AZ-900 Describe Azure architecture and services Practice Question
Which Azure region feature pairs two regions together for business continuity and disaster recovery?
⚠ Common exam trap
It's easy for candidates to confuse Availability Zones (which are within a single region) with Region Pairs (which span two regions), leading them to select Availability Zones for disaster recovery scenarios that require geographic separation.
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 Pairs
Azure Region Pairs are designed to provide business continuity and disaster recovery by pairing two regions within the same geography (e.g., East US and West US) that are at least 300 miles apart. This ensures that if a natural disaster or regional outage occurs, one region in the pair can take over workloads, and Azure prioritizes the recovery of paired regions during outages. The pairing also enables data replication services like Azure Site Recovery and geo-redundant storage (GRS) to automatically replicate data across the pair.
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 datacenters within an Azure region, each with independent power, cooling, and networking. They provide high availability by allowing you to replicate VMs and workloads across zones, but they cannot protect against a region-wide outage because all zones share the same regional boundary. Since the failure domain is limited to the region, they are not the cross-region disaster recovery pairing described in the question.
- ✓
Azure Region Pairs
Why this is correct
Azure Region Pairs are two regions within the same Azure geography that are deliberately paired for disaster recovery and replication. Each pair is separated by a significant distance (often 300+ miles), enabling data redundancy and automatic failover across regions during a disaster. Microsoft also uses these pairs to sequence platform updates, reducing the chance of simultaneous downtime. This direct pairing for business continuity makes Region Pairs the correct answer.
- ✗
Azure Data Centers
Why it's wrong here
Azure Data Centers are the physical facilities where Azure resources reside, providing compute, storage, and networking capacity. A single data center is a local building within a region, and it does not have a built-in pairing relationship with another data center for disaster recovery. While data centers are essential components, they are not the abstract concept of two paired regions that ensures cross-region resilience.
- ✗
Sovereign Regions
Why it's wrong here
Sovereign Regions, such as Azure Government or Azure China, are isolated Azure deployments that comply with specific legal, regulatory, or security requirements. These clouds are not paired with public Azure regions for replication, and they operate independently with their own boundaries and service availability. Thus, they do not represent the cross-region disaster recovery pairing that Azure Region Pairs provide.
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
Geo-redundant storage
Geo-redundant storage is a data storage strategy that automatically copies and maintains data in at least two geographically separated locations to protect against regional disasters and ensure high availability.
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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.