- A
Availability Zones
Why wrong: Availability Zones are physically separate datacenters within a single Azure region. They do not span across two different regions and therefore cannot provide disaster recovery across regions or ensure data remains within a specific geography like the United States.
- B
Region Pairs
Azure region pairs are two Azure regions within the same geography (e.g., East US and West US) that are paired by Microsoft. They offer prioritized disaster recovery (one region is automatically prioritized for recovery) and sequential updates (only one region in the pair is updated during planned maintenance), making them the correct choice.
- C
Resource Groups
Why wrong: Resource Groups are logical containers used to group related Azure resources for management and organization. They do not provide any disaster recovery or maintenance sequencing capabilities across regions.
- D
Azure Policy
Why wrong: Azure Policy is a governance tool used to enforce rules and compliance for resources (e.g., restricting resource locations). It does not address the architectural pairing of regions for recovery or maintenance sequencing.
Quick Answer
The answer is Azure Region Pairs. This feature is correct because Azure pairs regions within the same geography—such as East US with West US—to ensure physical isolation, prioritized disaster recovery, and sequential planned maintenance, meaning only one region in the pair is updated at a time, which keeps all customer data within the United States during a failover. On the AZ-900 exam, this question tests your understanding of how Azure guarantees data residency and high availability through region pairs, often appearing as a scenario where a company must meet regulatory compliance while ensuring recovery priority. A common trap is confusing region pairs with Availability Zones, but remember that zones are within a single region and do not guarantee data stays in a specific country. For a memory tip, think of “paired regions as a two-step dance: one region updates while the other waits, and if one falls, the partner catches you.”
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 US-based financial services company must ensure that all customer data remains within the United States at all times to comply with regulatory requirements. The company plans to replicate its Azure SQL database between two Azure regions for disaster recovery. The solution must guarantee that if a region experiences a major outage, the paired region is prioritized for recovery. Additionally, the solution should ensure that during planned maintenance, only one region in the pair is updated at a time. Which Azure architecture feature should the company use?
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
Region Pairs
Region Pairs are the correct choice because Azure guarantees that each region is paired with another region within the same geography (e.g., East US with West US) to provide physical isolation, prioritized disaster recovery, and sequential planned maintenance updates. This ensures that during an outage, recovery is directed to the paired region, and during maintenance, only one region in the pair is updated at a time, meeting the company's regulatory and availability requirements.
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
Why it's wrong here
Availability Zones are physically separate datacenters within a single Azure region. They do not span across two different regions and therefore cannot provide disaster recovery across regions or ensure data remains within a specific geography like the United States.
- ✓
Region Pairs
Why this is correct
Azure region pairs are two Azure regions within the same geography (e.g., East US and West US) that are paired by Microsoft. They offer prioritized disaster recovery (one region is automatically prioritized for recovery) and sequential updates (only one region in the pair is updated during planned maintenance), making them the correct choice.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Resource Groups
Why it's wrong here
Resource Groups are logical containers used to group related Azure resources for management and organization. They do not provide any disaster recovery or maintenance sequencing capabilities across regions.
- ✗
Azure Policy
Why it's wrong here
Azure Policy is a governance tool used to enforce rules and compliance for resources (e.g., restricting resource locations). It does not address the architectural pairing of regions for recovery or maintenance sequencing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Availability Zones (which protect against datacenter failures within a single region) with Region Pairs (which protect against full region failures and ensure data residency and sequential maintenance), leading them to select Availability Zones for cross-region disaster recovery scenarios.
Detailed technical explanation
How to think about this question
Azure Region Pairs are designed with a minimum of 300 miles of physical separation between paired regions (within the same geography) to reduce the risk of simultaneous outages from natural disasters. During planned maintenance, Azure updates only one region in a pair at a time, ensuring that the other region remains fully operational. For disaster recovery, Azure prioritizes restoring services in the paired region, and data replication between paired regions is typically synchronous for storage and asynchronous for databases like Azure SQL, which can be configured with active geo-replication to meet strict data residency requirements.
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: Region Pairs — Region Pairs are the correct choice because Azure guarantees that each region is paired with another region within the same geography (e.g., East US with West US) to provide physical isolation, prioritized disaster recovery, and sequential planned maintenance updates. This ensures that during an outage, recovery is directed to the paired region, and during maintenance, only one region in the pair is updated at a time, meeting the company's regulatory and availability requirements.
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.
About these practice questions
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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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