AZ-900 Describe Azure architecture and services Practice Question
A company is designing a disaster recovery solution for a critical application. The solution must ensure that if an entire Azure region becomes unavailable due to a natural disaster, the application can fail over to a different region. The company wants to minimize latency between the primary and secondary regions for data replication. Which Azure feature should the company use?
⚠ Common exam trap
Candidates often confuse Availability Zones (which protect within a region) with cross-region disaster recovery, or assume Azure Resource Manager is involved in replication, when in fact Paired Regions are the correct Azure construct for minimizing latency in cross-region failover.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Paired Regions
Azure Paired Regions are designed to provide disaster recovery by replicating data across two geographically separated regions within the same geopolitical boundary. If an entire region fails, the paired region can serve as the failover target, and the physical proximity of paired regions minimizes replication latency compared to arbitrary region pairs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Availability Zones
Why it's wrong here
Availability Zones are physically separate groups of datacenters within a single Azure region, each with independent power, cooling, and networking to protect against on-premises datacenter failures. They enable high availability by placing replicas in different zones, but they do not provide redundancy across multiple Azure regions, so an entire regional outage would still take all zones down. For disaster recovery that requires data residency and failover across regions, you need Azure Paired Regions rather than Availability Zones.
When this WOULD be correct
A company needs to protect an application from a single datacenter failure within a region and requires low-latency replication across physically separate datacenters in the same region. The question would specify that the solution must remain within one region.
- ✗
Azure Resource Manager
Why it's wrong here
Azure Resource Manager is the deployment and management service for Azure, providing a consistent control plane through which you create, update, and delete resources via templates, policies, and role-based access control. It does not perform data replication, health monitoring, or automatic failover across regions, and it cannot protect workloads from an entire regional outage. In a disaster recovery architecture, ARM is used to redeploy infrastructure as code, but the actual data durability and continuity must come from a replication strategy such as Azure Paired Regions.
When this WOULD be correct
An exam question asking which Azure service provides a consistent management layer to deploy, manage, and organize resources through templates and role-based access control (RBAC) would have Azure Resource Manager as the correct answer.
- ✓
Azure Paired Regions
Why this is correct
Azure Paired Regions consist of two regions within the same geography that are linked to support disaster recovery. They provide low-latency data replication and are the appropriate choice for protecting against an entire region failure.
- ✗
Azure Traffic Manager
Why it's wrong here
Azure Traffic Manager is a DNS-based traffic load balancer that can direct users to the nearest available endpoint. While it can be used for failover routing, it does not create the underlying region pairing or data replication needed for disaster recovery.
When this WOULD be correct
A company needs to distribute incoming traffic across multiple Azure regions to improve application performance and availability, with automatic failover based on endpoint health. The question would specify a need for global load balancing, not data replication.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Azure Paired RegionsCorrect answer▾
Why this is correct
Azure Paired Regions consist of two regions within the same geography that are linked to support disaster recovery. They provide low-latency data replication and are the appropriate choice for protecting against an entire region failure.
✗Availability ZonesWrong answer — click to see why▾
Why this is wrong here
Availability Zones protect against datacenter failures within a single Azure region, not against an entire region becoming unavailable. They do not provide cross-region failover.
★ When this WOULD be the correct answer
A company needs to protect an application from a single datacenter failure within a region and requires low-latency replication across physically separate datacenters in the same region. The question would specify that the solution must remain within one region.
Why candidates choose this
Candidates may confuse Availability Zones with region pairs, thinking that zones provide cross-region redundancy, or they may assume that 'zones' imply geographic separation across regions.
✗Azure Resource ManagerWrong answer — click to see why▾
Why this is wrong here
Azure Resource Manager is a management and deployment service, not a disaster recovery or replication feature. It does not provide cross-region failover or data replication capabilities.
★ When this WOULD be the correct answer
An exam question asking which Azure service provides a consistent management layer to deploy, manage, and organize resources through templates and role-based access control (RBAC) would have Azure Resource Manager as the correct answer.
Why candidates choose this
Candidates may confuse Azure Resource Manager with Azure Site Recovery or think it includes disaster recovery features because it manages resources across regions, but it is purely a management plane.
✗Azure Traffic ManagerWrong answer — click to see why▾
Why this is wrong here
Azure Traffic Manager is a DNS-based traffic load balancer that distributes traffic across regions, but it does not provide data replication or guarantee low-latency replication between regions for disaster recovery.
★ When this WOULD be the correct answer
A company needs to distribute incoming traffic across multiple Azure regions to improve application performance and availability, with automatic failover based on endpoint health. The question would specify a need for global load balancing, not data replication.
Why candidates choose this
Candidates may confuse Traffic Manager's ability to route traffic to a healthy region during an outage with the data replication and failover capabilities required for disaster recovery.
Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Azure Regions and Geographies
Key term
Feature
A feature is a distinct unit of functionality that delivers value to the user, often managed and tracked throughout the software development lifecycle.
Key term
Region
A region is a distinct geographic location where a cloud provider operates multiple data centers that are connected by low-latency networks and provide cloud services.
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.