AZ-900 Describe cloud concepts Practice Question
A company transitions from on-premises IT, where they purchased servers upfront, to Azure, where they pay a monthly subscription for virtual machines. This is an example of moving from capital expenditure (CapEx) to which type of expenditure?
⚠ Common exam trap
Test-takers frequently confuse the pricing model (consumption-based) with the expenditure type (OpEx), or incorrectly assume 'variable expenditure' is a valid accounting term, when Azure specifically categorizes this as operating expenditure under standard financial reporting.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Operating expenditure (OpEx)
Moving from purchasing servers upfront (CapEx) to paying a monthly subscription for Azure virtual machines shifts costs to an operational expense (OpEx). This is because Azure's pay-as-you-go model charges for compute resources as they are consumed, with no large initial investment, aligning with OpEx accounting where costs are incurred and deducted in the same period.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Operating expenditure (OpEx)
Why this is correct
Operating expenditure (OpEx) is the correct classification for cloud subscription fees because they are ongoing costs incurred to run the business during the current billing period. Unlike purchasing physical hardware, which is capitalized as a fixed asset and depreciated over time, cloud services are expensed as incurred. This shift from capital expenditure (CapEx) to OpEx is a primary financial benefit of moving to the cloud, allowing more flexible budgeting and aligning costs directly with usage.
- ✗
Variable expenditure
Why it's wrong here
Variable expenditure is not the standard accounting term for this transition. While cloud costs can vary based on consumption, 'variable' refers to cost behavior (how costs change with activity levels), not the expenditure type. The correct classification is operating expenditure (OpEx), which specifically replaces the capital expenditure (CapEx) incurred when purchasing on-premises hardware. Therefore, even though variability exists, it does not define the accounting categorization.
When this WOULD be correct
If a question asks about a cost that changes based on usage (e.g., 'A company pays for cloud resources only when they are used, with no fixed monthly fee'), then 'Variable expenditure' could be correct, though 'Consumption-based' is more precise.
- ✗
Consumption-based expenditure
Why it's wrong here
Consumption-based expenditure is not an accounting category; it describes a pricing model in which you pay only for the resources you use. While cloud services often employ consumption-based pricing, the resulting costs are still classified as operating expenditures (OpEx) for accounting purposes. This option confuses the pricing mechanism with the financial classification, which is why it is incorrect.
When this WOULD be correct
A question that asks: 'A company uses Azure Functions and pays only for the execution time of their code, with no upfront costs. This is an example of which type of expenditure?' In that scenario, 'Consumption-based expenditure' would be correct because it emphasizes paying only for resources consumed.
- ✗
Fixed expenditure
Why it's wrong here
Fixed expenditure is incorrect because cloud subscription fees are typically not fixed; they fluctuate based on the services consumed and the pricing tier selected. Fixed expenditure implies a constant, predetermined cost regardless of usage, which is not characteristic of most cloud models. Moreover, the question asks about the type of expenditure, not the cost behavior—the correct answer is operating expenditure (OpEx), which is variable in nature, not fixed.
When this WOULD be correct
A question describing a scenario where a company signs a long-term contract for a reserved instance or a fixed-price support plan, where the cost remains constant over the period, would make 'Fixed expenditure' the correct answer.
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.
✓Operating expenditure (OpEx)Correct answer▾
Why this is correct
Operating expenditure (OpEx) is the correct classification for cloud subscription fees because they are ongoing costs incurred to run the business during the current billing period. Unlike purchasing physical hardware, which is capitalized as a fixed asset and depreciated over time, cloud services are expensed as incurred. This shift from capital expenditure (CapEx) to OpEx is a primary financial benefit of moving to the cloud, allowing more flexible budgeting and aligning costs directly with usage.
✗Variable expenditureWrong answer — click to see why▾
Why this is wrong here
Variable expenditure is not a standard IT financial term; the correct counterpart to CapEx in cloud computing is OpEx, which covers ongoing operational costs like subscriptions.
★ When this WOULD be the correct answer
If a question asks about a cost that changes based on usage (e.g., 'A company pays for cloud resources only when they are used, with no fixed monthly fee'), then 'Variable expenditure' could be correct, though 'Consumption-based' is more precise.
Why candidates choose this
Candidates may confuse 'variable' with 'operational' because cloud costs can vary month to month, but the standard classification in Azure is CapEx vs. OpEx.
✗Consumption-based expenditureWrong answer — click to see why▾
Why this is wrong here
The question specifically contrasts upfront server purchases (CapEx) with monthly subscription payments for virtual machines, which is the definition of moving to OpEx. 'Consumption-based expenditure' is not a standard financial term; Azure's consumption-based model is a subset of OpEx, but the direct counterpart to CapEx in this context is OpEx.
★ When this WOULD be the correct answer
A question that asks: 'A company uses Azure Functions and pays only for the execution time of their code, with no upfront costs. This is an example of which type of expenditure?' In that scenario, 'Consumption-based expenditure' would be correct because it emphasizes paying only for resources consumed.
Why candidates choose this
Candidates may confuse 'consumption-based' with OpEx because Azure often markets its pay-as-you-go model as consumption-based, leading them to select this option without recognizing that OpEx is the broader financial category.
✗Fixed expenditureWrong answer — click to see why▾
Why this is wrong here
Fixed expenditure implies a constant, predictable cost regardless of usage, but Azure's subscription model is not fixed; it varies based on the resources consumed and can be adjusted.
★ When this WOULD be the correct answer
A question describing a scenario where a company signs a long-term contract for a reserved instance or a fixed-price support plan, where the cost remains constant over the period, would make 'Fixed expenditure' the correct answer.
Why candidates choose this
Candidates may mistakenly think that a monthly subscription fee is a fixed cost, similar to a fixed monthly bill, without realizing that Azure usage can scale up or down, making the actual expenditure variable.
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?”
Go deeper
Related to this question
Learn chapter
The Shared Responsibility Model
Key term
CapEx
CapEx (Capital Expenditure) is the money a company spends upfront to buy, build, or improve physical assets like servers, buildings, or equipment, which are then owned and depreciated over time.
Key term
OpEx
Operational Expenditure (OpEx) is the ongoing cost for running a business, like paying for cloud services monthly instead of buying hardware upfront.
About these practice questions
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 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-900 exam.