Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
You are developing an Azure Function that uses a Service Bus queue trigger. You need to ensure that the function processes messages one at a time to guarantee order. Which configuration should you use?
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
Best answer
Set the batchSize to 1 in host.json
Correct. This ensures one message per function invocation, maintaining order.
B
Distractor review
Set the maxMessages to 1 in the ServiceBusTrigger attribute
The maxMessages attribute is not valid; the correct configuration is the batchSize property in host.json.
C
Distractor review
Set the function to run on a Premium Plan
The Premium Plan does not automatically guarantee single-message processing; it provides more instances and features but not the batching behavior.
D
Distractor review
Set the maxDequeueCount to 1 in host.json
maxDequeueCount controls the number of times a message can be dequeued before moving to poison queue, not the batch size.
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 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: Set the batchSize to 1 in host.json — Setting the batchSize to 1 in the host.json configuration ensures that each function instance processes only one message at a time. This preserves message order because the function will process messages sequentially from the queue. Without this, multiple messages could be processed in parallel, breaking order guarantees.
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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