The answer is to use a dedicated App Service plan with Always On enabled, because this configuration directly addresses both cold start latency and the timeout limitations inherent in Azure Functions when processing large CSV files. A dedicated plan keeps the function host continuously loaded, eliminating the cold start delay that would otherwise occur with each file upload, and it provides a default timeout of 30 minutes—configurable up to 230 minutes—which is essential for parsing and inserting rows from a 100 MB CSV file into SQL. On the AZ-204 exam, this scenario tests your understanding of how hosting plans affect performance and scalability, often trapping candidates who default to Consumption or Premium plans without considering the cost-benefit trade-off for predictable, long-running workloads. A key memory tip is to associate "Always On" with "always ready"—if your function needs steady processing time beyond five minutes, think dedicated plan with Always On enabled.
AZ-204 Develop Azure compute solutions Practice Question
This AZ-204 practice question tests your understanding of develop azure compute solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 building a serverless application using Azure Functions. The function processes large CSV files uploaded to Azure Blob Storage. Each file can be up to 100 MB. The function must parse the file and insert each row into a SQL database. You need to minimize cold start latency and ensure the function can handle the processing within the default timeout. What should you do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a dedicated App Service plan with Always On enabled.
Option B is correct because a Dedicated App Service plan with Always On enabled eliminates cold starts by keeping the function host loaded continuously, and it provides a default timeout of 30 minutes (configurable up to 230 minutes), which is sufficient for processing 100 MB CSV files. The Consumption plan has a default timeout of 5 minutes (max 10 minutes), which may not be enough for large file processing, and it suffers from cold starts. The Premium plan reduces cold starts with pre-warmed instances but is not necessary when a Dedicated plan with Always On is more cost-effective and meets the requirements.
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.
✗
Use the Premium plan with pre-warmed instances.
Why it's wrong here
The Premium plan reduces cold starts but is more expensive than the App Service plan.
✓
Use a dedicated App Service plan with Always On enabled.
Why this is correct
Always On keeps the function warm, and the plan allows up to 230 seconds execution time.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Durable Functions to split processing into smaller chunks.
Why it's wrong here
Durable Functions add orchestration overhead; not needed for simple file parsing.
✗
Use the Consumption plan and increase the function timeout to 10 minutes.
Why it's wrong here
Cold starts still occur in the Consumption plan, impacting latency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume the Premium plan with pre-warmed instances is the only way to eliminate cold starts, overlooking that a Dedicated App Service plan with Always On provides the same benefit with a longer default timeout and lower cost for predictable workloads.
Detailed technical explanation
How to think about this question
Under the hood, the Dedicated App Service plan runs the function on dedicated VMs with Always On ensuring the function app is always loaded, eliminating the cold start penalty of loading the runtime and dependencies. The default function timeout in a Dedicated plan is 30 minutes, but it can be extended up to 230 minutes via the functionTimeout setting in host.json, providing ample time for large file processing. In contrast, the Consumption plan has a hard limit of 10 minutes for the functionTimeout, and the Premium plan, while offering pre-warmed instances, incurs higher costs for always-on capacity.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 a dedicated App Service plan with Always On enabled. — Option B is correct because a Dedicated App Service plan with Always On enabled eliminates cold starts by keeping the function host loaded continuously, and it provides a default timeout of 30 minutes (configurable up to 230 minutes), which is sufficient for processing 100 MB CSV files. The Consumption plan has a default timeout of 5 minutes (max 10 minutes), which may not be enough for large file processing, and it suffers from cold starts. The Premium plan reduces cold starts with pre-warmed instances but is not necessary when a Dedicated plan with Always On is more cost-effective and meets the requirements.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.