Quick Answer
The correct answer is Autoscale rules because they are the native Azure feature designed to scale Azure App Service automatically based on CPU usage. Autoscale rules allow you to define conditions—such as when average CPU percentage exceeds a threshold—that trigger scale-out actions, adding more instances to handle increased load without manual intervention. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this concept tests your understanding of scaling strategies for PaaS services, often appearing in scenario-based questions where you must distinguish between scaling and load balancing. A common trap is confusing Autoscale with Azure Load Balancer, which only distributes traffic across existing instances and does not add or remove them. Remember: Autoscale rules handle scaling, while load balancers handle distribution. A helpful memory tip is "CPU climbs, Autoscale adds instances—no manual, no drama."
This AZ-305 practice question tests your understanding of design infrastructure solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 is deploying a web application that must scale out automatically based on CPU usage. The application runs on Azure App Service. Which Azure feature should they configure?
Autoscale rules
Autoscale rules scale App Service based on metrics like CPU.
Azure Front Door
Why wrong: Front Door provides global load balancing, not application-level autoscaling.
Azure Load Balancer
Why wrong: Load balancer distributes traffic, does not scale.
Azure Traffic Manager
Why wrong: Traffic Manager provides DNS-based routing, not autoscaling.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Autoscale rules
Autoscale rules in App Service can scale out based on CPU percentage. Option A is wrong because Azure Load Balancer distributes traffic but does not scale. Option B is wrong because Traffic Manager is for global routing. Option C is wrong because Azure Front Door is for global load balancing with acceleration.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Autoscale rules
Why this is correct
Autoscale rules scale App Service based on metrics like CPU.
Related concept
Read the scenario before looking for a memorised answer.
Azure Front Door
Why it's wrong here
Front Door provides global load balancing, not application-level autoscaling.
Azure Load Balancer
Why it's wrong here
Load balancer distributes traffic, does not scale.
Azure Traffic Manager
Why it's wrong here
Traffic Manager provides DNS-based routing, not autoscaling.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Autoscale rules — Autoscale rules in App Service can scale out based on CPU percentage. Option A is wrong because Azure Load Balancer distributes traffic but does not scale. Option B is wrong because Traffic Manager is for global routing. Option C is wrong because Azure Front Door is for global load balancing with acceleration.
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This AZ-305 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-305 exam.
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