AZ-900 Describe cloud concepts Practice Test 4 — 15 Questions

Question 1

A company wants to move their on-premises infrastructure to the cloud to avoid the large upfront cost of purchasing new servers every three years. In the cloud, they will pay only for the server capacity they use, with no long-term commitment. This shift from upfront investment to variable expense is an example of which cloud benefit?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Consumption-based pricing. Consumption-based pricing is a cloud model where customers pay only for the resources they actually use (e.g., compute hours, storage GBs) with no upfront costs or long-term commitments. This directly matches the scenario of avoiding large upfront server purchases and paying only for capacity used, shifting from a capital expenditure (CapEx) to an operational expenditure (OpEx) model.

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Economies of scale

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Capacity planning

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Reserved capacity

Question 2

A company wants to move from an on-premises data center to Azure. They currently budget for purchasing servers, networking equipment, and software licenses as a one-time capital expense. In Azure, they will pay a monthly fee based on the resources they use. What type of cloud benefit does this represent?

Accepted Answer

Operational expenditure (OpEx). Moving from a capital expense (CapEx) model—where servers, networking gear, and licenses are purchased upfront—to a pay-as-you-go monthly fee in Azure represents a shift to operational expenditure (OpEx). This cloud benefit allows the company to avoid large upfront investments and instead pay for only the compute, storage, and network resources consumed, aligning costs with usage.

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High availability

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Scalability

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Fault tolerance

Question 3

A startup application experiences unpredictable traffic spikes. The application runs on Azure Virtual Machines. They want the VMs to automatically increase in number during peak times and decrease during low usage, without manual intervention. Which cloud characteristic does this requirement describe?

Accepted Answer

Elasticity. Elasticity is the cloud characteristic that enables resources to automatically scale out (increase) during high demand and scale in (decrease) during low demand, matching capacity to workload in real time. In this scenario, Azure Virtual Machines can be configured with autoscale rules (e.g., based on CPU > 75% for 5 minutes) to add or remove VM instances without manual intervention. This directly addresses the startup's need to handle unpredictable traffic spikes while optimizing cost.

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High availability

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Disaster recovery

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Geo-redundancy

Question 4

A company is evaluating cloud providers and needs to ensure that their data remains within a specific geographic boundary due to data sovereignty laws. Which cloud concept is most directly related to this requirement?

Accepted Answer

Region. Azure regions are discrete geographic locations containing one or more datacenters that provide the physical boundary for data residency. By deploying resources within a specific region (e.g., 'West Europe'), an organization ensures that data is stored and processed within that geographic boundary, directly addressing data sovereignty laws. Other concepts like Availability Zones or Latency do not enforce geographic data residency.

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Availability Zone

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Latency

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Compliance

Question 5

A company uses a hybrid cloud model where some workloads run on-premises and some in Azure. They need a consistent identity management system across both environments, allowing single sign-on for users accessing resources in either location. What should they implement?

Accepted Answer

Azure AD Connect. Azure AD Connect is the correct solution because it synchronizes on-premises Active Directory identities with Azure Active Directory, enabling a unified identity management system. This allows users to use the same credentials (single sign-on) to access both on-premises resources and Azure cloud services, fulfilling the hybrid cloud requirement.

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Azure Site Recovery

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Azure VPN Gateway

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Azure Traffic Manager

Question 6

A company wants to replicate its on-premises production environment to Azure for disaster recovery purposes. In the event of an on-premises outage, they can quickly start the replicated environment in Azure. Which cloud benefit does this best describe?

Accepted Answer

Business continuity. This scenario describes business continuity (C), which ensures that an organization can continue operations during and after a disaster. By replicating the on-premises environment to Azure and enabling rapid startup in the event of an outage, the company is implementing a disaster recovery (DR) strategy—a core component of business continuity. Azure Site Recovery (ASR) is the specific service that orchestrates replication, failover, and failback to meet recovery time objectives (RTO) and recovery point objectives (RPO).

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Scalability

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High availability

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Elasticity

Question 7

A company is moving from an on-premises data center to Azure. They previously had to purchase servers, networking gear, and software licenses as upfront capital expenses. In Azure, they pay a monthly fee based on actual usage. Which cloud benefit does this represent?

Accepted Answer

Consumption-based pricing. This scenario describes the shift from upfront capital expenditure (CapEx) for hardware and licenses to a variable operational expenditure (OpEx) model based on actual resource consumption. Azure's consumption-based pricing (also called pay-as-you-go) directly matches this description, as customers are billed only for the compute, storage, and networking resources they use each month, with no upfront commitment or sunk cost for idle capacity.

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High availability

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Scalability

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Disaster recovery

Question 8

A company needs to burst compute capacity during a seasonal sale event. They plan to use Azure virtual machines to handle the extra load and then release them after the event. They want to pay only for the extra resources used during that period. Which cloud characteristic best describes this?

