AZ-900 Describe Azure architecture and services Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Azure Logic Apps

  Why it's wrong here

  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.

  When this WOULD be correct

  A company needs to orchestrate a workflow that, upon file upload to Blob Storage, sends an email notification and copies the file to another container. The team wants a no-code solution with built-in connectors. In that case, Azure Logic Apps would be the correct answer.

• ✓

  Azure Functions

  Why this is correct

  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.

• ✗

  Azure Container Instances

  Why it's wrong here

  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.

  When this WOULD be correct

  A question where the team needs to run a custom Docker container for data processing, requires fast startup times, and wants to avoid managing underlying VMs but is okay with paying for container uptime (e.g., a batch processing job that runs for a few minutes).

• ✗

  Azure Batch

  Why it's wrong here

  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.

  When this WOULD be correct

  A question where the team needs to run a large number of data processing tasks (e.g., thousands of CSV files) in parallel, with the ability to scale across many VMs, and they are willing to manage compute resources. For example: 'A company needs to process millions of image files using a custom tool, running on a cluster of VMs, with job scheduling and auto-scaling.'

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”