Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
You develop a serverless application using Azure Functions. The function must process images uploaded to a blob container. You need to ensure the function runs only when a new blob is created, and that it scales out automatically for high upload volumes. Which trigger and hosting plan combination 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
Blob trigger + Consumption plan
Correct. Blob trigger fires on new blobs, and Consumption plan scales out automatically to handle high volumes while charging only for execution time.
B
Distractor review
HTTP trigger + Consumption plan
Incorrect. HTTP trigger requires a client to send an HTTP request; it does not automatically respond to blob uploads.
C
Distractor review
Queue trigger + Consumption plan
Incorrect. This would require adding a separate process to write message to a queue after blob upload, increasing complexity and latency.
D
Distractor review
Timer trigger + Consumption plan
Incorrect. Timer trigger runs on a schedule and would process blobs based on time rather than actual upload events, leading to latency and inefficiency.
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.
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Question 3
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Question 4
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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: Blob trigger + Consumption plan — The Blob storage trigger in Azure Functions automatically runs when a new blob is created in a container. The Consumption plan provides dynamic scaling and billing per execution, ideal for event-driven workloads with unpredictable volume. HTTP trigger would require an external call. Queue trigger would require an intermediary queue. Timer trigger runs on a schedule, not event-driven.
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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