AZ-900 Practice Test 35 — 15 Questions

Question 1

A company is migrating a custom-built inventory management application to the cloud. The application runs on a specific version of Windows Server and requires custom registry settings that are not supported in a platform as a service (PaaS) offering. The company wants to avoid the overhead of managing physical servers but still needs full control over the operating system and application dependencies. Which cloud service model should the company use?

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

Accepted Answer

Infrastructure as a Service (IaaS). The company needs full control over the operating system and custom registry settings, which are not supported in PaaS. Infrastructure as a Service (IaaS) provides virtualized computing resources (e.g., virtual machines) where the customer manages the OS, applications, and dependencies, while the cloud provider handles the physical hardware. This model allows the company to run a specific version of Windows Server with custom registry configurations without managing physical servers.

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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 2

A financial services company is evaluating a public cloud provider. They are concerned about the shared responsibility model for security. The company must ensure that their customer data is encrypted at rest and in transit. Under the shared responsibility model, which security control is the cloud provider typically responsible for?

Accepted Answer

Physical network security. Under the shared responsibility model, the cloud provider is responsible for the security OF the cloud, which includes physical network security such as protecting the data center perimeter, network infrastructure, and hardware. This is correct because physical security controls (e.g., access badges, surveillance, and network firewalls at the provider's edge) are entirely the provider's domain and cannot be delegated to the customer.

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Encrypting customer data at rest

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Patching virtual machines

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Managing customer access policies

Question 3

A company needs to find all virtual machines that have the tag 'Environment:Production' and were created more than 6 months ago. They want to run a complex query across all subscriptions in their tenant. Which Azure tool should they use?

Accepted Answer

Azure Resource Graph. Azure Resource Graph is the correct tool because it is designed to efficiently query across multiple subscriptions, resource groups, and resource types using the Kusto Query Language (KQL). It can filter virtual machines by the tag 'Environment:Production' and compare the 'createdTime' property to a date six months ago, all in a single, complex query that spans the entire tenant.

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Azure CLI

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Azure PowerShell

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Azure Cost Management

Question 4

A hospital stores patient data in the cloud. They are concerned about physical security at the datacenter. Which aspect of the shared responsibility model describes the cloud provider's obligation to secure the physical infrastructure?

Accepted Answer

Security of physical hardware. In the shared responsibility model, the cloud provider is always responsible for the physical security of the datacenter, including the physical hardware, environmental controls (power, cooling), and physical access controls. This is a foundational principle of the model: the provider secures the physical layer, while the customer secures what they deploy on top of it.

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Security of the network infrastructure

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Security of customer data

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Security of operating systems

Question 5

A company plans to deploy a critical application across multiple physical locations within a single Azure region to ensure that if one datacenter fails, the application remains available. Which Azure feature should they use to distribute virtual machines across these locations?

Accepted Answer

Availability Zone. Availability Zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. By deploying VMs across multiple zones, the application remains available even if one entire datacenter fails, meeting the requirement for fault isolation within a single region.

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Availability Set

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Region Pair

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Resource Group

Question 6

A developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?

Accepted Answer

Azure Functions in Premium plan with VNet integration. Azure Functions in the Premium plan supports VNet integration, allowing the function to securely access resources in a connected on-premises network via a site-to-site VPN without exposing the database to the public internet. The Consumption plan lacks VNet integration, and Azure SQL Database is a PaaS service, not a compute service for running serverless code.

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Azure Functions in Consumption plan

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Azure SQL Database

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Hybrid Connections

Question 7

An Azure administrator needs to review all changes made to Azure resources over the past 90 days, including who made each change and when. Which Azure service provides this information?

Accepted Answer

Azure Activity Log. The Azure Activity Log is a platform log in Azure that provides insight into subscription-level events. It records all control-plane operations (e.g., creating, modifying, or deleting resources) and includes details such as who initiated the operation, what the operation was, and when it occurred. The log retains this data for 90 days by default, making it the correct service for reviewing changes over that period.

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Azure Monitor Metrics

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Azure Resource Health

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Azure Policy compliance reports

Question 8

A company operates on-premises servers that they own. They are considering moving to Azure. Which cloud benefit would MOST directly reduce their total cost of ownership?

Accepted Answer

Eliminating hardware purchase and maintenance costs. Moving to Azure eliminates the need to purchase, maintain, and eventually replace physical servers, which directly reduces capital expenditure (CapEx) and operational costs related to hardware lifecycle management. This is the most direct way to lower total cost of ownership (TCO) when transitioning from on-premises infrastructure to a public cloud model.

