AZ-900 Describe Azure architecture and services Practice Test 7 — 15 Questions

Question 1

A company wants to deploy a web application that automatically scales based on traffic, without managing any virtual machines. They need high availability and support for multiple development frameworks. Which Azure service should they use?

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

Accepted Answer

Azure App Service. Azure App Service is a fully managed Platform-as-a-Service (PaaS) offering that automatically scales web applications based on traffic using built-in autoscale rules, without requiring any virtual machine management. It provides high availability through its SLA-backed multi-instance deployment and supports multiple development frameworks including .NET, Java, Node.js, Python, and PHP, making it the ideal choice for this scenario.

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Azure Virtual Machines

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Azure Functions

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Azure Kubernetes Service

Question 2

A company needs to store archival data for 10 years with the lowest possible storage cost. Data may be accessed once a year for compliance audits. Which Azure Storage access tier should they choose?

Accepted Answer

Archive. The Archive access tier is designed for data that is rarely accessed and has a flexible latency requirement, making it the most cost-effective option for long-term archival storage. With a 10-year retention period and only annual access for compliance audits, Archive provides the lowest storage cost per gigabyte compared to Cool or Hot tiers, though it incurs higher retrieval costs and latency (typically hours to rehydrate data).

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Cool

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Hot

Answer

Premium

Question 3

A company has an application running on Azure VMs across multiple availability zones to protect against data center failures. They need to distribute incoming traffic evenly across all VMs in a single region. Which Azure load balancing solution should they use?

Accepted Answer

Azure Load Balancer. Azure Load Balancer operates at Layer 4 (TCP/UDP) and distributes incoming traffic across healthy VM instances in the backend pool. By deploying VMs across multiple availability zones within a single region, the Load Balancer can route traffic evenly to all zone-resilient VMs, providing high availability and load distribution without application-layer inspection.

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Azure Application Gateway

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Azure Traffic Manager

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Azure Front Door

Question 4

A company needs to connect their on-premises network to Azure with a dedicated, private, and high-bandwidth connection that does not traverse the public internet. They require an SLA for availability and performance. Which Azure service should they use?

Accepted Answer

Azure ExpressRoute. Azure ExpressRoute is the correct choice because it provides a dedicated, private connection from on-premises networks to Azure that does not traverse the public internet. It offers a Service-Level Agreement (SLA) for availability (e.g., 99.95% for a single connection with redundancy) and performance, which is not guaranteed over internet-based VPNs. This meets the requirement for high bandwidth, privacy, and a guaranteed SLA.

Answer

Azure VPN Gateway

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Azure Virtual WAN

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Azure Peering Service

Question 5

A company wants to run a containerized application quickly without managing any virtual machines or orchestration infrastructure. They just need to start a container and have it run. Which Azure service is best suited for this?

Accepted Answer

Azure Container Instances. Azure Container Instances (ACI) is the correct choice because it provides a serverless container platform that allows you to run a container directly without managing any underlying virtual machines or orchestration infrastructure. You simply specify the container image and resource requirements, and ACI launches the container in seconds, making it ideal for quick, isolated container workloads.

Answer

Azure Kubernetes Service

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Azure App Service

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Azure Functions

Question 6

A company has virtual machines in a virtual network that run a critical internal application. IT administrators need to securely connect to these VMs from the internet for management purposes. They must not assign public IP addresses to the VMs, and they want to avoid managing SSH or RDP endpoints. Which Azure service should they use?

Accepted Answer

Azure Bastion. Azure Bastion provides secure and seamless RDP/SSH connectivity to virtual machines directly in the Azure portal over TLS, without exposing public IP addresses on the VMs. It eliminates the need for managing public endpoints, as the Bastion service is deployed inside the virtual network and acts as a jump server that brokers the connection. This meets the requirement of secure internet-based management without public IPs or manual SSH/RDP endpoint management.

Answer

Azure VPN Gateway

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Azure Load Balancer

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Azure Firewall

Question 7

A finance company is migrating a mission-critical trading application to Azure. The application must be resilient to a complete datacenter failure within the same Azure region. The solution should provide low-latency replication between separate physical locations with independent power, cooling, and networking. Which Azure feature should they use?

Accepted Answer

Availability Zones. Availability Zones (B) are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. They provide low-latency replication and protect against a complete datacenter failure by allowing the application to run in multiple zones simultaneously, ensuring high availability and resilience within a single region.

Answer

Availability Sets

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Azure Site Recovery

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Region Pairs

Question 8

A company is deploying a critical internal application in Azure. The application will run on two virtual machines. The solution must guarantee that the virtual machines are placed on separate physical servers and separate racks to minimize the impact of hardware failures. Which Azure feature should the company use?

Accepted Answer

Availability set. An availability set ensures that virtual machines are distributed across multiple fault domains (separate physical servers and racks) and update domains within an Azure datacenter. By placing the two VMs in the same availability set, Azure guarantees they will be on different physical hardware, minimizing the impact of a single hardware failure.

