- A
Availability Zones within a single region
Why wrong: Availability Zones protect against datacenter failures within one region, not against failures that affect an entire region. They do not span across two separate regions as required by the scenario.
- B
Azure region pairs
Azure region pairs are designed to provide protection against simultaneous failures by ensuring sequential updates and physical separation. This is the specific feature that pairs regions for disaster recovery purposes.
- C
Azure Traffic Manager with geographic routing
Why wrong: Traffic Manager is a DNS-based load balancer that routes traffic to endpoints based on routing methods like geographic proximity. It does not define or guarantee any pairing between regions for disaster recovery or update sequencing.
- D
Azure Site Recovery replication between any two regions of your choice
Why wrong: Azure Site Recovery can replicate virtual machines between any two Azure regions, but it does not provide the additional guarantees of sequential updates and physical isolation that are inherent to region pairs. Using a region pair is a recommended best practice when using Site Recovery.
Quick Answer
The answer is Azure region pairs. This feature is the correct choice because it ensures that two paired regions are updated sequentially during platform maintenance, preventing simultaneous failure from a major update, and they are physically separated by at least 300 miles to reduce the risk of both regions being impacted by a widespread natural disaster. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of how Azure’s infrastructure inherently supports disaster recovery design, often appearing in scenario-based questions where a company needs high availability without relying on manual configuration. A common trap is confusing region pairs with availability zones—remember that pairs are for disaster recovery across distant geographies, while zones protect within a single region. For a quick memory tip, think “paired for protection: sequential updates and 300 miles apart.”
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 global company is designing a disaster recovery solution for a critical application. They plan to deploy the application to two Azure regions. The company wants to minimize the risk of both regions failing simultaneously due to a major platform update or a widespread natural disaster. Which Azure feature provides a specific pairing of regions to meet this goal?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 ensure that two paired regions are updated sequentially during platform maintenance, reducing the risk of simultaneous failure. They are also physically separated by at least 300 miles to minimize the impact of natural disasters. This meets the company's goal of minimizing simultaneous failure risk from both a major platform update and a widespread natural disaster.
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.
- ✗
Availability Zones within a single region
Why it's wrong here
Availability Zones protect against datacenter failures within one region, not against failures that affect an entire region. They do not span across two separate regions as required by the scenario.
- ✓
Azure region pairs
Why this is correct
Azure region pairs are designed to provide protection against simultaneous failures by ensuring sequential updates and physical separation. This is the specific feature that pairs regions for disaster recovery purposes.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Azure Traffic Manager with geographic routing
Why it's wrong here
Traffic Manager is a DNS-based load balancer that routes traffic to endpoints based on routing methods like geographic proximity. It does not define or guarantee any pairing between regions for disaster recovery or update sequencing.
- ✗
Azure Site Recovery replication between any two regions of your choice
Why it's wrong here
Azure Site Recovery can replicate virtual machines between any two Azure regions, but it does not provide the additional guarantees of sequential updates and physical isolation that are inherent to region pairs. Using a region pair is a recommended best practice when using Site Recovery.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Availability Zones (which protect within a region) with region pairs (which protect across regions), or assume that any two regions can be used for disaster recovery with the same guarantees as official region pairs.
Trap categories for this question
Scenario analysis trap
Availability Zones protect against datacenter failures within one region, not against failures that affect an entire region. They do not span across two separate regions as required by the scenario.
Detailed technical explanation
How to think about this question
Azure region pairs are defined by Microsoft with a commitment that platform updates (e.g., OS rollouts) are rolled out to only one region in the pair at a time, with a 24-hour delay between updates. The paired regions are also at least 300 miles apart, which is a design choice to reduce the likelihood of a single natural disaster affecting both. This is enforced at the Azure infrastructure level, not by any user-configurable setting, and is a key differentiator from arbitrary region selection.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-900 question test?
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 ensure that two paired regions are updated sequentially during platform maintenance, reducing the risk of simultaneous failure. They are also physically separated by at least 300 miles to minimize the impact of natural disasters. This meets the company's goal of minimizing simultaneous failure risk from both a major platform update and a widespread natural disaster.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on AZ-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. 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?
medium- A.Availability Zones
- B.Azure Resource Manager
- ✓ C.Azure Paired Regions
- D.Azure Traffic Manager
Why C: 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.
Last reviewed: Jun 11, 2026
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.
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