AZ-900 Practice Test 27 — 15 Questions

Question 1

A company plans to containerize a legacy web application and run it on Azure. The application experiences variable traffic volumes, with periodic spikes during lunch hours and weekends. The company wants the solution to automatically increase the number of running container instances during high demand and reduce them during low demand, without requiring any manual intervention or management of server infrastructure. Which Azure compute service should the company use?

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

Accepted Answer

Azure App Service. Azure App Service is correct because it supports containerized web applications with built-in autoscaling capabilities that automatically adjust the number of running container instances based on demand, such as CPU or memory thresholds, without requiring any manual intervention or server management. The platform handles the underlying infrastructure, patching, and load balancing, making it ideal for variable traffic patterns like lunch-hour spikes.

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Azure Container Instances (ACI)

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Azure Kubernetes Service (AKS)

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Azure Functions

Question 2

A company has a large dataset of historical financial records that must be retained for 10 years to comply with regulatory requirements. The data is accessed only a few times per year during audits. When accessed, a retrieval delay of up to 15 hours is acceptable. The company wants to minimize storage costs for this dataset. Which Azure Blob storage access tier should the company use?

Accepted Answer

Archive tier. The Archive tier is the correct choice because it is the lowest-cost storage tier for data that is rarely accessed and has a flexible retrieval time. With a 10-year retention requirement and only a few accesses per year, the Archive tier's retrieval time of up to 15 hours (actual range is 1–15 hours for standard retrieval) is acceptable, and it minimizes storage costs compared to other tiers.

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Hot tier

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Cool tier

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Premium tier

Question 3

A company stores critical financial records in an Azure Storage account. The operations team needs to ensure that the storage account cannot be deleted by any user, including administrators with Contributor permissions. However, authorized users must still be able to add and modify blobs. The solution should not affect the ability to update the account's configuration. Which Azure feature should the company implement?

Accepted Answer

Apply a CanNotDelete resource lock on the storage account.. A CanNotDelete resource lock on the storage account prevents any user, including those with Contributor permissions, from deleting the resource. This satisfies the requirement that even administrators cannot delete the account, while still allowing authorized users to add and modify blobs (since blob operations are controlled by Azure RBAC roles, not the lock) and update the account's configuration (the lock only blocks delete operations).

Answer

Assign the Storage Blob Data Owner role to the operations team.

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Create an Azure Policy that denies delete operations on storage accounts.

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Move the storage account to a new resource group.

Question 4

A company uses Azure Blob Storage to store backup files that must survive a complete regional outage. The company needs the data to be automatically accessible from a secondary region if the primary region becomes unavailable, without any manual failover. Which storage redundancy option should the company use?

Accepted Answer

Read-Access Geo-Redundant Storage (RA-GRS). Read-Access Geo-Redundant Storage (RA-GRS) is the correct choice because it provides geo-redundancy (data replicated to a secondary region for disaster recovery) and, crucially, enables read access to the secondary region without requiring a manual failover. This ensures that if the primary region becomes unavailable, the data is automatically accessible from the secondary region for read operations, meeting the requirement of no manual intervention.

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Locally Redundant Storage (LRS)

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Zone-Redundant Storage (ZRS)

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Geo-Redundant Storage (GRS)

Question 5

A company plans to migrate a steady-state application to Azure. The application requires a fixed number of virtual machines running 24/7 for the next three years. The company wants to minimize the total cost of ownership for these virtual machines over the three-year period. Which Azure pricing option should the company select when purchasing the virtual machines?

Accepted Answer

Reserved Instances. Reserved Instances (RIs) provide a significant discount (up to 72% compared to pay-as-you-go) in exchange for a one- or three-year commitment. Since the application requires a fixed number of VMs running 24/7 for exactly three years, RIs align perfectly with this predictable, steady-state workload, minimizing total cost of ownership.

