MS-900 Describe cloud concepts Practice Test 10 — 15 Questions

Question 1

An administrator is reviewing a request from users who need to reduce maintenance of power, cooling, and server replacement. Cloud concept or benefit best matches this requirement?

Accepted Answer

Reduced data center management. The users' requirement to reduce maintenance of power, cooling, and server replacement directly maps to the cloud benefit of reduced data center management. By moving to a cloud model, the cloud provider assumes responsibility for the physical infrastructure, including hardware lifecycle, environmental controls, and facility upkeep, allowing the organization to offload these operational burdens.

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Microsoft Planner

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Data Loss Prevention (DLP)

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Sensitivity labels

Question 2

A tenant administrator is advising a department that wants to keep services available during a hardware failure. Cloud concept or benefit best matches this requirement?

Accepted Answer

High availability. High availability (C) is the correct answer because it directly addresses the requirement to keep services available during a hardware failure. High availability refers to a system's ability to remain operational and accessible despite component failures, typically achieved through redundancy, failover clustering, and load balancing. In Microsoft 365, this is implemented via redundant infrastructure across multiple datacenters and automatic failover mechanisms, ensuring service continuity without manual intervention.

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Microsoft Planner

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Data Loss Prevention (DLP)

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Sensitivity labels

Question 3

During requirements gathering, an IT manager says the organization must compare service models and identify where the customer manages the most layers. Cloud concept or benefit best matches this requirement?

Accepted Answer

Infrastructure as a Service (IaaS). The IT manager's requirement is to identify the service model where the customer manages the most layers. In Infrastructure as a Service (IaaS), the cloud provider manages only the physical infrastructure (servers, storage, networking), while the customer is responsible for managing the operating system, middleware, runtime, data, and applications. This gives the customer the highest degree of control and management responsibility compared to PaaS or SaaS.

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Platform as a Service (PaaS)

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Software as a Service (SaaS)

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Hybrid cloud

Question 4

An administrator is reviewing a request from users who need to avoid overprovisioning for a seasonal workload. Cloud concept or benefit best matches this requirement?

Accepted Answer

Rapid elasticity. Rapid elasticity is a core cloud computing characteristic defined by NIST (SP 800-145) that allows resources to scale out and in automatically based on demand. For a seasonal workload, this means the cloud can provision additional compute or storage capacity during peak periods and release it when demand drops, preventing overprovisioning and optimizing costs.

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Data Loss Prevention (DLP)

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Sensitivity labels

Answer

Microsoft Planner

Question 5

A help desk lead is documenting the correct Microsoft 365 approach to use hosted email without managing mail servers. Cloud concept or benefit best matches this requirement?

Accepted Answer

Software as a Service (SaaS). Microsoft 365's Exchange Online delivers hosted email as a Software as a Service (SaaS) offering. This means Microsoft manages the mail servers, software updates, and infrastructure, while the help desk lead simply configures user mailboxes and policies via the admin center. SaaS is the cloud model where the provider hosts and manages the entire application, aligning perfectly with the requirement to avoid managing mail servers.

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Platform as a Service (PaaS)

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Community cloud

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Infrastructure as a Service (IaaS)

Question 6

During a Microsoft 365 planning workshop, keep a workload on-premises while using Microsoft cloud collaboration services. Cloud concept or benefit best matches this requirement?

Accepted Answer

Hybrid cloud. A hybrid cloud model is the correct answer because it explicitly describes a scenario where an organization keeps certain workloads on-premises while integrating with Microsoft cloud collaboration services like Microsoft 365. This allows for a unified management plane, identity federation via Azure AD Connect, and seamless data synchronization between on-premises infrastructure and cloud services such as Exchange Online, SharePoint Online, or Teams.

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Sensitivity labels

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Microsoft Planner

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Data Loss Prevention (DLP)

Question 7

A service owner is comparing Microsoft 365 capabilities and needs to understand which security tasks Microsoft handles and which remain with the customer. Cloud concept or benefit best matches this requirement?

Accepted Answer

Shared responsibility model. The shared responsibility model defines which security tasks are handled by Microsoft (e.g., physical security, hypervisor patching) and which remain with the customer (e.g., user access management, data classification). This directly matches the service owner's need to understand the division of security responsibilities in Microsoft 365.

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Microsoft Planner

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Data Loss Prevention (DLP)

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Sensitivity labels

Question 8

A company needs a dedicated, private network connection between its on-premises data center and Microsoft's cloud infrastructure to support a hybrid deployment with low latency and high reliability. The connection must not traverse the public internet. Which service should they use?

