AZ-900 Practice Test 5 — 10 Questions

Question 1

A company uses Azure for its infrastructure. A developer needs a new virtual machine to test a feature. The developer goes to the Azure portal, selects an image, and provisions the VM within minutes without any interaction with the IT procurement department. This capability directly demonstrates which essential characteristic of cloud computing as defined by NIST?

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

Accepted Answer

On-demand self-service. The scenario describes a developer provisioning a virtual machine directly through the Azure portal without needing to submit a request or obtain approval from IT procurement. This aligns with the NIST definition of on-demand self-service, which states that a consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider. The key enabler here is the self-service portal (Azure portal) that allows the developer to select an image and deploy the VM instantly, bypassing any manual approval workflow.

Answer

Rapid elasticity

Answer

Measured service

Answer

Resource pooling

Question 2

A cloud provider uses virtualization technology to host multiple customers on the same physical server. Each customer's data, applications, and operating systems are logically isolated and secured from one another. Which characteristic of cloud computing does this scenario best describe?

Accepted Answer

Resource pooling. This scenario describes resource pooling, where the provider's computing resources (such as storage, memory, and network bandwidth) are pooled to serve multiple customers using a multi-tenant model. Virtualization technology creates isolated virtual machines for each tenant, ensuring logical separation of data and applications while sharing the same physical hardware. This is a core characteristic of cloud computing as defined by NIST SP 800-145.

Answer

Rapid elasticity

Answer

Measured service

Answer

On-demand self-service

Question 3

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.

Answer

Azure Policy

Answer

Azure Advisor

Answer

Azure Monitor

Question 4

Which cloud benefit helps organizations meet workload demands during unexpected events like viral marketing campaigns without service degradation?

Accepted Answer

Elasticity. Elasticity is the correct answer because it refers to the ability of a cloud system to automatically provision and de-provision resources (such as compute instances, storage, or bandwidth) in real time to match fluctuating demand. During a viral marketing campaign, traffic spikes can be handled by scaling out resources dynamically, ensuring consistent performance without manual intervention or service degradation.

Answer

High availability

Answer

Security

Answer

Predictability

Question 5

A company runs an e-commerce web application on a set of Azure virtual machines behind a load balancer. The application experiences unpredictable traffic surges during flash sales. The company configures an autoscale setting that automatically adds virtual machines when the average CPU usage across the existing VMs exceeds 75% for five minutes, and removes virtual machines when CPU usage drops below 30% for ten minutes. Which essential characteristic of cloud computing does this configuration primarily demonstrate?

Accepted Answer

Rapid elasticity. B is correct because the autoscale configuration dynamically adds and removes virtual machines in response to real-time CPU usage thresholds, which is the defining characteristic of rapid elasticity. This allows the e-commerce application to scale computing resources up and down automatically and seamlessly to match unpredictable traffic surges, ensuring performance during flash sales without manual intervention.

Answer

Measured service

Answer

Resource pooling

Answer

Broad network access

Question 6

A development team needs to quickly provision a new virtual machine for a short-term testing environment. The team uses the Azure portal to create the VM without submitting a request to the IT operations team or waiting for any manual approval. The VM is provisioned and available within minutes. Which cloud computing characteristic does this scenario best represent?

Accepted Answer

On-demand self-service. The scenario describes the development team provisioning a virtual machine directly through the Azure portal without any manual approval or intervention from IT operations. This is the essence of on-demand self-service, a core cloud computing characteristic defined by NIST SP 800-145, where a consumer can unilaterally provision computing capabilities as needed automatically without requiring human interaction with each service provider.

Answer

Rapid elasticity

Answer

Measured service

Answer

Resource pooling

Question 7

What is Microsoft's definition of 'cloud computing' as used in the context of Azure?

Accepted Answer

Delivery of computing services over the internet with flexible, pay-as-you-go pricing. Microsoft defines cloud computing as the delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the internet (the cloud) with flexible, pay-as-you-go pricing. This definition is foundational to Azure, enabling customers to scale resources up or down as needed and only pay for what they use, rather than investing in and maintaining physical infrastructure.

Answer

Storing all data on physical servers in the customer's own building

Answer

Using only virtual machines in a third-party data center

Answer

A type of software that runs in web browsers without installation

Question 8

What does 'disaster recovery' mean in cloud computing, and how does Azure support it?

Accepted Answer

The ability to restore systems and data after a major outage, supported by services like Azure Site Recovery. Disaster recovery (DR) in cloud computing refers to the strategies and processes used to restore IT systems and data after a catastrophic failure, such as a natural disaster or large-scale outage. Azure supports DR primarily through Azure Site Recovery (ASR), which orchestrates replication, failover, and failback of virtual machines and workloads between Azure regions or from on-premises to Azure, ensuring business continuity with defined recovery point objectives (RPO) and recovery time objectives (RTO).

Answer

Disaster recovery means the cloud never experiences any failures

Answer

Disaster recovery is only relevant for on-premises systems

Answer

Azure automatically protects all data with no configuration required

Question 9

A company is migrating its on-premises infrastructure to Azure. In the past, to provision a new server, the IT team had to submit a formal request to the data center operations team. The operations team would then procure hardware, install the operating system, configure networking, and make the server available. This process often took several weeks. After migrating to Azure, a developer can log into the Azure portal, select a virtual machine configuration, and have it provisioned and running within minutes, without any need to interact with Azure support or operations staff. Which essential characteristic of cloud computing does this scenario best illustrate?

Accepted Answer

On-demand self-service. The scenario describes a developer provisioning a virtual machine directly through the Azure portal without any human intervention from IT or operations staff. This aligns with the cloud characteristic of on-demand self-service, where users can provision and manage computing resources as needed automatically, without requiring manual approval or interaction with service providers.

Answer

Rapid elasticity

Answer

Resource pooling

Answer

Measured service

Question 10

Which Azure compute service lets you run containers without managing any virtual machine infrastructure, paying only for CPU and memory used while the container runs?

Accepted Answer

Azure Container Instances. Azure Container Instances (ACI) is a serverless container service that allows you to run containers directly on Azure without provisioning or managing any underlying virtual machines. You are billed per second based on the CPU and memory resources consumed while the container is running, making it ideal for burst or short-lived workloads.

Answer

Azure Kubernetes Service

Answer

Azure App Service

Answer

Azure Batch