Answer

Pay-as-you-go pricing

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Spot Virtual Machines

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Azure Hybrid Benefit

Question 6

A company uses Azure Policy to enforce governance on their subscriptions. They want to ensure that every newly created Azure resource automatically receives two tags: 'Owner' and 'CostCenter'. If a user or an automated process creates a resource without specifying these tags, the policy should add the missing tags with default values of 'Unassigned' without blocking the resource creation. Which Azure Policy effect should be used in the policy definitions?

Accepted Answer

Append. (Append) is correct because the Append effect adds specified fields (such as tags) to a resource during creation or update without blocking the operation. In this scenario, the policy must automatically add the 'Owner' and 'CostCenter' tags with default values of 'Unassigned' when they are missing, which is exactly what Append does—it modifies the resource request to include the missing tags before the resource is created.

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Deny

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Audit

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DeployIfNotExists

Question 7

A company stores critical business data in an Azure Storage account. The data must remain available if a single Azure datacenter experiences a failure (e.g., fire, power outage). The company wants to minimize storage costs. Which storage redundancy option should they choose?

Accepted Answer

Zone-redundant storage (ZRS). Zone-redundant storage (ZRS) synchronously replicates data across three Azure availability zones within a single region, ensuring data remains available if an entire datacenter fails. This meets the requirement for datacenter failure protection while minimizing costs compared to geo-redundant options, as ZRS does not incur cross-region bandwidth charges.

Answer

Locally redundant storage (LRS)

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Geo-redundant storage (GRS)

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

Question 8

A rapidly growing e-commerce company currently hosts its website on a single server in a US data center. Customers in Europe and Asia report slow load times and timeouts. The company wants to improve performance for global users without building and managing data centers worldwide. They plan to deploy the website on Azure virtual machines in multiple Azure regions (e.g., West Europe, Southeast Asia) and use Azure Traffic Manager to route users to the closest region. Which benefit of cloud computing does this approach primarily demonstrate?

Accepted Answer

Global reach. This approach primarily demonstrates global reach, which is the ability to deploy applications and services across multiple geographic regions to provide low-latency access to users worldwide. By hosting the website on Azure VMs in West Europe and Southeast Asia, and using Azure Traffic Manager to route users to the closest region based on DNS-based traffic routing (e.g., performance or geographic routing methods), the company leverages Azure's distributed infrastructure without building or managing its own data centers. This directly addresses the performance issues for European and Asian customers by reducing network latency and avoiding timeouts.

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Scalability

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Elasticity

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High availability

Question 9

A company uses a single Azure subscription for its development and production workloads. The finance team wants to set a monthly spending limit for the entire subscription and receive an email alert when the costs are projected to exceed 80% of that limit. The company does not want any resources to be automatically stopped or deleted when the limit is reached. Which Azure feature should the finance team configure?

Accepted Answer

Azure Budgets in Azure Cost Management + Billing. Azure Budgets in Azure Cost Management + Billing allows you to set a spending limit (budget) for a subscription and configure alert thresholds (e.g., 80% of the budget) that trigger email notifications when costs are projected to exceed that percentage. Crucially, Azure Budgets only sends alerts and does not automatically stop or delete resources, matching the company's requirement to avoid any automatic resource termination.

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Azure Policy with the 'deny' effect

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Azure Advisor cost recommendations

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Azure Service Health alerts

Question 10

A company traditionally purchased physical servers and networking equipment every three years, paying the full cost upfront. They are now migrating their workloads to Azure virtual machines. The finance team wants to understand the primary financial benefit of the new cloud model. Which statement best describes this benefit?

Accepted Answer

The company can replace large upfront capital expenditures with variable monthly payments based on actual usage.. Migrating from on-premises physical servers to Azure virtual machines shifts the cost model from Capital Expenditure (CapEx) — paying the full hardware cost upfront every three years — to Operational Expenditure (OpEx), where you pay only for the compute, storage, and network resources you actually consume on a monthly basis. This aligns costs directly with usage, avoiding large upfront investments and enabling better cash flow management.

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The company can stop paying for electricity and cooling because Azure includes those costs in the monthly bill.

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The company will pay a fixed monthly fee for each virtual machine, regardless of whether it is running or stopped.