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Automatic compliance with all regulations

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Guaranteed zero downtime for all services

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Free support for all Azure services

Question 9

Which Azure service provides a visual designer for building data transformation and movement pipelines between data stores?

Accepted Answer

Azure Data Factory. Azure Data Factory (ADF) is the correct answer because it is a cloud-based ETL and data integration service that provides a visual designer (the ADF authoring canvas) for building data transformation and movement pipelines. These pipelines can copy data between over 90 supported on-premises and cloud data stores, and they can include transformations using mapping data flows or external compute services like Azure HDInsight and Azure Databricks.

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Azure Synapse Analytics Studio

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Azure Databricks

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Azure Stream Analytics

Question 10

A financial services company processes sensitive customer data and must strictly control the physical location of the servers. They want to use cloud computing but with dedicated hardware that is not shared with other customers. Which cloud deployment model should they choose?

Accepted Answer

Private cloud. A private cloud is the correct deployment model because it provides dedicated, single-tenant infrastructure that is not shared with other customers. This ensures that the financial services company can maintain strict physical control over server locations and meet compliance requirements for sensitive customer data, as the hardware is exclusively used by one organization.

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Public cloud

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Hybrid cloud

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Community cloud

Question 11

A company is designing a multi-cloud strategy to avoid dependency on a single provider. They need the ability to move workloads between different cloud providers or back to an on-premises environment with minimal rework. Which cloud characteristic is most essential for this goal?

Accepted Answer

Portability. Portability is the cloud characteristic that enables workloads, data, and applications to be moved across different cloud providers or between cloud and on-premises environments with minimal rework. This is achieved through the use of standardized formats, APIs, and containerization technologies such as Docker and Kubernetes, which abstract underlying infrastructure dependencies. For a multi-cloud strategy aimed at avoiding vendor lock-in, portability is the essential enabler.

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Elasticity

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Scalability

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Fault tolerance

Question 12

A global organization wants to apply a consistent set of Azure policies and RBAC roles across all new subscriptions automatically as they are created. Which Azure capability enables this?

Accepted Answer

Policy inheritance via Management Groups. Management Groups allow you to apply Azure Policy and RBAC role assignments at the management group level, which are inherited by all subscriptions within that group. When a new subscription is created under the management group, it automatically receives those policies and roles, ensuring consistent governance without manual intervention.

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Azure Blueprints deployment

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Azure Policy initiatives

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Subscription tags

Question 13

A company is evaluating cloud service models. They need to migrate an existing application that requires full control over the operating system and custom software installations. They do not want to manage the underlying physical hardware. Which cloud service model best fits this requirement?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines with full control over the guest operating system. This allows the company to install custom software and manage the OS while the cloud provider handles the underlying physical hardware, such as servers, storage, and networking. The requirement for full OS control and custom software installations excludes PaaS and SaaS, which abstract away the OS layer.

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Platform as a Service (PaaS)

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Software as a Service (SaaS)

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On-premises deployment

Question 14

A company uses a public cloud service where they share physical hardware with other customers. This allows the provider to offer low prices due to economies of scale. Which cloud characteristic is being described?

Accepted Answer

Multi-tenancy. Multi-tenancy is the cloud characteristic where a single instance of physical hardware (or software) serves multiple customers (tenants), isolating their data and configurations while sharing underlying resources. This sharing enables the provider to achieve economies of scale, reducing per-customer costs and allowing low prices. The scenario explicitly describes sharing physical hardware with other customers, which is the core definition of multi-tenancy.

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Elasticity

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Scalability

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High availability

Question 15

Which Azure service enables developers to add authentication and authorization to applications without writing the auth code themselves, supporting social identity providers and enterprise identity?

Accepted Answer

Azure Active Directory B2C. Azure Active Directory B2C (Business-to-Consumer) is the correct choice because it is a customer identity access management (CIAM) service specifically designed to enable developers to add authentication and authorization to consumer-facing applications without writing the authentication code themselves. It supports social identity providers (e.g., Google, Facebook, Microsoft) and enterprise identity providers (e.g., Microsoft Entra ID, SAML/WS-Fed), and it handles the entire OAuth 2.0, OpenID Connect, and SAML protocol flow, including token issuance and user sign-up/sign-in policies.

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Azure Active Directory

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Azure Key Vault

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Azure Multi-Factor Authentication