The answer is to enable the Always On setting in the App Service configuration. This feature prevents the app pool from being unloaded after a period of inactivity, effectively eliminating cold starts by keeping your application loaded in memory at all times. Since Always On is available on the Basic tier and above, it directly solves the problem of slow initial responses without requiring a plan upgrade. On the AZ-204 exam, this question tests your understanding of App Service scaling and performance optimization, often appearing as a trap where candidates mistakenly consider upgrading to a higher tier or using autoscaling, which does not address cold starts. A common memory tip is to think of Always On as a “no-sleep” switch for your app—if you want it warm, keep it on.
AZ-204 Practice Question: Monitor, troubleshoot, and optimize Azure solutions
This AZ-204 practice question tests your understanding of monitor, troubleshoot, and optimize azure solutions. 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.
You are running an Azure App Service web app on the Basic tier. Users report slow initial responses due to cold starts. You need to keep the app warm without upgrading the hosting plan. Which feature should you enable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable 'Always On' in the App Service configuration.
The 'Always On' feature prevents the App Service from being unloaded after periods of inactivity, eliminating cold starts by keeping the application loaded in memory. This is available on the Basic tier and above, so it solves the problem without requiring a plan upgrade.
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.
✓
Enable 'Always On' in the App Service configuration.
Why this is correct
Always On ensures the app is continuously running, eliminating cold starts. It is available on Basic tier.
Related concept
Read the scenario before looking for a memorised answer.
✗
Upgrade to a Premium plan to get pre-warmed instances.
Why it's wrong here
Upgrading is a valid solution but not allowed per the scenario constraint of not changing the hosting plan.
✗
Implement an auto-scaling rule to maintain a minimum instance count.
Why it's wrong here
Auto-scaling does not prevent cold starts on the existing instance; it only scales out.
✗
Reduce the web app's idle timeout via application code.
Why it's wrong here
The idle timeout is managed by Azure and cannot be changed by application code; idle timeout causes cold starts.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse auto-scaling (which handles load distribution) with keeping a single instance warm, or incorrectly assume that 'Always On' requires a Premium plan when it is actually available from the Basic tier upward.
Trap categories for this question
Scenario analysis trap
Upgrading is a valid solution but not allowed per the scenario constraint of not changing the hosting plan.
Detailed technical explanation
How to think about this question
Under the hood, the Azure App Service sandbox unloads worker processes after 20 minutes of inactivity unless 'Always On' is enabled, which sends a periodic ping (every 5 minutes) to the root of the application to keep the process alive. This feature is enforced at the IIS application pool level, ensuring the worker process remains loaded and responsive. In a real-world scenario, a web app with background jobs or WebJobs also benefits because 'Always On' prevents the entire sandbox from being recycled.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Monitor, troubleshoot, and optimize Azure solutions — This question tests Monitor, troubleshoot, and optimize Azure solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable 'Always On' in the App Service configuration. — The 'Always On' feature prevents the App Service from being unloaded after periods of inactivity, eliminating cold starts by keeping the application loaded in memory. This is available on the Basic tier and above, so it solves the problem without requiring a plan upgrade.
What should I do if I get this AZ-204 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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