Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
You are monitoring a web application with Application Insights. The application occasionally returns HTTP 500 errors. You want to be notified immediately when the error rate exceeds 5% of all requests in a rolling 5-minute window. Which feature of Application Insights should you configure?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Create a Smart Detection rule for anomalous failures.
Smart Detection analyzes telemetry over time and raises alerts for anomalies, but it does not allow you to set a fixed threshold like 5%. It is AI-based and not configurable with specific percentages.
B
Distractor review
Create a metric alert on the 'Failed requests' metric with a threshold of 5%.
Metric alerts work on single metrics (e.g., count of failed requests), not on a ratio. To monitor percentage of failed requests, you need a log alert that calculates the ratio.
C
Best answer
Create a log alert using a Kusto query that calculates the percentage of failed requests over the last 5 minutes, with an alert condition when the result exceeds 0.05.
Log alerts allow complex queries. For example: 'requests | where timestamp > ago(5m) | summarize total=count(), failures=countif(success == false) | extend percent = failures * 100.0 / total | where percent > 5'. This triggers an alert when the condition is met.
D
Distractor review
Create an availability test that checks for HTTP 200 responses and alert on failures.
Availability tests are for probing endpoints from external locations. They do not measure error rates within the application's traffic.
Common exam trap
Common exam trap: answer the scenario, not the keyword
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.
Technical deep dive
How to think about this question
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.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
Related practice questions
Related AZ-204 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 3
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Question 4
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Question 5
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Question 6
You are monitoring an Azure App Service using Application Insights. You notice that the server response time is high for certain requests. You need to drill down to see which external dependencies (like databases or APIs) are causing the delay. Which Application Insights feature should you use?
FAQ
Questions learners often ask
What does this AZ-204 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Create a log alert using a Kusto query that calculates the percentage of failed requests over the last 5 minutes, with an alert condition when the result exceeds 0.05. — Application Insights allows you to create metric alerts based on custom log searches or metric-based conditions. For a condition like 'error rate > 5% over 5 minutes', you can create a log alert using a Kusto query that calculates the error percentage, and set the threshold accordingly. This provides real-time notification.
What should I do if I get this AZ-204 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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