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The company can reduce its overall IT spending by 50% or more when moving to the cloud.

Question 11

A company has deployed a critical production application in an Azure resource group. The security team wants to prevent accidental deletion or modification of any resources within that resource group. They have already configured Azure RBAC roles to grant only necessary permissions to the operations team. However, they need an additional protection that even users with Owner permissions cannot delete the resource group or its resources without a two-step process to remove the protection. Which Azure feature should the company implement?

Accepted Answer

Azure Resource Lock. Azure Resource Lock is the correct feature because it provides a protection mechanism that prevents accidental deletion or modification of resources, even for users with Owner permissions. Unlike RBAC, which controls who can perform actions, a resource lock enforces a restriction that must be explicitly removed (a two-step process) before any changes can be made. This directly addresses the requirement for an additional layer of protection beyond role-based access control.

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Azure Policy

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Azure Blueprint

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Azure Resource Tag

Question 12

A company's data engineering team needs to process CSV files that are uploaded to an Azure Blob Storage container. For each uploaded file, the team must run a custom Python script to clean and transform the data. The team wants a solution that automatically triggers the script upon file upload, does not require them to manage any virtual machines or containers, and charges only when code executes. Which Azure service should the team use?

Accepted Answer

Azure Functions. Azure Functions is the correct choice because it provides a serverless compute service that can be triggered directly by an HTTP request or a Blob Storage event (via an Event Grid subscription or a Blob trigger). This allows the custom Python script to execute automatically when a CSV file is uploaded, without provisioning or managing any virtual machines or containers. The consumption plan ensures you are charged only for the duration of code execution, meeting all stated requirements.

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Azure Logic Apps

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Azure Container Instances

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Azure Batch

Question 13

A company runs its production workloads on an on-premises data center to meet strict regulatory compliance requirements. However, the development and testing teams use Azure to quickly provision environments on demand for short-term projects. The teams need to occasionally transfer data between the on-premises environment and Azure. Which cloud deployment model does this setup represent?

Accepted Answer

Hybrid cloud. This setup combines an on-premises data center (private cloud) with Azure (public cloud) to form a hybrid cloud. The hybrid cloud model allows workloads to remain on-premises for compliance while leveraging Azure's elasticity for dev/test, with data transfer bridging both environments.

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Public cloud

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Private cloud

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Community cloud

Question 14

A retail company hosts an e-commerce website on on-premises servers. During seasonal sales events, the website experiences traffic spikes that last for a few hours. Several years ago, the company purchased additional servers to handle these spikes, but those servers now sit idle for most of the year. The company is considering moving the website to Azure. Which benefit of cloud computing would most directly help the company avoid maintaining idle hardware while still being able to handle traffic spikes?

Accepted Answer

Elasticity. Elasticity is the correct answer because it allows the company to automatically scale computing resources up during traffic spikes and scale down when demand drops, eliminating the need to maintain idle on-premises servers. In Azure, this is achieved through features like Virtual Machine Scale Sets and autoscale rules that adjust capacity based on metrics such as CPU usage or request count, ensuring the company only pays for resources consumed during peak periods.

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High availability

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Disaster recovery

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Geo-redundancy

Question 15

A company runs a critical transaction-processing application on Azure virtual machines in the East US region. The application writes data to Azure managed disks and also stores files in Azure Blob Storage. The company's disaster recovery policy requires that all storage data must survive a complete failure of an Azure availability zone within the same region without any data loss. The solution must use synchronous replication and must not replicate data to a different Azure region. Which Azure storage redundancy option should the company configure for the Blob Storage account?

Accepted Answer

Zone-redundant storage (ZRS). Zone-redundant storage (ZRS) synchronously replicates data across three Azure availability zones within the same region, ensuring no data loss if an entire zone fails. This meets the disaster recovery requirement for synchronous replication and intra-region resilience without replicating to a different region.

Answer

Locally redundant storage (LRS)

Answer

Geo-redundant storage (GRS)

Answer

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