Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
You have an Azure Function with a Service Bus queue trigger. The function processes messages that must be handled in order within each partition of the queue. You need to ensure that the function does not process multiple messages from the same partition concurrently, while still allowing parallel processing across different partitions. Which setting 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
Set the batch size to 1 in the function configuration.
Setting batch size to 1 reduces throughput but does not prevent concurrent processing of messages from the same partition across multiple instances.
B
Best answer
Set the maxConcurrentCallsPerSession to 1, or use a session-enabled queue and set maxConcurrentSessions to 1 if using sessionId.
This setting limits the number of concurrent calls per partition/session, ensuring sequential processing within a partition while allowing parallel processing across partitions.
C
Distractor review
Use a consumption plan, which automatically limits concurrency.
The consumption plan scales out instances, increasing concurrency across partitions but does not control per-partition concurrency.
D
Distractor review
Use a queue trigger instead of a Service Bus trigger.
Queue triggers do not support partitioned ordering. Service Bus is the appropriate choice for ordered processing.
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
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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 maxConcurrentCallsPerSession to 1, or use a session-enabled queue and set maxConcurrentSessions to 1 if using sessionId. — The Service Bus trigger in Azure Functions has a property 'MaxConcurrentCallsPerSession' (or similar) to control concurrency per partition (session). By setting this to 1, you ensure messages from the same partition are processed one at a time, while other partitions can still be processed concurrently. Batch size affects how many messages are fetched at once, but does not guarantee ordering within a partition.
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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