The correct answer is moving from capital expenditure (CapEx) to operational expenditure (OpEx). This is correct because CapEx involves large upfront costs for physical assets like servers and networking hardware, which depreciate over time and require ongoing maintenance, whereas OpEx is a pay-as-you-go model where you pay a monthly fee based on actual usage, shifting financial risk to the cloud provider. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of the consumption-based model and how it contrasts with traditional on-premises spending—a common trap is confusing OpEx with subscription licensing or forgetting that CapEx includes depreciation. A useful memory tip: think of CapEx as "Capital Expense—you buy the cow," and OpEx as "Operational Expense—you rent the milk."
AZ-900 Describe cloud concepts Practice Question
This AZ-900 practice question tests your understanding of describe cloud concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is considering moving its IT infrastructure to the cloud. The CFO wants to understand the financial impact: instead of purchasing servers and paying for maintenance, the company will pay a monthly fee based on usage. This shift represents moving from which type of expenditure to which?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
From capital expenditure (CapEx) to operational expenditure (OpEx)
This shift represents moving from capital expenditure (CapEx) to operational expenditure (OpEx). CapEx involves upfront costs for physical assets like servers, which depreciate over time, while OpEx involves ongoing, usage-based payments for cloud services. In Azure, this aligns with the consumption-based model where you pay only for resources consumed (e.g., VM hours, storage GBs), eliminating large initial investments and shifting financial risk to the provider.
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.
✓
From capital expenditure (CapEx) to operational expenditure (OpEx)
Why this is correct
This is the classic financial model shift in cloud computing, where upfront hardware costs are replaced by ongoing operational costs.
Related concept
Read the scenario before looking for a memorised answer.
✗
From operational expenditure (OpEx) to capital expenditure (CapEx)
Why it's wrong here
Moving to cloud reduces CapEx and increases OpEx, not the other way around.
✗
From direct expenditure to indirect expenditure
Why it's wrong here
This is not a standard classification in cloud economics; the correct terms are CapEx and OpEx.
✗
From variable expenditure to fixed expenditure
Why it's wrong here
Cloud shifts fixed upfront costs to variable usage-based costs, so it's the opposite.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the financial terms and select 'From OpEx to CapEx' (Option B) because they mistakenly think cloud costs are capital expenses due to long-term commitments like Reserved Instances, but the core shift is from upfront hardware purchases (CapEx) to ongoing service payments (OpEx).
Detailed technical explanation
How to think about this question
Under the hood, Azure uses a resource consumption metering system that tracks usage at the resource provider level (e.g., Microsoft.Compute for VMs) and bills via the Azure Billing API. CapEx includes depreciation schedules (e.g., 3-5 years for servers under MACRS), while OpEx in Azure is realized through monthly invoices that can be optimized with Reserved Instances (RI) or Azure Hybrid Benefit, which blend fixed and variable costs. A real-world scenario: a company migrating from on-premises Hyper-V to Azure VMs shifts from CapEx (server hardware) to OpEx (VM compute hours), but using RIs for 1 or 3 years introduces a partial CapEx-like commitment within the OpEx model.
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-900 question in full detail.
Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: From capital expenditure (CapEx) to operational expenditure (OpEx) — This shift represents moving from capital expenditure (CapEx) to operational expenditure (OpEx). CapEx involves upfront costs for physical assets like servers, which depreciate over time, while OpEx involves ongoing, usage-based payments for cloud services. In Azure, this aligns with the consumption-based model where you pay only for resources consumed (e.g., VM hours, storage GBs), eliminating large initial investments and shifting financial risk to the provider.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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