- A
Application Insights
Provides detailed application performance monitoring.
- B
App Service diagnostics (Diagnose and Solve Problems)
Built-in tool for common App Service issues.
- C
Azure Monitor for VMs
Why wrong: Azure Monitor for VMs is for virtual machines, not App Service.
- D
Azure SQL Analytics
Why wrong: Azure SQL Analytics is for Azure SQL Database, not App Service.
- E
Kudu console for logging and debugging
Kudu provides file system access and logs.
Question 734 of 997
Diagnose Azure App Service Performance Issues
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.
Which THREE tools can you use to diagnose performance issues in an Azure App Service? (Choose three.)
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
✓
Application Insights
Application Insights is a feature of Azure Monitor that provides application performance management (APM) and telemetry for live web applications. It automatically detects performance anomalies, includes powerful analytics tools to help diagnose issues, and allows you to understand how an app is performing and being used. For an Azure App Service, you can enable Application Insights with just a few clicks to start collecting request rates, response times, failure rates, and dependency tracking.
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.
- ✓
Application Insights
Why this is correct
Provides detailed application performance monitoring.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
App Service diagnostics (Diagnose and Solve Problems)
Why this is correct
Built-in tool for common App Service issues.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Azure Monitor for VMs
Why it's wrong here
Azure Monitor for VMs is for virtual machines, not App Service.
- ✗
Azure SQL Analytics
Why it's wrong here
Azure SQL Analytics is for Azure SQL Database, not App Service.
- ✓
Kudu console for logging and debugging
Why this is correct
Kudu provides file system access and logs.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Monitor for VMs with the general Azure Monitor platform, mistakenly thinking it applies to all Azure resources, when in fact it is VM-specific and cannot diagnose PaaS-level App Service issues.
Detailed technical explanation
How to think about this question
Under the hood, Application Insights uses a distributed tracing model based on the OpenTelemetry standard, correlating telemetry across components via a unique operation ID. The Kudu console, accessible via the SCM endpoint (e.g., https://yoursite.scm.azurewebsites.net), provides direct file system access, process dump analysis, and real-time log streaming using the 'tail' command or the Azure CLI 'az webapp log tail' — essential for debugging startup errors or HTTP 500s. App Service diagnostics leverages a built-in diagnostic engine that runs rule-based checks (e.g., CPU threshold, memory pressure, slow HTTP responses) and presents a guided troubleshooting experience with live metrics and historical data.
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.
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: Application Insights — Application Insights is a feature of Azure Monitor that provides application performance management (APM) and telemetry for live web applications. It automatically detects performance anomalies, includes powerful analytics tools to help diagnose issues, and allows you to understand how an app is performing and being used. For an Azure App Service, you can enable Application Insights with just a few clicks to start collecting request rates, response times, failure rates, and dependency tracking.
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
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Last reviewed: Jul 4, 2026
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