Fundamental
Prepare and test your skills
Fundamental
Prepare and test your skills
Public Cloud Eliminates CapEx and Scales on Demand
Free sample question, answered and explained below. The AZ-900 Microsoft Azure Fundamentals Exam practice bank has 688 more like it. Try 10 free: instant score, no account.
A startup company is planning to deploy a new web application and wants to optimize its operational efficiency. The organization has the following architectural and financial requirements:
- Eliminate upfront capital expenditure (CapEx) associated with purchasing physical server hardware
- Dynamically scale computing capacity up or down to handle fluctuating user demand
- Leverage multitenant physical hardware while maintaining strict logical isolation between tenant workloads
Which cloud deployment model should the company choose?
Explanations
On-premises datacenter
On-premises datacenter
What an On-Premises Datacenter Is
An on-premises datacenter is a traditional hosting model where an organization purchases, installs, configures, and maintains all physical hardware, networking components, power supplies, cooling infrastructure, and software licenses within its own facility.
Why It Doesn't Meet the Requirement
- Heavy Capital Expenditure: Demands substantial upfront CapEx for servers, storage systems, virtualization software, physical facilities, and disaster recovery infrastructure.
- Lack of Elasticity: Adjusting capacity requires ordering, racking, cabling, and configuring physical servers, taking weeks or months instead of scaling instantaneously on demand.
- High Maintenance Overhead: Engineering staff must spend valuable time managing physical hardware failures, firmware updates, and power delivery rather than focusing on software innovation.
Key Characteristics and Limitations
- Single Tenant: Built entirely for the hosting organization without leveraging cloud economies of scale.
- Fixed Capacity Constraints: System sizing must be designed for peak loads, leaving costly computing hardware idle during off-peak periods.
- Direct Responsibility: The business carries full accountability for end-to-end security, facility compliance, and environmental controls.
This Answer Would Be Correct If
An on-premises datacenter would be the right choice if an enterprise had already invested heavily in local infrastructure, operated in an area with limited internet connectivity, or was bound by legacy licensing and legal regulations preventing the use of third-party cloud infrastructure.
Hybrid cloud
Hybrid cloud
What the Hybrid Cloud Is
A hybrid cloud is an architectural model that interconnects a public cloud with a private cloud or an on-premises datacenter, allowing data and applications to be shared and orchestrated across both environments.
Why It Doesn't Meet the Requirement
- Unnecessary Architectural Complexity: The startup does not have existing on-premises systems, making the creation of interconnects (such as site-to-site VPNs or dedicated connections) unnecessarily complex.
- Ongoing On-Premises Costs: Maintaining the private portion of a hybrid environment retains capital expenditure requirements and administrative overhead.
- Over-Engineered for Green-Field Apps: Modern web applications without dependencies on legacy internal systems gain all required scalability and agility directly within a purely public cloud model.
Key Characteristics and Limitations
- Operational Flexibility: Enables organizations to run sensitive data or legacy workloads on-premises while bursting into the public cloud for additional compute capacity.
- Migration Stepping Stone: Commonly used during gradual transitions from local datacenters to cloud environments.
- Multi-Environment Management: Requires consistent governance, identity federation, and tooling across disparate environments.
This Answer Would Be Correct If
A hybrid cloud would be appropriate if the company already had an established on-premises datacenter and needed to maintain specific database workloads locally for regulatory reasons while deploying its public-facing web tier to the cloud.
Public cloud
Public cloud
What the Public Cloud Is
A public cloud is a cloud computing deployment model where computing, storage, and networking resources are owned, operated, and maintained by a third-party cloud service provider (such as Microsoft Azure). Services are delivered over the public internet to multiple organizations and individual customers.
How It Meets the Requirements
- Zero Upfront CapEx: Public cloud services operate on a consumption-based or subscription pricing model, shifting infrastructure costs from capital expenditure (CapEx) to operational expenditure (OpEx). Organizations pay only for the resources they consume.
