The answer is Azure region pairs. This concept is correct because Azure region pairs are specifically designed to support disaster recovery across paired regions, ensuring that each region is linked with another in the same geography—such as East US paired with West US—so that during a regional outage, services can failover to the paired region, with Microsoft prioritizing recovery of both regions to minimize downtime. On the Microsoft Azure Fundamentals AZ-900 exam, this tests your understanding of high availability and disaster recovery strategies, often appearing in scenarios where a company needs to maintain business continuity across geographic boundaries. A common trap is confusing region pairs with availability zones, but remember: availability zones are within a single region, while region pairs span separate geographic locations for cross-region failover. Memory tip: think of region pairs as a “buddy system” for regions—each region has one partner to rely on during a disaster.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 region pairs
Why this is correct
Correct. Region pairs provide cross-region replication and failover capabilities.
Related concept
Read the scenario before looking for a memorised answer.
✗
Availability zones
Why it's wrong here
Availability zones are within a single region, not across regions.
✗
Azure geographies
Why it's wrong here
Geographies define broader data residency boundaries but do not pair specific regions for failover.
✗
Sovereign regions
Why it's wrong here
Sovereign regions (e.g., US Gov) are isolated for compliance, not for automatic disaster recovery pairing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse availability zones (which provide redundancy within a region) with region pairs (which provide disaster recovery across regions), leading them to select availability zones when the question explicitly mentions a paired region for failover.
Detailed technical explanation
How to think about this question
Under the hood, Azure region pairs are defined by Microsoft with a minimum distance of 300 miles (when possible) to reduce the risk of simultaneous outages from natural disasters. Each pair has a sequential update order (e.g., one region is updated first, the other later) to minimize downtime during planned maintenance. In a real-world scenario, if a primary region fails, services like Azure SQL Database can automatically failover to the paired region using geo-replication, ensuring data durability and business continuity.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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