AZ-900 Describe Azure architecture and services Practice Test 2 — 15 Questions

Question 1

A company needs to store large amounts of unstructured data, such as images and videos, for a web application. They need to access data from anywhere via HTTP/HTTPS. Which Azure storage service should they use?

Accepted Answer

A) Azure Blob Storage. Azure Blob Storage is designed for storing large amounts of unstructured data, such as images and videos, and provides REST-based access over HTTP/HTTPS from anywhere. It supports scalable object storage with global accessibility, making it ideal for web application content delivery.

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B) Azure File Storage

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C) Azure Queue Storage

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D) Azure Table Storage

Question 2

A company deploys virtual machines in Azure. They want to ensure that the VMs are distributed across multiple fault domains and update domains within an Azure datacenter to protect against hardware failures and maintenance. Which Azure construct should they use?

Accepted Answer

A) Availability Set. An Availability Set is the correct Azure construct because it logically groups VMs to protect against both hardware failures (via fault domains) and planned maintenance (via update domains) within a single Azure datacenter. Fault domains distribute VMs across separate racks with independent power, cooling, and network, while update domains ensure VMs in different groups are not rebooted simultaneously during Azure host updates. This directly matches the requirement to isolate VMs across multiple fault and update domains within a datacenter.

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B) Availability Zone

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C) Region Pair

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D) Resource Group

Question 3

A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?

Accepted Answer

Availability zone. Availability zones are physically separate data centers within an Azure region, each with independent power, cooling, and networking. By deploying the web tier VMs across two distinct zones, the application avoids a single point of failure from an infrastructure outage at the data center level, meeting the requirement for high availability across distinct data centers.

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Availability set

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Proximity placement group

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Azure Load Balancer

Question 4

A company wants to migrate an on-premises application to Azure. The application requires consistently high disk throughput for database files. They plan to use Azure virtual machines with managed disks. Which disk type should they choose to get the highest possible IOPS and throughput at a premium cost?

Accepted Answer

Ultra Disk. Ultra Disk (Option C) is correct because it provides the highest IOPS and throughput of any Azure managed disk type, with sub-millisecond latency, making it ideal for I/O-intensive workloads like database files. It is designed for premium cost scenarios where maximum performance is required, offering configurable IOPS and throughput independent of disk size.

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Standard SSD

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Premium SSD v2

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Standard HDD

Question 5

A company plans to run a large-scale batch processing job on Azure that runs for 10 hours every night. The job is fault-tolerant and can be interrupted. They want to minimize cost as much as possible. Which Azure virtual machine pricing option should they use?

Accepted Answer

Spot VMs. Spot VMs allow you to use unused Azure compute capacity at a significant discount (up to 90% compared to pay-as-you-go). Because the batch job is fault-tolerant and can be interrupted, it is an ideal workload for Spot VMs, which can be evicted when Azure needs the capacity back. This minimizes cost while meeting the job's requirements.

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Reserved Instances

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Pay-as-you-go

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Dedicated Hosts

Question 6

A company wants to run a containerized microservices application on Azure. The application requires automatic scaling, service discovery, and rolling updates without manual intervention. They prefer not to manage 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 fully managed Kubernetes orchestration platform that handles automatic scaling (via Horizontal Pod Autoscaler), service discovery (via Kubernetes DNS and Services), and rolling updates (via Deployment strategies) without requiring you to manage the underlying virtual machines. AKS abstracts the control plane and node management, allowing you to focus on deploying and managing containerized microservices.

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Azure Container Instances

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Azure App Service

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Azure Functions

Question 7

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?

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.

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Azure SQL Database

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Azure Files

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Azure Disk Storage

Question 8

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 9

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 10

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.

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Azure Files

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Azure Queue Storage

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Azure Disk Storage

Question 11

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.

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Azure Container Instances (ACI)

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Azure App Service

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Azure Functions

Question 12

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.

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Azure availability zone

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Azure resource group

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Azure management group

Question 13

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.

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Availability sets

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Resource groups

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Azure Site Recovery

Question 14

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.

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Azure Container Instances

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Azure App Service

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Azure Virtual Machines

Question 15

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.

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Azure Files

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Azure Disk Storage

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Azure Queue Storage