AZ-900 Practice Test 49 — 15 Questions

Question 1

Which Azure service provides a hybrid cloud solution that enables running Azure services in on-premises data centers?

Accepted Answer

Azure Stack. Azure Stack is a hybrid cloud solution that extends Azure services and capabilities to on-premises environments. It allows organizations to run Azure compute, storage, and networking services in their own data centers, providing consistency with the public Azure cloud for workloads that require low latency, data residency, or offline operation.

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Azure ExpressRoute

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Azure Arc

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Azure Hybrid Benefit

Question 2

A retail company runs its e-commerce platform on a public cloud. During a major sale event, they want to ensure that the application remains accessible even if an entire data center fails. Which cloud computing concept does this describe?

Accepted Answer

High availability. High availability ensures that the application remains accessible even if an entire data center fails, typically through redundant infrastructure across multiple availability zones. This is achieved by deploying the application in a load-balanced, multi-AZ configuration that automatically fails over to healthy instances, maintaining uptime despite a complete data center outage.

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Scalability

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Elasticity

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Disaster recovery

Question 3

A startup wants to quickly deploy a web application without worrying about server maintenance. They only want to focus on writing code and deploying it. Which cloud service model best fits this requirement?

Accepted Answer

B) Platform as a Service (PaaS). Platform as a Service (PaaS) provides a managed hosting environment where the cloud provider handles the underlying infrastructure (servers, storage, networking, OS patches) while the customer focuses solely on deploying and managing their own code and data. This directly matches the startup's requirement to avoid server maintenance and concentrate on writing and deploying code.

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A) Infrastructure as a Service (IaaS)

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C) Software as a Service (SaaS)

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D) Functions as a Service (FaaS)

Question 4

What is the primary purpose of Azure Virtual Network (VNet)?

Accepted Answer

To provide a private, isolated network for Azure resources. Azure Virtual Network (VNet) enables Azure resources, such as VMs and App Services, to securely communicate with each other, the internet, and on-premises networks. It provides network isolation and segmentation, allowing you to define private IP address spaces, subnets, and routing rules. This makes B the correct answer because the primary purpose of a VNet is to create a private, isolated network environment in the cloud.

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To provide identity and access management for Azure resources

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To distribute traffic across multiple Azure regions

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To store and manage encryption keys

Question 5

A company uses Azure Blueprints to define a repeatable set of Azure resources and policies for new subscriptions. They want to ensure that when a new subscription is created, a specific role assignment is automatically applied. What should they include in the blueprint definition?

Accepted Answer

A role assignment artifact. Azure Blueprints allow you to define artifacts that are applied to new subscriptions. A role assignment artifact is the correct choice because it directly assigns a specific Azure RBAC role to a user, group, or service principal at the subscription scope, ensuring the role is automatically applied when the blueprint is assigned to a new subscription.

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An Azure Policy assignment

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An Azure Resource Manager template

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A resource group

Question 6

A company wants to organize their Azure subscriptions into a hierarchy to manage access policies and cost across different departments. They have three departments: Sales, Marketing, IT. What should they create first?

Accepted Answer

Management groups. Management groups are the correct first step because they allow you to organize Azure subscriptions into a hierarchy for centralized management of access policies and cost across departments. By creating a management group hierarchy (e.g., Root → Departments → Sales, Marketing, IT), you can apply Azure Policy and role-based access control (RBAC) at the management group level, which then cascades down to all subscriptions and resources within that branch. This enables consistent governance and cost tracking across the entire department without needing to configure each subscription individually.

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Resource groups

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Azure Policy

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Tagging

Question 7

Which Azure service provides a platform for analyzing and visualizing large amounts of data stored in Azure Data Lake or Azure Blob Storage?

Accepted Answer

Azure HDInsight. Azure HDInsight is a fully managed, open-source analytics service that runs popular frameworks like Apache Spark, Apache Hive, and Apache Hadoop. It is specifically designed for processing and analyzing large-scale data stored in Azure Data Lake Storage or Azure Blob Storage, and integrates with visualization tools like Power BI for insights.

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Azure Data Factory

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Azure SQL Database

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Azure Cognitive Services

Question 8

A company decides to move its email to Microsoft 365. What cloud service model is this an example of?

Accepted Answer

SaaS. Moving email to Microsoft 365 is an example of Software as a Service (SaaS) because Microsoft provides the entire email application (Exchange Online) as a fully managed service. The customer accesses the software via a web browser or email client without managing the underlying infrastructure, operating system, or middleware.