Answer

Azure Load Balancer

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Availability zone

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Virtual network

Question 9

A company has five Azure subscriptions, each managed by a different department. The IT governance team needs to enforce a single set of compliance policies (e.g., allowed VM SKUs) and assign a specific role to a central security team across all subscriptions. The goal is to minimize administrative overhead. Which Azure component should the governance team use as the scope for these assignments?

Accepted Answer

Place all subscriptions under a single management group and assign policies and roles at that management group level.. Management groups provide a hierarchical scope above subscriptions, enabling centralized governance. By placing all five subscriptions under a single management group, the IT governance team can assign Azure Policy definitions (e.g., allowed VM SKUs) and role-based access control (RBAC) roles (e.g., for the security team) once at that management group level. This inheritance automatically applies the policies and roles to all child subscriptions, minimizing administrative overhead compared to per-subscription or per-resource-group assignments.

Answer

Assign the policies and role at each subscription level individually.

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Create a resource group in each subscription and assign policies and roles at the resource group level.

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Create an Azure Blueprint definition and apply it to each subscription separately.

Question 10

A company is deploying a web application in Azure. The application consists of an Azure App Service, an Azure SQL Database, and a Storage account. The development team maintains three separate environments: development, test, and production. The team wants to be able to delete all resources associated with a specific environment (e.g., development) in a single action, without affecting the other environments. The solution must also allow applying role-based access control (RBAC) and tags consistently to all resources within each environment. Which Azure component should the team use to achieve these requirements?

Accepted Answer

Azure resource group. An Azure resource group is a logical container that holds related resources for an Azure solution. By placing all resources for a specific environment (e.g., development) into a single resource group, the team can delete the entire environment in one action by deleting the resource group, without affecting other environments. Additionally, RBAC roles and tags applied at the resource group level are inherited by all resources within that group, ensuring consistent governance.

Answer

Azure subscription

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Azure management group

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Azure availability zone

Question 11

A multinational bank operates a critical financial application that must remain available even if an entire Azure region experiences a prolonged outage. The bank's compliance team mandates that the disaster recovery data must reside in a separate geographic location that is at least 300 miles away from the primary region to reduce the risk of correlated failures. The solution must use Azure's built-in data replication feature without requiring manual pairing of regions. Which Azure feature meets these requirements?

Accepted Answer

Azure Region Pair. Azure Region Pairs are designed to provide built-in disaster recovery by replicating data (e.g., geo-redundant storage) to a paired region that is at least 300 miles away, ensuring geographic separation without manual pairing. This meets the bank's compliance requirement for a separate location and automatic failover capability during a prolonged regional outage.

Answer

Azure Availability Zones

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Azure Resource Manager

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Azure Policy

Question 12

A global e-commerce company has deployed its web application in two Azure regions: West US and East US. The company wants to automatically route end users to the region that provides the lowest latency, and if an entire region becomes unavailable, gracefully redirect all traffic to the remaining healthy region. Which Azure service should the company use?

Accepted Answer

Azure Traffic Manager. Azure Traffic Manager is a DNS-based traffic load balancer that routes incoming DNS requests to the endpoint with the lowest latency based on the user's geographic location. It also supports automatic failover: if an entire region becomes unavailable, Traffic Manager detects the endpoint health probe failure and redirects all traffic to the remaining healthy region, meeting the company's requirements.

Answer

Azure Load Balancer

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Azure Application Gateway

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Azure Front Door

Question 13

A financial services company runs a critical trading application in its on-premises data center. The company is migrating some workloads to Azure and requires a dedicated, private network connection between its on-premises network and Azure. The connection must not use the public internet, must provide consistent latency and higher bandwidth than a typical internet-based VPN, and must be backed by a service-level agreement (SLA) for availability. Which Azure service should the company use to meet these requirements?

Accepted Answer

ExpressRoute. ExpressRoute is the correct choice because it provides a dedicated, private connection between on-premises networks and Azure that bypasses the public internet entirely. This ensures consistent latency, higher bandwidth options (up to 100 Gbps), and a financially backed SLA of at least 99.95% availability, meeting all the stated requirements for a critical trading application.

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Azure VPN Gateway

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Azure Firewall

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Azure Front Door

Question 14

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 15

A company plans to deploy two Azure virtual machines that host a critical web application. Both VMs will be in the same Azure region and the same virtual network. The company’s requirements are: 1) During Azure platform-initiated maintenance (e.g., OS updates), at least one VM must remain running. 2) If a hardware failure occurs in the server rack that hosts one VM, the other VM must not be affected. 3) The solution must not incur additional costs beyond the VMs themselves. Which Azure feature should the company configure?

Accepted Answer

Availability Set. An Availability Set distributes VMs across multiple fault domains (different server racks with independent power and networking) and update domains (groups that undergo platform maintenance sequentially). This ensures that during Azure-initiated maintenance, only one update domain is rebooted at a time, leaving at least one VM running, and that a hardware failure in one fault domain does not affect VMs in other fault domains. Availability Sets are free of charge beyond the cost of the VMs themselves, meeting all requirements.

Answer

Availability Zones

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Azure Site Recovery

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Azure Load Balancer