AZ-900 Describe Azure architecture and services Practice Test 4 — 15 Questions

Question 1

A company wants to store large amounts of unstructured data (e.g., images, videos, documents) that will be accessed from multiple applications over HTTP/HTTPS. The data needs to be highly durable and available. Which Azure storage service should they use?

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

Accepted Answer

Azure Blob Storage. Azure Blob Storage is designed for storing massive amounts of unstructured data, such as images, videos, and documents, and it provides native HTTP/HTTPS access via REST APIs. It offers industry-leading durability (99.9999999999% for RA-GRS) and high availability, making it the correct choice for this scenario.

Answer

Azure SQL Database

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Azure Files

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Azure Disk Storage

Question 2

A company needs to run a custom-built Windows application that requires full administrative access to the operating system, including the ability to install custom software and configure firewall rules. They also need to ensure the application is highly available by running multiple instances. Which Azure compute service should they use?

Accepted Answer

Azure Virtual Machines. Azure Virtual Machines (VMs) provide full administrative access to the operating system, allowing you to install custom software, configure firewall rules, and manage the OS as needed. By deploying multiple VMs in an availability set or across availability zones, you can achieve high availability for the application. This makes VMs the correct choice for a custom Windows application requiring full OS control and multi-instance high availability.

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Azure App Service

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Azure Functions

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Azure Container Instances

Question 3

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 4

A company needs to store large amounts of unstructured data, such as images and videos, which will be accessed by multiple applications over the internet. The data must be highly durable and available. Which Azure storage service should they use?

Accepted Answer

Azure Blob Storage. Azure Blob Storage is designed for storing massive amounts of unstructured data, such as images and videos, and provides high durability (99.9999999999% with LRS) and availability through geo-replication options. It supports access via HTTP/HTTPS from any internet-connected application, making it ideal for this scenario.

Answer

Azure Files

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Azure Queue Storage

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Azure Disk Storage

Question 5

A company wants to run a containerized microservices application on Azure. They need automatic scaling based on demand, service discovery, and rolling updates without manual intervention. They want to avoid managing the underlying virtual machines. Which Azure compute service should they choose?

Accepted Answer

Azure Kubernetes Service (AKS). Azure Kubernetes Service (AKS) is the correct choice because it provides a managed Kubernetes orchestration platform that supports automatic scaling (Horizontal Pod Autoscaler), service discovery (via DNS and Kubernetes Services), and rolling updates (via Deployment strategies) without requiring you to manage the underlying VMs. AKS abstracts the control plane and node management, aligning perfectly with the requirement to avoid VM management while offering full container orchestration capabilities.

Answer

Azure Container Instances (ACI)

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Azure App Service

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Azure Functions

Question 6

A company wants to deploy a virtual machine in Azure and needs to ensure that the VM is placed in a location that provides the lowest network latency to its users in Europe. Which Azure construct should they consider to meet this requirement?

Accepted Answer

Azure region. Azure regions are geographically discrete data center groupings that provide low-latency connectivity to users within that region. By deploying the VM in a Europe-based region (e.g., West Europe or North Europe), the company ensures the shortest physical distance and network path to its European users, minimizing latency. Availability zones, resource groups, and management groups do not influence geographic placement or network latency.

Answer

Azure availability zone

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Azure resource group

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Azure management group

Question 7

A company deploys a critical application on Azure virtual machines. They want to ensure that the VMs are distributed across physically separate datacenters within a single Azure region to protect against a single datacenter failure. Which Azure feature should they use?

Accepted Answer

Availability zones. 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 is protected from a single datacenter failure, as Azure ensures at least one zone remains operational during an outage.

Answer

Availability sets

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Resource groups

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Azure Site Recovery

Question 8

A company wants to run a containerized application in Azure without managing any virtual machines. They need automatic scaling, load balancing, and service discovery. Which Azure compute service should they choose?

Accepted Answer

Azure Kubernetes Service (AKS). Azure Kubernetes Service (AKS) is the correct choice because it provides a fully managed Kubernetes orchestration platform that abstracts away the underlying virtual machines. AKS handles automatic scaling via the Horizontal Pod Autoscaler (HPA) and cluster autoscaler, built-in load balancing through Azure Load Balancer integration, and service discovery using Kubernetes DNS (CoreDNS). This meets the requirement of running containerized applications without managing VMs.