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IaaS

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PaaS

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On-premises

Question 9

A company stores compliance logs in Azure Blob Storage. The logs must remain available even if an entire Azure datacenter within the primary region fails. The company is cost-conscious and wants to minimize storage costs while meeting this availability requirement. The company does not need to access the data from a secondary location during a disaster. Which storage replication option should the company choose?

Accepted Answer

Zone-redundant storage (ZRS). Zone-redundant storage (ZRS) replicates data synchronously across three Azure availability zones within the primary region. This ensures data remains available even if an entire datacenter (one zone) fails, while avoiding the higher cost and cross-region replication of GRS. Since the company does not need secondary region access and wants to minimize costs, ZRS meets the requirement without paying for geo-redundancy.

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Locally-redundant storage (LRS)

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Geo-redundant storage (GRS)

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Read-access geo-redundant storage (RA-GRS)

Question 10

Which Azure service provides fully managed Apache Cassandra NoSQL database with automatic scaling and multi-region writes?

Accepted Answer

Azure Managed Instance for Apache Cassandra. Azure Managed Instance for Apache Cassandra is the correct answer because it is a fully managed service that automates deployment, scaling, and operations of Apache Cassandra clusters, including support for multi-region writes. It provides native Cassandra API compatibility, automatic scaling, and managed multi-region replication, which aligns precisely with the question's requirements.

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Azure Cosmos DB for Apache Cassandra

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Azure Table Storage with Cassandra drivers

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Azure HDInsight with Cassandra

Question 11

Which Azure service provides a fully managed platform for running containerized microservices with built-in traffic splitting for blue-green and canary deployments?

Accepted Answer

Azure Container Apps. Azure Container Apps is a fully managed serverless platform specifically designed for running containerized microservices and applications. It natively supports advanced traffic management features like traffic splitting, which enables blue-green and canary deployment strategies without the complexity of managing an underlying Kubernetes cluster.

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Azure Kubernetes Service

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Azure App Service deployment slots

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Azure Functions

Question 12

What is Software as a Service (SaaS)?

Accepted Answer

A model where the provider delivers complete software applications managed entirely by the provider. Software as a Service (SaaS) is a cloud computing model where the provider hosts and manages the entire software application, including the underlying infrastructure, middleware, and data. Customers access the application over the internet (typically via a web browser or API) without needing to install, maintain, or update anything locally. This model shifts all operational responsibility to the provider, making it the most 'hands-off' cloud service model for the customer.

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A model where customers manage their own virtual machines and applications

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A model where customers deploy their code on provider-managed platforms

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A model where customers rent physical hardware from the provider

Question 13

Which Azure service provides the ability to test and debug Azure applications locally that interact with Azure services?

Accepted Answer

Azurite (Azure Storage Emulator) and Azure Cosmos DB Emulator. Azurite and the Azure Cosmos DB Emulator provide local emulation of Azure Blob Storage, Queue Storage, Table Storage, and Cosmos DB, enabling developers to test and debug applications that interact with these Azure services without incurring cloud costs or requiring network connectivity. This allows full offline development and debugging of Azure-dependent code.

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Azure DevTest Labs

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Azure Local Network Gateway

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Azure Cloud Shell local mode

Question 14

A company wants to track costs by department across multiple Azure subscriptions. They have tagged resources with 'Department' tags. However, some resources are missing tags. They want to see a report of costs grouped by department, including untagged resources. Which Azure tool should they use?

Accepted Answer

Azure Cost Management + Billing. Azure Cost Management + Billing provides native cost analysis and reporting capabilities that can group costs by custom tags (like 'Department') and includes an 'Untagged' category for resources missing the specified tag. This allows the company to see a complete cost breakdown by department, including untagged resources, across multiple subscriptions in a single view.

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Azure Policy

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Azure Resource Graph

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Azure Advisor

Question 15

A company is moving its on-premises data center to the cloud. Previously, they purchased servers and paid for maintenance. Now they pay a monthly subscription for compute and storage based on actual usage. This is an example of shifting from capital expenditure (CapEx) to which type of expenditure?

Accepted Answer

Operating expenditure (OpEx). This scenario describes a shift from upfront capital investment in physical servers and maintenance (CapEx) to a pay-as-you-go model where costs are incurred based on actual usage. In cloud computing, this is the definition of operating expenditure (OpEx), as the company pays a recurring monthly subscription for compute and storage resources rather than making a large initial purchase.

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Variable expenditure

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Direct expenditure

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Indirect expenditure