- Rapid Scalability: Public clouds provide near-infinite capacity that allows applications to scale dynamically in response to real-time traffic spikes or planned seasonal events without manual hardware provisioning.
- Shared Infrastructure with Logical Isolation: In a public cloud, resources are hosted on multitenant infrastructure. The cloud provider enforces robust logical isolation at the hypervisor, network, storage, and identity layers to ensure that customer data remains strictly segregated and secure.
Key Advantages and Capabilities
- Cost-Effectiveness: Eliminates the ongoing expenses of datacenter cooling, electricity, real estate, and physical hardware maintenance.
- High Availability: Built-in redundancy and regional availability ensure business continuity and minimize unplanned downtime.
- Agility and Speed: Developers can provision new compute instances, storage accounts, and databases within minutes rather than waiting weeks for physical procurement.
- Security and Compliance: Public cloud vendors maintain enterprise-grade physical security controls and adhere to global regulatory compliance standards.
Why This Is Optimal
The public cloud is the optimal choice for startups and organizations seeking maximum scalability and low upfront financial commitments. It allows the company to focus development efforts on application logic while offloading physical hardware management and maintenance to the cloud vendor.
Private cloud
Private cloud
What the Private Cloud Is
A private cloud is a cloud computing environment dedicated exclusively to a single organization. The underlying infrastructure can be physically located in the organization's on-premises datacenter or hosted by a third-party provider on dedicated hardware.
Why It Doesn't Meet the Requirement
- Requires Capital Investment: Implementing an on-premises private cloud requires significant CapEx to purchase servers, storage arrays, networking switches, and hypervisor licenses.
- Dedicated Hardware Overhead: Unlike the public cloud's multitenant model, a private cloud relies on single-tenant physical resources, which increases operational overhead and hardware lifecycle management.
- Limited Elastic Scaling: Scaling a private cloud is constrained by the maximum physical capacity of the purchased hardware, making it difficult to scale instantly during unexpected traffic surges.
Key Characteristics and Limitations
- Complete Control: Provides total administrative authority over hardware specifications, network topologies, and physical security boundaries.
- Higher Operational Burden: The organization remains responsible for ongoing maintenance, patch management, hardware refreshes, and facility costs.
- Custom Compliance: Ideal for workloads subject to strict sovereign, regulatory, or legacy architectural constraints that mandate complete physical isolation.
This Answer Would Be Correct If
A private cloud would be the correct solution if the organization required exclusive access to dedicated physical server hardware, complete control over low-level infrastructure configurations, and had strict compliance rules forbidding multitenant resource sharing.
Try 10 interactive questions like this one, free
Answer them yourself and get your score the moment you finish. No account needed.
Full access includes
- 688 practice questions across all 3 exam domains
- Every answer explained: why it is right, and why the others are not
- Scout, an AI tutor that answers your follow-up questions
- Readiness tracking by domain, so you know when to book the exam
Related questions
Keep the momentum going with these hand-picked practice scenarios
FundamentalAZ-900 Microsoft Azure Fundamentals Exam
Microsoft Entra ID, Azure RBAC, Azure Key Vault
Define cloud models, including public, private, and hybrid
FundamentalAZ-900 Microsoft Azure Fundamentals Exam
Shared Responsibility Model
Define cloud models, including public, private, and hybrid
FundamentalAZ-900 Microsoft Azure Fundamentals Exam
Azure ExpressRoute
Define cloud models, including public, private, and hybrid
FundamentalAZ-900 Microsoft Azure Fundamentals Exam
Hybrid Cloud CapEx vs OpEx
Define cloud models, including public, private, and hybrid
FundamentalAZ-900 Microsoft Azure Fundamentals Exam
Azure Dedicated Host
Define cloud models, including public, private, and hybrid
IntermediateAZ-800 Administering Windows Server Hybrid Core Infrastructure Exam
Azure File Sync Event Logs and Azure Monitor
Configure and manage Azure File Sync
Last updated Validated