Accepted Answer

Elasticity. Elasticity is the cloud characteristic that allows resources to automatically scale up to meet increased demand and scale down when demand decreases, ensuring you only pay for what you use. In this scenario, the company needs to burst compute capacity for a seasonal sale event and then release the VMs afterward, which is a textbook example of elasticity. This contrasts with other characteristics like high availability or geo-redundancy, which focus on uptime and data replication rather than dynamic scaling.

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High availability

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Geo-redundancy

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Agility

Question 9

A company wants to move their on-premises data center to Azure to take advantage of the ability to quickly provision new environments for development and testing on demand, reducing time-to-market. Which cloud benefit is this an example of?

Accepted Answer

Agility. Agility refers to the ability to rapidly provision and de-provision resources as needed, which directly aligns with the scenario of quickly creating new development and test environments on demand. In Azure, this is enabled by Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) offerings, allowing teams to spin up virtual machines, databases, and networks in minutes using Azure Resource Manager (ARM) templates or the Azure portal. This reduces time-to-market by eliminating the procurement and setup delays typical of on-premises data centers.

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Scalability

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Reliability

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Security

Question 10

A company is evaluating cloud deployment models. They need to keep sensitive data on-premises due to regulations but want to use Azure for development and testing workloads. Which cloud deployment model is most suitable?

Accepted Answer

Hybrid cloud. A hybrid cloud deployment model is most suitable because it combines on-premises infrastructure (private cloud) with public cloud services like Azure. This allows the company to keep sensitive data on-premises to meet regulatory compliance while leveraging Azure for development and testing workloads, which do not have the same data residency constraints.

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Public cloud

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Private cloud

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Community cloud

Question 11

A company wants to ensure that their cloud provider's physical data centers are located in specific geographic areas to comply with data residency requirements. Which cloud concept is this related to?

Accepted Answer

Data sovereignty. Data sovereignty is the concept that data is subject to the laws and regulations of the country or region where it is physically stored. By ensuring their cloud provider's data centers are located in specific geographic areas, the company is directly addressing data sovereignty requirements to comply with local data residency laws, such as GDPR in Europe or the Personal Information Protection and Electronic Documents Act (PIPEDA) in Canada.

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Availability

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Disaster recovery

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Hybrid cloud

Question 12

A company wants to move its on-premises applications to the cloud to benefit from the ability to quickly scale resources up or down based on demand. They want to pay only for what they use. This combination of characteristics is known as:

Accepted Answer

Elasticity. Elasticity is the correct term because it describes the ability to automatically scale computing resources up or down based on demand, combined with a pay-as-you-go pricing model. This allows the company to only pay for the resources they actually use, which is a core benefit of cloud computing.

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High availability

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Fault tolerance

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Disaster recovery

Question 13

A company is considering moving its on-premises workloads to Azure. The CFO wants to understand how Azure pricing works. Which pricing model allows them to pay only for what they use, with no upfront costs or termination fees?

Accepted Answer

Pay-as-you-go. (Pay-as-you-go) is correct because it is the Azure pricing model that charges customers only for the resources they consume, with no upfront commitment or termination fees. This model provides maximum flexibility, allowing the company to scale usage up or down as needed without financial penalties, directly addressing the CFO's requirement for a usage-based cost structure.

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Reserved instances

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Spot VMs

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Hybrid Benefit

Question 14

A company wants to use cloud services to quickly spin up a test environment for a new application, use it for a week, and then delete it. They want to minimize costs by only paying for the compute resources during that week. This scenario best describes which cloud characteristic?

Accepted Answer

Self-service. Self-service in cloud computing allows users to provision and de-provision resources (like compute instances) on demand without manual intervention from the cloud provider. In this scenario, the company can spin up a test environment, use it for a week, and delete it, paying only for the compute resources consumed during that period, which aligns with the self-service characteristic where users manage their own resources via a web portal or API.

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Rapid elasticity

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Measured service

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Resource pooling

Question 15

A company is moving to the cloud to achieve economies of scale. Which of the following best describes how cloud computing enables economies of scale?

Accepted Answer

Cloud providers purchase large quantities of hardware, reducing per-unit costs, which are passed to customers.. Economies of scale in cloud computing are achieved because providers like AWS, Microsoft Azure, or Google Cloud purchase hardware (servers, networking gear, storage) in massive volumes, negotiating lower per-unit costs from vendors. These savings are passed to customers via lower pay-as-you-go prices, making cloud services cheaper than what an individual company would pay for equivalent on-premises infrastructure.

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Customers can reserve resources in advance for a discount.

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Multiple customers share the same physical hardware, reducing security.

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Customers only pay for resources they use, reducing waste.