The answer is Azure Batch. This is the correct choice because Azure Batch is purpose-built for large-scale parallel and high-performance computing workloads that require hundreds of VMs for a few hours, exactly matching the nightly processing requirement. It automatically provisions the compute nodes, distributes the batch job across them, and then deallocates all resources upon completion, so you only pay for the compute time used. On the AZ-900 exam, this question tests your understanding of which Azure service handles dynamic, short-lived, high-scale compute jobs versus always-on services like Virtual Machine Scale Sets or Azure Functions. A common trap is choosing VM Scale Sets, but those are designed for persistent, auto-scaled applications, not for terminating after a few hours. Remember the memory tip: “Batch is a batch of VMs that come and go—just like a batch of cookies, they’re created, used, and then cleaned up.”
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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.
A company needs to run a batch job that processes large amounts of data nightly. The job requires hundreds of VMs for a few hours and then terminates. Which Azure service is BEST suited for this workload?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Batch
Azure Batch is designed specifically for large-scale parallel and high-performance computing (HPC) workloads that require hundreds of VMs for a short duration. It automatically provisions, manages, and deallocates the VMs, scaling to the required number of nodes, running the batch job, and then terminating them—matching the nightly processing requirement exactly.
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.
✗
Azure Virtual Machine Scale Sets
Why it's wrong here
Scale Sets manage VM scaling but require manual orchestration of batch job logic.
✓
Azure Batch
Why this is correct
Azure Batch is designed exactly for large-scale parallel batch workloads with automatic VM pool management.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Functions
Why it's wrong here
Azure Functions are for event-driven, short-duration tasks — not large-scale VM-based batch jobs.
✗
Azure Container Instances
Why it's wrong here
ACI runs individual containers on demand but lacks the batch orchestration capabilities of Azure Batch.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Virtual Machine Scale Sets with Azure Batch, but Scale Sets only handle VM scaling and not the job scheduling, task distribution, or automatic termination that Batch provides for ephemeral HPC workloads.
Detailed technical explanation
How to think about this question
Azure Batch uses a pool of compute nodes (VMs) that can be configured with a start task to install dependencies, and jobs are divided into tasks that run on these nodes. Under the hood, Batch leverages the Azure Batch service API to manage node allocation, task scheduling, and automatic cleanup—including the ability to use low-priority VMs for cost savings, which can be evicted but are ideal for fault-tolerant batch processing. A real-world scenario is rendering frames for a movie studio, where thousands of VMs are needed for a few hours each night and must be deallocated to control costs.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Batch — Azure Batch is designed specifically for large-scale parallel and high-performance computing (HPC) workloads that require hundreds of VMs for a short duration. It automatically provisions, manages, and deallocates the VMs, scaling to the required number of nodes, running the batch job, and then terminating them—matching the nightly processing requirement exactly.
What should I do if I get this AZ-900 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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