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

Question 1

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 2

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 3

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 4

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 5

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 6

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 7

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 8

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 9

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. Option C (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 10

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. Option C is correct because 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 11

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.

Question 12

A company can provision virtual machines in Azure without submitting a request or waiting for hardware procurement. Which cloud characteristic does this describe?

Accepted Answer

On-demand self-service. Option C is correct because on-demand self-service allows users to provision virtual machines and other cloud resources automatically without requiring human interaction with the service provider. This eliminates the need for submitting a formal request or waiting for hardware procurement, as the provisioning is handled through a web portal, API, or CLI.

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Rapid elasticity

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Measured service

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Resource pooling

Question 13

A company wants to be able to increase and decrease resources automatically based on demand without manual intervention. Which cloud characteristic does this describe?

Accepted Answer

Rapid elasticity. Rapid elasticity is the cloud characteristic that enables resources to be automatically and dynamically scaled out (increased) or scaled in (decreased) in response to real-time demand, without requiring manual intervention. This is typically implemented through autoscaling policies that monitor metrics like CPU utilization or request count and trigger provisioning or de-provisioning of virtual machines or containers via APIs. The key differentiator is that scaling happens automatically and often in near real-time, matching the elasticity definition in NIST SP 800-145.

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Measured service

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Resource pooling

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On-demand self-service

Question 14

A company uses a public cloud provider that shares the same physical infrastructure among many customers. This allows the provider to offer lower prices due to economies of scale. Which cloud characteristic describes the sharing of infrastructure?

Accepted Answer

Resource pooling. Resource pooling is the cloud characteristic that allows a provider to serve multiple customers from the same physical infrastructure, using multi-tenant models. This sharing enables economies of scale because the provider can amortize hardware costs across many tenants, reducing per-customer pricing. The scenario directly describes multi-tenancy and shared infrastructure, which is the essence of resource pooling.

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Measured service

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Rapid elasticity

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On-demand self-service

Question 15

A company is moving its IT infrastructure to the cloud to avoid large upfront hardware purchases and instead pay a predictable monthly fee. Which cloud benefit does this represent?

Accepted Answer

Consumption-based pricing. Consumption-based pricing is a cloud benefit where customers pay only for the resources they use (e.g., compute hours, storage GBs) rather than making large upfront capital expenditures. This model shifts costs from CapEx to OpEx, enabling predictable monthly billing based on actual consumption. The scenario explicitly describes avoiding upfront hardware purchases and paying a predictable monthly fee, which directly aligns with this pay-as-you-go model.

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High availability

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Elasticity

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Scalability