AZ-900 Practice Test 8 — 10 Questions

Question 1

A company wants to track and manage costs across multiple Azure subscriptions. They have created a hierarchy of management groups: Root -> Department A -> Project 1, Project 2. They want to see the total cost for Department A across all its projects. Which Azure tool should they use?

Accepted Answer

Cost Management + Billing. Cost Management + Billing is the correct tool because it provides consolidated cost tracking and analysis across multiple subscriptions and management groups. By organizing subscriptions under the Department A management group, Cost Management can aggregate costs from Project 1 and Project 2, allowing the company to view the total cost for Department A in a single dashboard or report.

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Azure Policy

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Azure Advisor

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Azure Monitor

Question 2

A hospital stores patient data in the cloud. The hospital is responsible for encrypting the data before uploading, managing user access, and complying with healthcare regulations. The cloud provider is responsible for securing the physical datacenter, network infrastructure, and hypervisor. This model describes which concept?

Accepted Answer

Shared responsibility model. The scenario explicitly divides security responsibilities between the hospital (data encryption, access management, regulatory compliance) and the cloud provider (physical datacenter, network, hypervisor). This division of security obligations is the core definition of the shared responsibility model, which applies across all cloud service models (IaaS, PaaS, SaaS) but is most clearly illustrated here where the customer retains control over data and identity layers.

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Infrastructure as a Service (IaaS)

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Platform as a Service (PaaS)

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Software as a Service (SaaS)

Question 3

A small business runs its IT infrastructure in a small on-premises server room. The business owner is considering moving to Azure and asks the IT manager: 'How can a large cloud provider like Microsoft offer compute and storage at a lower per-unit cost than I can get by purchasing my own servers, even though I only need a few virtual machines?' Which cloud computing benefit best answers this question?

Accepted Answer

Economies of scale. Option C is correct because economies of scale allow Microsoft to spread massive capital and operational costs (data center construction, power, cooling, hardware procurement) across millions of customers. This per-unit cost reduction means even a small business consuming only a few virtual machines benefits from the same low-cost infrastructure that a large enterprise would, making Azure's compute and storage cheaper than purchasing and maintaining dedicated on-premises servers.

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High availability

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Elasticity

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Fault tolerance

Question 4

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 5

A global software company hosts its SaaS product on Azure. Thousands of different customers' virtual machines and databases run on the same physical servers in Microsoft's data centers, yet each customer can only access their own resources and cannot see or interact with other customers' data. Which cloud computing characteristic does this scenario primarily describe?

Accepted Answer

Resource pooling. Resource pooling is the correct answer because the scenario describes a multi-tenant architecture where Microsoft's Azure data centers use a shared physical infrastructure (servers, storage, network) to serve multiple customers. Each customer's VMs and databases are isolated via hypervisor-level virtualization and network segmentation, ensuring they cannot access each other's data. This pooling of resources to serve many customers, with dynamic assignment and reassignment of physical and virtual resources, is the defining characteristic of resource pooling as per the NIST definition of cloud computing.

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Rapid elasticity

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Measured service

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On-demand self-service

Question 6

A company wants to run a containerized application in Azure without managing the underlying virtual machines. Which Azure service should they use?

Accepted Answer

B) Azure Kubernetes Service (AKS). Azure Kubernetes Service (AKS) is a managed container orchestration service that abstracts the underlying virtual machines, allowing you to deploy, scale, and manage containerized applications without having to manage the host infrastructure. AKS handles provisioning, upgrading, and patching of the cluster nodes, so you only interact with the control plane and your workloads.

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A) Azure Virtual Machines

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C) Azure App Service

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D) Azure Functions

Question 7

Company A deploys several Linux virtual machines (VMs) across multiple Azure availability zones in the West US region. The VMs run a cluster application that needs to read and write data concurrently to a shared file system. The solution must support the Server Message Block (SMB) protocol and must be accessible from all zones with low latency. Which Azure storage service should the company use?

Accepted Answer

Azure Files. Azure Files provides fully managed file shares in the cloud that support the SMB protocol, making it the correct choice for a shared file system accessible from multiple Azure availability zones with low latency. It allows concurrent read/write access from Linux VMs across zones, meeting the cluster application's requirements.

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Azure Blob Storage

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Azure Managed Disks

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Azure Queue Storage

Question 8

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 9

A startup wants to avoid managing physical servers and instead focus on developing their application. Which cloud service model provides them with the most control over the operating system and applications while still not managing hardware?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the startup full control over the operating system, storage, and deployed applications without managing the underlying physical hardware. This model is ideal for a startup that wants to avoid hardware maintenance while retaining the flexibility to configure and manage their own OS and application stack.

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Software as a Service (SaaS)

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Platform as a Service (PaaS)

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Functions as a Service (FaaS)

Question 10

An application deployed on Azure Virtual Machines needs to be resilient to failures within a single Azure region. The VMs are placed across multiple physically separate locations within the region, each with independent power, cooling, and networking. What is this feature called?

Accepted Answer

Availability zone. Availability zones are physically separate locations within an Azure region, each with independent power, cooling, and networking. By placing VMs across different zones, you protect your application from a single point of failure within the region, such as a datacenter outage. This is the correct feature for achieving intra-region resilience.

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Availability set

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Region pair

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Resource group