Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
You are implementing an order processing system using Azure Durable Functions. The function must send notifications to multiple channels (email, SMS, push) in parallel and wait for all to complete before sending a confirmation. Which Durable Functions feature should you utilize?
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
Orchestration trigger with fan-out/fan-in pattern
Correct. The orchestrator can call multiple activity functions in parallel using Task.WhenAll, then aggregate results before proceeding.
B
Distractor review
Entity trigger
Incorrect. Entity triggers are used for stateful entities, not for parallel processing and aggregation.
C
Distractor review
Activity trigger with retry policy
Incorrect. Activity triggers execute a single task; retry policies handle failures but do not enable parallel execution.
D
Distractor review
Timer trigger
Incorrect. Timer triggers are based on schedules and not designed for orchestrating parallel tasks.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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.
Question 1
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Question 3
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Question 4
You are developing a web app that authenticates users via Microsoft Entra ID. The app needs to read the user's profile and send emails on their behalf. You want to minimize user consent prompts. Which OAuth 2.0 grant type should you use?
Question 5
You are developing an Azure Function that processes messages from an Azure Service Bus queue. The function uses a Service Bus queue trigger and runs on a Consumption Plan. The queue receives a high volume of messages in bursts. You need to ensure that the function scales out to handle the load but does not exceed 10 concurrent instances. Which configuration should you apply?
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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Orchestration trigger with fan-out/fan-in pattern — The fan-out/fan-in pattern in Durable Functions allows an orchestrator function to call multiple activity functions in parallel and then aggregate the results. This is ideal for scenarios where independent tasks must all complete before proceeding. Other options do not provide parallel execution with aggregation: Entity triggers are for stateful objects, Activity triggers with retry handle failures but not parallelism, and Timer triggers are for delays.
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.
Discussion
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