AZ-900 · Practice set 4 of 5
Cloud Models and Use Cases: 10 practice questions
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.
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Question 1 of 10
Which statement defines a public cloud?
- AAn organization interconnects public and private cloud environments.
- BA third-party cloud provider builds, controls, and maintains the environment.
- CA single entity uses resources dedicated to that organization.
- DAn organization maintains hardware in its dedicated on-site datacenter.
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Provider operation and general availability for purchase identify public cloud; dedicated single-entity resources identify private cloud, while interconnected public and private environments identify hybrid cloud.
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Question 2 of 10
What characterizes the private deployment model?
- AAnyone who wants to purchase services can access the provider's cloud resources.
- BA single entity uses a cloud environment with resources dedicated to one organization.
- CAn organization connects a provider's public environment to its private environment.
- DSeveral organizations share generally available resources maintained by a cloud provider.
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Single-entity use and dedicated resources distinguish private cloud from generally available public resources and from a hybrid combination of public and private clouds.
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Question 3 of 10
What makes a cloud deployment hybrid?
- AIt uses public and private clouds in an interconnected environment.
- BIt consists entirely of resources dedicated to one organization.
- CIt consists entirely of generally available third-party resources.
- DIt requires the organization to run every resource in its on-site datacenter.
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Hybrid cloud is defined by the interconnected use of both public and private clouds; either environment on its own represents a different deployment model.
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Question 4 of 10
Which requirement is an appropriate reason to select public cloud?
- AMaintain complete control over resources and prevent data collocation with other tenants.
- BProvision and deprovision applications quickly without capital expenditure for scaling.
- CInterconnect an existing private environment with public resources for temporary demand.
- DKeep resources dedicated to one entity and purchase the supporting hardware.
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Quick provisioning and scaling without capital expenditure are public-cloud advantages; dedicated control belongs to private cloud, while joining private and public capacity is hybrid.
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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?
- AHybrid cloud with placement across public and private environments
- BPublic cloud with scaling that avoids capital expenditure
- CPublic cloud with resources generally available to purchasers
- DPrivate cloud with resources dedicated to the company
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Dedicated resources and greater control favor private cloud, with greater cost and hardware responsibility as tradeoffs; general availability favors public cloud, and mixed placement favors hybrid.
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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?
- APrivate cloud, because it includes generally available public resources by definition
- BPublic cloud, because it keeps every service on hardware dedicated to one entity
- CHybrid cloud, because it supports deliberate placement across connected environments
- DPublic cloud, because it gives the organization complete control over all resources
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Hybrid cloud lets the organization decide where services run across interconnected public and private environments, including placement driven by compliance; neither model alone supplies that split.
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Question 7 of 10
Which cloud model can let a private cloud handle increased temporary demand by deploying public-cloud resources?
- APrivate cloud isolated in a dedicated off-site datacenter
- BPrivate cloud operating without any public resources
- CHybrid cloud connecting private capacity to temporary public resources
- DPublic cloud operating without any private resources
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Temporary expansion from private capacity into public resources is a documented hybrid-cloud use case because both environments participate in the design.
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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?
- APrivate cloud, purchasing dedicated hardware to gain complete infrastructure control
- BPublic cloud, using generally available resources without capital expenditure for scaling
- CPrivate cloud, hosting dedicated resources on-site and maintaining the hardware
- DHybrid cloud, retaining a private environment and connecting public resources to it
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The scenario matches public cloud through third-party operation, rapid provisioning, and scaling without capital expenditure; it supplies no private environment that would justify private or hybrid deployment.
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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?
- APublic cloud, because third-party hosting makes the resources generally available
- BPublic cloud, because dedicated resources eliminate the private-cloud hardware responsibility
- CPrivate cloud, because dedicated off-site hosting can still serve one entity
- DHybrid cloud, because every off-site environment includes a public cloud component
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Private cloud is defined by single-entity use and dedicated resources, not by an on-site location; a third party may host it in a dedicated off-site datacenter.
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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?
- AHybrid cloud, extending the private environment with temporary public resources
- BPublic cloud, replacing the private environment with provider-operated capacity
- CPrivate cloud, handling the spike without deploying any connected public resources
- DPublic cloud, moving the regulated application entirely to generally available resources
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A private cloud that surges into connected public resources for increased temporary demand is a hybrid-cloud pattern; public-only or private-only choices remove one required environment.
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