- A
Set FUNCTIONS_WORKER_RUNTIME to 'dotnet-isolated'
Why wrong: Changing runtime doesn't reduce cold starts.
- B
Migrate from Consumption plan to Premium plan
Premium plan keeps instances warm.
- C
Enable Azure Monitor alerts on function execution count
Why wrong: Alerts are for notification, not mitigation.
- D
Enable Always On in the function app configuration
Why wrong: Always On is for App Service, not Functions.
Question 276 of 997
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.
Your team monitors Azure Functions with Application Insights. After a recent deployment, cold start latency increased. Which feature should you enable to mitigate this?
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
✓
Migrate from Consumption plan to Premium plan
Cold start latency occurs when a function app is idle and needs to be loaded from scratch. The Consumption plan can cause cold starts because it scales to zero when idle. Migrating to the Premium plan eliminates cold starts by keeping instances warm, as it provides pre-warmed workers and always-on instances, reducing latency after deployment.
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.
- ✗
Set FUNCTIONS_WORKER_RUNTIME to 'dotnet-isolated'
Why it's wrong here
Changing runtime doesn't reduce cold starts.
- ✓
Migrate from Consumption plan to Premium plan
Why this is correct
Premium plan keeps instances warm.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable Azure Monitor alerts on function execution count
Why it's wrong here
Alerts are for notification, not mitigation.
- ✗
Enable Always On in the function app configuration
Why it's wrong here
Always On is for App Service, not Functions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Always On' (an App Service setting for continuous web jobs) with Azure Functions cold start mitigation, but 'Always On' is not supported on Consumption or Premium plans, and the correct solution is to use the Premium plan's built-in warm instance support.
Detailed technical explanation
How to think about this question
The Premium plan (Elastic Premium) uses pre-warmed instances that are always ready to handle requests, eliminating the cold start delay caused by the Consumption plan's scale-to-zero behavior. Under the hood, the Premium plan maintains a minimum number of warm instances (configurable via the 'minimum instance count' setting) and uses a dedicated App Service plan with predictable pricing. In real-world scenarios, after a deployment that updates function code, the Premium plan can keep existing instances warm while new instances are provisioned, reducing latency spikes.
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.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Monitor, troubleshoot, and optimize Azure solutions — study guide chapter
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FAQ
Questions learners often ask
What does this AZ-204 question test?
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: Migrate from Consumption plan to Premium plan — Cold start latency occurs when a function app is idle and needs to be loaded from scratch. The Consumption plan can cause cold starts because it scales to zero when idle. Migrating to the Premium plan eliminates cold starts by keeping instances warm, as it provides pre-warmed workers and always-on instances, reducing latency after deployment.
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.
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 →
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Last reviewed: Jul 4, 2026
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