AZ-204 Develop Azure compute solutions Practice Question
This AZ-204 practice question tests your understanding of develop azure compute solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
You are designing a solution that uses Azure Functions to process events from Azure Event Hubs. The function must process events in order and exactly once per partition. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the Event Hubs trigger for Azure Functions with default configuration.
The Event Hubs trigger for Azure Functions, by default, processes events in order and exactly once per partition. It uses checkpointing to track the offset of the last successfully processed event, ensuring that each event is processed only once and in sequence within a partition. This default behavior aligns with the requirement without needing additional configuration.
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.
✗
Enable session state in the function app.
Why it's wrong here
Session state is not relevant for Event Hubs.
✗
Use a Service Bus queue trigger with a singleton lock.
Why it's wrong here
Service Bus does not guarantee order across partitions.
✗
Disable checkpointing to ensure no duplicates.
Why it's wrong here
Disabling checkpointing would cause reprocessing on restart.
✓
Use the Event Hubs trigger for Azure Functions with default configuration.
Why this is correct
Event Hubs trigger processes events in order per partition and uses checkpointing for exactly-once.
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 may think they need to manually configure session state or disable checkpointing to achieve ordering and exactly-once processing, but the default Event Hubs trigger already handles this via partition-based ordering and checkpointing.
Detailed technical explanation
How to think about this question
Under the hood, the Event Hubs trigger uses the Event Processor Host (EPH) or the newer EventProcessorClient from the Azure.Messaging.EventHubs library, which manages partition leases and checkpointing via Azure Blob Storage. Checkpoints store the sequence number of the last processed event, so after a restart, the function resumes from that point, ensuring exactly-once processing per partition. In a real-world scenario, if a function crashes after processing an event but before checkpointing, the event may be reprocessed, but this is a trade-off for at-least-once semantics; the default configuration minimizes duplicates while maintaining ordering.
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
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Develop Azure compute solutions — This question tests Develop Azure compute solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the Event Hubs trigger for Azure Functions with default configuration. — The Event Hubs trigger for Azure Functions, by default, processes events in order and exactly once per partition. It uses checkpointing to track the offset of the last successfully processed event, ensuring that each event is processed only once and in sequence within a partition. This default behavior aligns with the requirement without needing additional configuration.
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.
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Question Discussion
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