AZ-900 Describe Azure architecture and services Practice Test 3 — 15 Questions

Question 1

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

Answer

99.99% SQL Database SLA

Answer

No SLA applied

Question 2

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

Answer

Resource groups

Answer

Virtual machine scale sets

Question 3

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

Answer

Azure geographies

Answer

Sovereign regions

Question 4

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

Answer

Azure Batch

Answer

Azure Virtual Machine Scale Sets

Question 5

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

Answer

Azure Queue Storage

Answer

Azure Disk Storage

Question 6

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.

Answer

Availability sets

Answer

Virtual networks

Answer

Subscriptions

Question 7

A company deploys a web application on Azure Virtual Machines across multiple availability zones within a single region. They need to distribute incoming network traffic across these VM instances to ensure high availability. Which Azure service should they use?

Accepted Answer

Azure Load Balancer. Azure Load Balancer is the correct choice because it operates at Layer 4 (TCP/UDP) and distributes incoming traffic across healthy virtual machines within a single region, including across availability zones. It provides high availability by automatically routing traffic only to healthy VM instances based on health probes, and it supports both public and internal load balancing scenarios.

Answer

Azure Application Gateway

Answer

Azure Traffic Manager

Answer

Azure Front Door

Question 8

A company plans to use Azure Site Recovery to replicate on-premises virtual machines to Azure for disaster recovery. Due to regulatory restrictions, they cannot use the paired region and must replicate to a specific Azure region in the same continent. Can they select this non-paired region as the recovery target?

Accepted Answer

Yes, you can select any Azure region as the target for replication.. Azure Site Recovery allows you to replicate on-premises virtual machines to any Azure region that supports the service, not just the paired region. The paired region is a default recommendation for cost and latency optimization, but it is not a mandatory requirement. Therefore, you can select a non-paired region as the recovery target as long as it is within the same continent and meets regulatory restrictions.

Answer

No, replication is only allowed to the paired region.

Answer

Yes, but only if both regions are within the same availability zone.

Answer

No, only to regions that are within the same geography.

Question 9

A company wants to host a static website (HTML, CSS, JavaScript) that is accessed by users worldwide. They need a low-cost solution that provides high availability and global reach without managing servers. Which Azure service is most cost-effective for this scenario?

Accepted Answer

Azure Blob Storage with static website hosting. Azure Blob Storage with static website hosting is the most cost-effective solution because it allows you to host static content (HTML, CSS, JavaScript) directly from a storage container without provisioning any virtual machines or app service plans. It provides built-in high availability through geo-redundant storage (GRS) and global reach via integration with Azure CDN, while the pay-per-GB storage model and no compute costs keep expenses minimal.

Answer

Azure App Service

Answer

Azure Virtual Machines

Answer

Azure CDN

Question 10

A company runs a large data analytics job for a few hours each week. They want to use Azure virtual machines with the lowest possible cost, accepting that the VMs may be reclaimed by Azure at any time. Which pricing option should they choose?

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) but can be evicted by Azure when capacity is needed elsewhere. This makes them ideal for interruptible, batch-style workloads like a weekly data analytics job that can tolerate interruptions and resume later.

Answer

Reserved Instances

Answer

Pay-as-you-go

Answer

Dedicated Hosts

Question 11

A company's development team wants to deploy a containerized application without worrying about the underlying virtual machines or Kubernetes control plane. They need a service that automatically manages the container orchestration, scales, and provides rolling updates. 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 cluster, handling the control plane and worker node management, while allowing the development team to focus on deploying and managing containerized applications. AKS supports automatic scaling, rolling updates, and self-healing, meeting the requirement for a managed container orchestration service without worrying about underlying VMs or the Kubernetes control plane.

Answer

Azure Container Instances (ACI)

Answer

Azure Container Apps

Answer

Azure Service Fabric

Question 12

An application deployed on Azure Virtual Machines needs to be resilient to failures within a single Azure region. The VMs are placed across multiple physically separate locations within the region, each with independent power, cooling, and networking. What is this feature called?

Accepted Answer

Availability zone. Availability zones are physically separate locations within an Azure region, each with independent power, cooling, and networking. By placing VMs across different zones, you protect your application from a single point of failure within the region, such as a datacenter outage. This is the correct feature for achieving intra-region resilience.

Answer

Availability set

Answer

Region pair

Answer

Resource group

Question 13

A company runs a containerized application on Azure. They want to use Kubernetes for orchestration but do not want to manage the control plane nodes. They need a managed Kubernetes service. Which Azure 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 service. With AKS, Azure manages the control plane nodes (including the API server, etcd, and scheduler) automatically, so the company does not need to manage them. This meets the requirement for a managed Kubernetes service without control plane management overhead.

Answer

Azure Container Instances

Answer

Azure Container Registry

Answer

Azure App Service

Question 14

A web application needs to store large amounts of unstructured data (images, documents) that will be accessed via HTTP from anywhere in the world. The data must be highly durable and scalable. Which Azure storage solution is most appropriate?

Accepted Answer

Azure Blob Storage. Azure Blob Storage is designed for storing massive amounts of unstructured data, such as images and documents, and provides HTTP/HTTPS access from anywhere. It offers high durability (99.9999999999% with RA-GRS) and massive scalability, making it the ideal choice for globally accessible, unstructured data workloads.

Answer

Azure SQL Database

Answer

Azure File Storage

Answer

Azure Cosmos DB

Question 15

A company has multiple on-premises sites that need to connect to Azure over high-throughput, low-latency private connections. They want a dedicated private connection that does not traverse the internet. Which Azure service should they use?

Accepted Answer

Azure ExpressRoute. Azure ExpressRoute provides a dedicated private connection from on-premises sites to Azure that does not traverse the public internet, ensuring high throughput and low latency. It uses a Layer 3 VPN or direct peering via a connectivity provider, bypassing internet-based routing entirely. This makes it ideal for scenarios requiring consistent performance and security for hybrid connectivity.

Answer

Azure VPN Gateway

Answer

Azure Virtual WAN

Answer

Azure Peering Service