Answer

Azure Container Instances

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Azure App Service

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Azure Virtual Machines

Question 9

A company needs to store massive amounts of unstructured data, such as videos and images, that will be accessed over the internet. The data must be highly durable and available. Which Azure service should they use?

Accepted Answer

Azure Blob Storage. Azure Blob Storage is designed for storing massive amounts of unstructured data, such as videos and images, and provides high durability (99.9999999999% with LRS) and availability through geo-redundancy options. It is accessible over the internet via HTTP/HTTPS, making it ideal for serving content globally.

Answer

Azure Files

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Azure Disk Storage

Answer

Azure Queue Storage

Question 10

A company uses Azure to run a virtual machine for development. They want to ensure that if the physical server hosting the VM fails, the VM is automatically restarted on another server within the same Azure datacenter. Which Azure SLA does this scenario relate to?

Accepted Answer

99.9% VM SLA for a single instance. The scenario describes a single VM that automatically restarts on another physical host within the same datacenter after a hardware failure. This is covered by the Azure VM SLA for a single instance, which guarantees 99.9% uptime when you use premium SSD or ultra disks and have the VM deployed in a single availability zone or just within a datacenter. The SLA specifically addresses connectivity to the VM and its automatic recovery from host failures, not multi-instance redundancy.

Answer

99.95% VM SLA for multiple instances

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99.99% SQL Database SLA

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No SLA applied

Question 11

A company deploys a web application on Azure VMs across two different physical locations within the same Azure region. These locations are isolated from each other in terms of power, cooling, and networking. If one location fails, the application remains available from the other location. Which feature achieves this?

Accepted Answer

Availability zones. Availability zones are physically separate locations (datacenters) within an Azure region, each with independent power, cooling, and networking. By deploying VMs across two zones, the application remains available if one zone fails, achieving high availability. This matches the scenario exactly.

Answer

Availability sets

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Resource groups

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Virtual machine scale sets

Question 12

A company wants to ensure its Azure resources are deployed in a geographic location that is paired with another region for disaster recovery. If a regional outage occurs, they plan to failover to the paired region. Which concept does this describe?

Accepted Answer

Azure region pairs. Azure region pairs are designed to support disaster recovery by ensuring that each Azure region is paired with another region in the same geography (e.g., East US paired with West US). During a regional outage, services can failover to the paired region, and Microsoft prioritizes recovery of paired regions to minimize downtime. This concept directly matches the scenario described, where the company plans to use a paired region for failover.

Answer

Availability zones

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Azure geographies

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Sovereign regions

Question 13

A team uses Docker containers to run microservices. They need a service that automatically manages the cluster, scales containers based on demand, and provides load balancing without requiring them to manage the underlying VMs. Which Azure compute service should they choose?

Accepted Answer

Azure Kubernetes Service. Azure Kubernetes Service (AKS) is the correct choice because it provides a managed Kubernetes cluster that automates container orchestration, scaling, and load balancing. AKS abstracts the underlying VMs, handling master node management, updates, and scaling based on demand, which aligns with the team's requirement to avoid VM management.

Answer

Azure Container Instances

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Azure Batch

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Azure Virtual Machine Scale Sets

Question 14

A company stores billions of image files that are accessed frequently via HTTP from a web application. They need a highly scalable and durable storage solution with global accessibility. Which Azure storage service should they use?

Accepted Answer

Azure Blob Storage. Azure Blob Storage is designed for storing massive amounts of unstructured data, such as image files, and provides HTTP/HTTPS access via REST APIs. It offers high scalability (up to petabytes), durability (99.9999999999% with LRS/RA-GRS), and global accessibility through a globally unique endpoint and optional CDN integration. This makes it the ideal choice for frequently accessed image files in a web application.

Answer

Azure Files

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Azure Queue Storage

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Azure Disk Storage

Question 15

A company wants to segregate their Azure resources into logical groups based on department and environment. They also want to apply access control and management at these group levels. Which Azure construct should they use?

Accepted Answer

Resource groups. Resource groups are logical containers in Azure that allow you to group related resources (e.g., VMs, databases, storage) by department and environment. They enable you to apply access control via Azure RBAC and management policies (e.g., tags, locks) at the group level, ensuring consistent governance across all resources within the group.

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Availability sets

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Virtual networks

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Subscriptions