The answer is a shift from CapEx to OpEx. This is correct because Capital Expenditure (CapEx) involves large upfront purchases of physical assets like servers and storage, which are then depreciated over time, while Operational Expenditure (OpEx) follows a pay-as-you-go model where you pay only for the compute and storage you actually use, typically through a monthly subscription. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of cloud pricing models and financial benefits, often appearing in scenario-based questions about moving from on-premises to cloud. A common trap is confusing OpEx with lower total cost—remember, OpEx shifts spending from a single large payment to ongoing variable costs. Memory tip: think of CapEx as buying a car outright (big upfront cost), and OpEx as leasing it with a monthly payment based on miles driven.
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. A key principle to apply: capEx involves upfront spending on physical infrastructure.. 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 moving from an on-premises data center to the cloud. Previously, they paid a large upfront sum for servers and storage, plus annual maintenance fees. Now they pay a monthly subscription based on the amount of compute and storage they actually use. 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 CapEx to OpEx
This scenario describes a shift from Capital Expenditure (CapEx) to Operational Expenditure (OpEx). CapEx involves upfront purchases of physical assets like servers and storage, which are capitalized and depreciated over time. OpEx, on the other hand, is a pay-as-you-go model where costs are incurred based on actual usage, such as monthly cloud subscription fees for compute and storage resources.
Key principle: CapEx involves upfront spending on physical infrastructure.
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 CapEx to OpEx
Why this is correct
Correct. The move from upfront hardware purchases (CapEx) to monthly usage-based billing (OpEx) is a fundamental benefit of cloud computing.
Related concept
CapEx involves upfront spending on physical infrastructure.
✗
From OpEx to CapEx
Why it's wrong here
This reverses the direction. The scenario describes moving away from CapEx to OpEx.
✗
From direct cost to indirect cost
Why it's wrong here
These terms are not used to describe the shift in cloud spending. The key distinction is CapEx vs OpEx.
✗
From variable cost to fixed cost
Why it's wrong here
Cloud spending is variable (pay for what you use), whereas on-premises often involves fixed costs plus variable maintenance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing the direction of the shift—candidates may incorrectly think moving from upfront payments to monthly subscriptions is from OpEx to CapEx, but OpEx is the ongoing operational cost, not the initial capital outlay.
Trap categories for this question
Scenario analysis trap
This reverses the direction. The scenario describes moving away from CapEx to OpEx.
Detailed technical explanation
How to think about this question
Under the hood, CapEx involves purchasing hardware like Dell PowerEdge servers or NetApp storage arrays, which are depreciated over 3-5 years using methods like straight-line depreciation. OpEx in the cloud, such as Azure VM instances or Azure Blob Storage, is billed per second or per hour via consumption meters, enabling elastic scaling without upfront capital. A real-world scenario: a company migrating from a $100,000 server purchase (CapEx) to a $5,000/month Azure subscription (OpEx) can adjust resources dynamically based on demand, avoiding overprovisioning.
KKey Concepts to Remember
CapEx involves upfront spending on physical infrastructure.
OpEx involves paying for services as you consume them.
Cloud computing primarily shifts IT spending from CapEx to OpEx.
OpEx allows for greater financial flexibility and scalability.
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
CapEx involves upfront spending on physical infrastructure.
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 — CapEx involves upfront spending on physical infrastructure..
What is the correct answer to this question?
The correct answer is: From CapEx to OpEx — This scenario describes a shift from Capital Expenditure (CapEx) to Operational Expenditure (OpEx). CapEx involves upfront purchases of physical assets like servers and storage, which are capitalized and depreciated over time. OpEx, on the other hand, is a pay-as-you-go model where costs are incurred based on actual usage, such as monthly cloud subscription fees for compute and storage resources.
What should I do if I get this AZ-900 question wrong?
Review capEx involves upfront spending on physical infrastructure., then practise related AZ-900 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
CapEx involves upfront spending on physical infrastructure.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is moving from an on-premises data center to the cloud. Previously, they paid a large upfront sum for hardware and then annual maintenance fees. Now they pay a monthly subscription based on actual usage of compute and storage. This shift represents moving from which type of expenditure to which?
easy
A.From OpEx to CapEx
✓ B.From CapEx to OpEx
C.From variable to fixed costs
D.From direct to indirect costs
Why B: Option B is correct because the scenario describes a shift from paying a large upfront sum for hardware (a capital expenditure, or CapEx) to a monthly subscription based on actual usage (an operational expenditure, or OpEx). In cloud computing, CapEx involves significant upfront costs for physical infrastructure, while OpEx involves ongoing, pay-as-you-go costs for services like compute and storage. This transition is a fundamental benefit of cloud adoption, allowing organizations to avoid large initial investments and instead pay for what they consume.
Variation 2. A company is moving its on-premises data center to the cloud. Previously, they purchased servers and paid for maintenance. Now they pay a monthly subscription for compute and storage based on actual usage. This is an example of shifting from capital expenditure (CapEx) to which type of expenditure?
easy
✓ A.Operating expenditure (OpEx)
B.Variable expenditure
C.Direct expenditure
D.Indirect expenditure
Why A: This scenario describes a shift from upfront capital investment in physical servers and maintenance (CapEx) to a pay-as-you-go model where costs are incurred based on actual usage. In cloud computing, this is the definition of operating expenditure (OpEx), as the company pays a recurring monthly subscription for compute and storage resources rather than making a large initial purchase.
Last reviewed: Jun 11, 2026
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