you accept buying and maintaining hardware. Public cloud can scale without capital expenditure for additional infrastructure, but you give up complete control. Hybrid cloud requires connected public and private environments.

    Next → 5 / 10

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  7. Question 6 of 10

    An organization wants to choose which services remain private and which run in public cloud to address compliance requirements. Which model fits?

    1. APrivate cloud, because it includes generally available public resources by definition
    2. BPublic cloud, because it keeps every service on hardware dedicated to one entity
    3. CHybrid cloud, because it supports deliberate placement across connected environments
    4. DPublic cloud, because it gives the organization complete control over all resources
    Show the answer

    Look for the split between environments. When an organization must decide where applications live, such as keeping regulated data private while hosting other services publicly, it needs hybrid cloud. That placement flexibility allows compliance control across interconnected public and private clouds, whereas choosing either public or private alone eliminates the ability to separate workloads across both models.

    Next → 6 / 10

  8. Question 7 of 10

    Which cloud model can let a private cloud handle increased temporary demand by deploying public-cloud resources?

    1. APrivate cloud isolated in a dedicated off-site datacenter
    2. BPrivate cloud operating without any public resources
    3. CHybrid cloud connecting private capacity to temporary public resources
    4. DPublic cloud operating without any private resources
    Show the answer

    Focus on the surge requirement and temporary capacity. When a private cloud handles a temporary spike in demand by deploying public-cloud resources, both environments participate in an interconnected design. That surge capability defines a hybrid cloud use case. It keeps the private environment intact while adding public resources until the spike passes.

    Next → 7 / 10

  9. Question 8 of 10

    A new application needs provider-operated resources that can be provisioned and removed quickly. The organization has no requirement for dedicated private resources and wants to scale without buying hardware. Which model should it select?

    1. APrivate cloud, purchasing dedicated hardware to gain complete infrastructure control
    2. BPublic cloud, using generally available resources without capital expenditure for scaling
    3. CPrivate cloud, hosting dedicated resources on-site and maintaining the hardware
    4. DHybrid cloud, retaining a private environment and connecting public resources to it
    Show the answer

    The decisive clues are provider-operated resources, quick provisioning, and scaling without buying hardware. Public cloud fits that combination because it can scale without capital expenditure for additional infrastructure. Dedicated private resources are not required here, and no need to connect public and private environments is given.

    Next → 8 / 10

  10. Question 9 of 10

    A company requires resources dedicated to that company and does not want its data collocated with other tenants' data. It accepts hardware costs but asks a third party to host the dedicated environment off-site. Which model is this?

    1. APublic cloud, because third-party hosting makes the resources generally available
    2. BPublic cloud, because dedicated resources eliminate the private-cloud hardware responsibility
    3. CPrivate cloud, because dedicated off-site hosting can still serve one entity
    4. DHybrid cloud, because every off-site environment includes a public cloud component
    Show the answer

    Focus on who can use the resources, rather than who hosts them. A private cloud serves one organization with dedicated resources, even in a dedicated off-site datacenter run by a third party. That setup can also keep the organization's data from being collocated with other tenants' data.

    Next → 9 / 10

  11. Question 10 of 10

    An organization keeps a regulated application in its private cloud. During a short demand spike, it wants to add connected public-cloud capacity without abandoning the private environment. Which model should the architect choose?

    1. AHybrid cloud, extending the private environment with temporary public resources
    2. BPublic cloud, replacing the private environment with provider-operated capacity
    3. CPrivate cloud, handling the spike without deploying any connected public resources
    4. DPublic cloud, moving the regulated application entirely to generally available resources
    Show the answer

    Identify the temporary surge pattern across both environments. The architect must preserve the private cloud for the regulated application while adding connected public capacity to handle the short spike. Because neither environment is abandoned and both work together, the design is hybrid cloud. Shifting everything to public cloud or absorbing the surge inside private capacity alone would eliminate one environment.

    Next → 10 / 10

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