Accepted Answer

Azure ExpressRoute. Azure ExpressRoute is the correct choice because it provides a dedicated, private network connection from an on-premises data center directly into Microsoft's cloud infrastructure, bypassing the public internet entirely. This ensures low latency, high reliability, and consistent performance for hybrid deployments, as the traffic traverses a private MPLS or Ethernet link rather than the unpredictable internet.

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Azure VPN Gateway

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Azure Virtual WAN

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Microsoft Entra ID Application Proxy

Question 9

A colleague says, 'The public cloud is cheaper because you only pay for the resources you use, like compute hours or storage space.' Which cloud computing characteristic directly supports this pay-as-you-go model?

Accepted Answer

Measured service. Measured service is the cloud computing characteristic that enables a pay-as-you-go model by metering resource usage (e.g., compute hours, storage GB-months, outbound data transfer) and providing transparent billing based on actual consumption. This allows providers like Azure to charge only for what is used, directly supporting the colleague's statement that the public cloud is cheaper because you pay only for resources consumed.

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Rapid elasticity

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Broad network access

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On-demand self-service

Question 10

A company uses a cloud storage service that automatically increases its storage capacity without any manual intervention as new files are added. This behavior is an example of which cloud computing characteristic?

Accepted Answer

Rapid elasticity. The scenario describes storage capacity automatically increasing as new files are added, which is the essence of rapid elasticity. This cloud characteristic allows resources to scale out and in automatically, often to the point where the user perceives unlimited capacity, without requiring manual provisioning or intervention.

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On-demand self-service

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Broad network access

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Resource pooling

Question 11

A company deploys a custom application on a cloud platform where they manage the operating system and runtime environment, but the cloud provider manages the underlying physical infrastructure, storage, and networking. Which cloud service model is being used?

Accepted Answer

Infrastructure as a Service (IaaS). The scenario describes a model where the customer manages the operating system and runtime environment, while the cloud provider handles the physical infrastructure, storage, and networking. This aligns precisely with Infrastructure as a Service (IaaS), as IaaS provides virtualized computing resources (e.g., virtual machines) where the customer retains control over the OS, middleware, and applications, but the provider manages the underlying hardware, hypervisor, and physical network.

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Platform as a Service (PaaS)

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Software as a Service (SaaS)

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Function as a Service (FaaS)

Question 12

A development team uses a cloud service to run applications where the provider manages the runtime environment, operating system, and middleware. The team only writes and uploads code. Which service model are they using?

Accepted Answer

PaaS (Platform as a Service). The scenario describes the team writing and uploading code while the provider manages the runtime environment, operating system, and middleware. This is the defining characteristic of Platform as a Service (PaaS), where the cloud provider abstracts the underlying infrastructure and platform layers, allowing developers to focus solely on application code. In PaaS, the provider handles OS patching, runtime updates, and middleware configuration, which matches the description exactly.

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IaaS (Infrastructure as a Service)

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SaaS (Software as a Service)

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FaaS (Function as a Service)

Question 13

A company uses a cloud service where they pay only for the compute hours their virtual machines run. They can increase or decrease the number of VMs instantly based on demand. Which two cloud computing characteristics are demonstrated? (Choose two.)

Accepted Answer

Rapid elasticity. B is correct because rapid elasticity allows the company to instantly increase or decrease the number of virtual machines based on demand, scaling resources up or down automatically. C is correct because measured service ensures that the company pays only for the compute hours their VMs run, with usage metered and billed accordingly.

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On-demand self-service

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Resource pooling

Question 14

A company is deploying a cloud solution where they have the ability to quickly scale up resources during peak demand and scale down during off-peak hours, paying only for what they use. They also need the provider to automatically manage the underlying platform, including patching the operating system. Which combination of cloud characteristics and service model best describes this scenario?

Accepted Answer

Elasticity and PaaS. The scenario describes elasticity (the ability to scale resources up and down automatically based on demand) and Platform as a Service (PaaS), where the provider manages the underlying platform, including OS patching. Elasticity is a key cloud characteristic that enables dynamic scaling, and PaaS abstracts infrastructure management, aligning perfectly with the requirement for automatic platform maintenance.

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Scalability and IaaS

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Rapid elasticity and SaaS

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Measured service and PaaS

Question 15

A business wants to use a cloud solution where they can scale computing resources up or down automatically based on demand and only pay for what they use. The cloud provider manages the underlying hardware. Which two cloud characteristics are being described? (Choose two.)

Accepted Answer

Elasticity. Elasticity is correct because it describes the ability to automatically scale computing resources up or down based on demand, which is a key characteristic of cloud computing. The scenario explicitly states that resources scale automatically, which aligns with elasticity rather than just the ability to scale (scalability). Measured service is correct because the business pays only for what they use, which is the pay-per-use billing model enabled by metering resource consumption.

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Scalability

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High availability