AZ-900 Describe Azure architecture and services Practice Question
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?
⚠ Common exam trap
Test-takers frequently confuse Availability Zones (which protect within a region) with Region Pairs (which protect across regions), especially when the question emphasizes 'geographic separation' and 'prolonged outage.'
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 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 analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Availability Zones
Why it's wrong here
Availability Zones are physically separate datacenters within a single Azure region. While they provide protection against datacenter failures, they do not offer geographic separation of at least 300 miles and cannot protect against a full region outage.
When this WOULD be correct
A question asks: 'A company wants to protect its application from a single datacenter failure within an Azure region. Which feature provides high availability by distributing resources across physically separate locations in the same region?'
- ✗
Azure Resource Manager
Why it's wrong here
Azure Resource Manager is the deployment and management control plane for Azure resources. It processes requests through REST APIs and templates but is entirely logical, not physical. It does not automatically place resources across geographically separated datacenters and lacks any built-in data replication for disaster recovery. While it can deploy a solution into multiple regions, it cannot by itself provide the 300-mile separation or failover that a region pair offers.
When this WOULD be correct
A question asking which Azure service provides a consistent management layer to deploy, manage, and organize resources using templates and role-based access control (RBAC) across environments.
- ✗
Azure Policy
Why it's wrong here
Azure Policy is a governance mechanism for enforcing organizational standards at scale, such as restricting resource locations or ensuring required tags. It operates by evaluating and auditing resources against rules, and can deny or remediate noncompliant deployments. However, it only controls configuration and compliance; it does not physically replicate data, create redundancy, or define pairing between regions. Therefore it cannot address the application's need for loss-tolerant geographic failover.
When this WOULD be correct
A company needs to ensure that all resources deployed in a subscription comply with a regulation requiring data to be stored in a specific geographic location. Azure Policy can enforce this by auditing or denying deployments outside allowed regions.
- ✓
Azure Region Pair
Why this is correct
Each Azure region is paired with another region in the same geography (e.g., East US with West US) that is at least 300 miles away. Region pairs are predefined by Azure and enable built-in replication for services like Storage and SQL Database, ensuring data residency and disaster recovery compliance without manual pairing.
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 Region PairCorrect answer▾
Why this is correct
Each Azure region is paired with another region in the same geography (e.g., East US with West US) that is at least 300 miles away. Region pairs are predefined by Azure and enable built-in replication for services like Storage and SQL Database, ensuring data residency and disaster recovery compliance without manual pairing.
✗Azure Availability ZonesWrong answer — click to see why▾
Why this is wrong here
Azure Availability Zones protect against datacenter failures within a single region, not against an entire region outage. They do not provide disaster recovery across geographic distances of at least 300 miles.
★ When this WOULD be the correct answer
A question asks: 'A company wants to protect its application from a single datacenter failure within an Azure region. Which feature provides high availability by distributing resources across physically separate locations in the same region?'
Why candidates choose this
Candidates may confuse high availability within a region (Availability Zones) with disaster recovery across regions (Region Pairs), especially when the term 'availability' is used broadly.
✗Azure Resource ManagerWrong answer — click to see why▾
Why this is wrong here
Azure Resource Manager is a management and deployment layer, not a data replication feature. It cannot ensure geographic separation or automatic failover for disaster recovery across regions.
★ When this WOULD be the correct answer
A question asking which Azure service provides a consistent management layer to deploy, manage, and organize resources using templates and role-based access control (RBAC) across environments.
Why candidates choose this
Candidates may confuse Resource Manager with a feature that manages replication or pairing because it orchestrates resource deployment and can enforce policies across regions.
✗Azure PolicyWrong answer — click to see why▾
Why this is wrong here
Azure Policy is used to enforce organizational standards and assess compliance, not for data replication or disaster recovery across geographically separated regions.
★ When this WOULD be the correct answer
A company needs to ensure that all resources deployed in a subscription comply with a regulation requiring data to be stored in a specific geographic location. Azure Policy can enforce this by auditing or denying deployments outside allowed regions.
Why candidates choose this
Candidates may confuse Azure Policy's compliance capabilities with the disaster recovery requirement, thinking it can enforce the 300-mile separation rule, but it does not provide data replication.
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
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.
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.
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.