- A
Elasticity
Why wrong: Elasticity is the ability to automatically scale resources up or down based on demand. This scenario focuses on geographic redundancy and failover, not on scaling compute capacity to handle variable loads.
- B
High availability
High availability ensures that applications remain operational despite failures, such as datacenter outages. Using multiple Azure regions with automatic traffic routing is a common pattern to achieve high availability.
- C
Cost reduction
Why wrong: Cloud cost reduction typically refers to the consumption-based pricing model where you pay only for what you use, avoiding upfront hardware investments. While redundancy may increase costs, the scenario's primary purpose is fault tolerance, not cost savings.
- D
Security
Why wrong: Security in cloud computing involves protecting data, applications, and infrastructure from threats. Although Traffic Manager can be part of a secure architecture, the described configuration does not address security controls like encryption, identity, or threat protection.
AZ-900 Describe cloud concepts Practice Question
This AZ-900 practice question tests your understanding of describe cloud concepts. 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 company runs a critical web application on Azure virtual machines. To ensure the application remains accessible even if an entire Azure datacenter becomes unavailable due to a power outage, the company deploys virtual machines in two different Azure regions and uses Azure Traffic Manager to automatically route traffic to the healthy region. Which benefit of cloud computing does this configuration primarily demonstrate?
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
High availability
This configuration demonstrates high availability because it uses Azure Traffic Manager to route traffic across two Azure regions, ensuring the application remains accessible even if an entire datacenter fails. High availability focuses on minimizing downtime by eliminating single points of failure, which is exactly what deploying VMs in multiple regions with traffic routing achieves.
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.
- ✗
Elasticity
Why it's wrong here
Elasticity is the ability to automatically scale resources up or down based on demand. This scenario focuses on geographic redundancy and failover, not on scaling compute capacity to handle variable loads.
- ✓
High availability
Why this is correct
High availability ensures that applications remain operational despite failures, such as datacenter outages. Using multiple Azure regions with automatic traffic routing is a common pattern to achieve high availability.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Cost reduction
Why it's wrong here
Cloud cost reduction typically refers to the consumption-based pricing model where you pay only for what you use, avoiding upfront hardware investments. While redundancy may increase costs, the scenario's primary purpose is fault tolerance, not cost savings.
- ✗
Security
Why it's wrong here
Security in cloud computing involves protecting data, applications, and infrastructure from threats. Although Traffic Manager can be part of a secure architecture, the described configuration does not address security controls like encryption, identity, or threat protection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse high availability with elasticity, thinking that automatically routing traffic to another region is a form of scaling, but high availability specifically addresses fault tolerance and uptime, not dynamic resource adjustment.
Trap categories for this question
Scenario analysis trap
Elasticity is the ability to automatically scale resources up or down based on demand. This scenario focuses on geographic redundancy and failover, not on scaling compute capacity to handle variable loads.
Detailed technical explanation
How to think about this question
Azure Traffic Manager uses DNS-based traffic routing with health probes (HTTP/HTTPS/TCP) to detect region failures and automatically fail over to the healthy region. Under the hood, it relies on a global DNS server that responds with the endpoint IP of the healthy region based on the configured routing method (e.g., priority, performance, geographic). In a real-world scenario, if the primary region's VMs become unreachable due to a power outage, Traffic Manager's health probes detect the failure within the probe interval (default 30 seconds) and update DNS records to direct traffic to the secondary region, achieving an RTO of minutes.
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
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: High availability — This configuration demonstrates high availability because it uses Azure Traffic Manager to route traffic across two Azure regions, ensuring the application remains accessible even if an entire datacenter fails. High availability focuses on minimizing downtime by eliminating single points of failure, which is exactly what deploying VMs in multiple regions with traffic routing achieves.
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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