Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company's data engineering team needs to process CSV files that are uploaded to an Azure Blob Storage container. For each uploaded file, the team must run a custom Python script to clean and transform the data. The team wants a solution that automatically triggers the script upon file upload, does not require them to manage any virtual machines or containers, and charges only when code executes. Which Azure service should the team 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
Distractor review
Azure Logic Apps
Azure Logic Apps is a workflow automation service that uses pre-built connectors to orchestrate tasks. It can trigger on blob uploads, but it is designed for integrating services and managing workflows, not for running custom Python scripts directly. To execute Python code within Logic Apps, you would need a separate compute service like Azure Functions, making this an indirect and less optimal choice.
B
Best answer
Azure Functions
Azure Functions is a serverless compute service that supports multiple languages, including Python. It can be triggered by Azure Blob Storage events (e.g., a new blob created) to automatically run the function code. The consumption plan bills only for the execution time, and there is no infrastructure to manage. This matches all the requirements perfectly.
C
Distractor review
Azure Container Instances
Azure Container Instances (ACI) allows you to run containers without managing servers, but it does not natively support event-driven triggers like blob uploads. You would need an external service (e.g., Azure Functions or Logic Apps) to invoke the container, which adds complexity and cost. Additionally, ACI charges for the entire duration the container runs, not per execution.
D
Distractor review
Azure Batch
Azure Batch is a job scheduling service for running large-scale parallel and high-performance computing (HPC) workloads. It is designed for batch processing of many tasks, not for executing a single script in response to an event. While you could potentially use it, it would be overly complex and costly for the simple, event-driven file processing described.
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.
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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
A developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?
Question 2
A solutions architect is designing a storage solution for a large media company. The company needs to store video files that are accessed infrequently but must be retained for several years for compliance. Which two Azure storage options meet these requirements? (Select two.)
Question 3
A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?
Question 4
A company wants to enforce a set of security policies across all their Azure subscriptions. They have created several individual policy definitions. Which Azure construct should they use to group these policies together and assign them as a single package?
Question 5
A company deploys a line-of-business application on an Azure virtual machine. The IT team wants to ensure the application remains secure. According to the shared responsibility model, which of the following security tasks is the sole responsibility of the customer (the company)?
Question 6
A company develops a web API that runs on Azure App Service. The development team wants to deploy a new version of the API to a staging environment, run integration tests against it, and then gradually shift production traffic to the new version. If any issues are detected, they want to immediately roll back to the previous version without redeploying. Which Azure App Service feature should the team use to meet these requirements?
FAQ
Questions learners often ask
What does this AZ-900 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Azure Functions — Azure Functions is the ideal serverless compute service for event-driven processing. It can be triggered by a Blob Storage event, runs custom Python scripts, and the consumption plan ensures you pay only for the time your code executes. Azure Logic Apps is more suited for orchestrating workflows using connectors, not for running custom code like Python. Azure Container Instances runs containers but lacks a native event trigger for blobs and requires additional components for orchestration. Azure Batch is designed for large-scale parallel compute jobs, not for individual event-driven file processing.
What should I do if I get this AZ-900 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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