The answer is operational expenditure (OpEx). Cloud computing converts infrastructure costs from capital expenditure (CapEx) to OpEx because you pay for compute, storage, and networking resources on a consumption-based model, meaning you only pay for what you use rather than purchasing physical hardware upfront. This shift eliminates large upfront investments and aligns costs directly with actual usage, reducing financial risk. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of the core financial benefits of cloud adoption—specifically how moving from CapEx to OpEx improves cash flow and scalability. A common trap is confusing reserved instances or prepaid plans as CapEx, but remember that even those are still OpEx because you are paying for a service, not owning hardware. Memory tip: think “pay-as-you-go” equals OpEx, while “buy-it-now” equals CapEx.
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.
Which type of expenditure does cloud computing convert infrastructure costs into?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Operational expenditure (OpEx)
Cloud computing converts infrastructure costs from capital expenditure (CapEx) to operational expenditure (OpEx) because you pay for compute, storage, and networking resources on a consumption-based model (pay-as-you-go) rather than purchasing physical hardware upfront. This shift allows organizations to avoid large upfront investments and instead pay for only what they use, aligning costs with actual usage and reducing financial risk.
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.
Cloud converts upfront CapEx hardware purchases into recurring OpEx (monthly service fees) based on consumption.
Related concept
Read the scenario before looking for a memorised answer.
✗
Research and development expenditure (R&D)
Why it's wrong here
Cloud spending is operational cost, not research and development.
✗
Capital and operational expenditure equally
Why it's wrong here
Cloud primarily converts CapEx to OpEx; some Reserved Instance purchases have upfront costs but billing is still OpEx.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CapEx with OpEx, mistakenly thinking cloud still involves significant upfront costs (like reserved instances), but the core concept tested is the fundamental shift from buying hardware (CapEx) to paying for services (OpEx) on a consumption basis.
Detailed technical explanation
How to think about this question
Under the hood, cloud providers like Azure use virtualization and hypervisors (e.g., Hyper-V) to abstract physical hardware, enabling multi-tenancy and resource pooling. The consumption-based billing model relies on metering APIs that track resource usage per second or per hour, allowing granular cost allocation. In a real-world scenario, a company migrating from on-premises to Azure eliminates the need for 3-5 year hardware depreciation schedules, instead paying monthly for VMs, storage, and network egress based on actual usage, which improves cash flow and scalability.
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: Operational expenditure (OpEx) — Cloud computing converts infrastructure costs from capital expenditure (CapEx) to operational expenditure (OpEx) because you pay for compute, storage, and networking resources on a consumption-based model (pay-as-you-go) rather than purchasing physical hardware upfront. This shift allows organizations to avoid large upfront investments and instead pay for only what they use, aligning costs with actual usage and reducing financial risk.
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.
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. Which statement correctly describes the operational cost model of cloud computing?
medium
A.You make large upfront investments in hardware that you own and depreciate
✓ B.You pay for cloud resources only when you consume them, on a recurring basis
C.You purchase cloud capacity in bulk at the beginning of each year
D.You lease physical servers from the cloud provider for a fixed monthly fee
Why B: Option B is correct because cloud computing follows an operational expenditure (OpEx) model where you pay only for the resources you actually consume, such as compute hours, storage GB-months, or data transfer, on a recurring basis. This eliminates the need for large upfront capital investments and allows you to scale costs with usage, aligning with the pay-as-you-go pricing model central to Azure and other cloud providers.
Variation 2. A cloud provider offers resources on-demand and measures usage. Customers pay only for what they consume. Which characteristic of cloud computing is this?
easy
✓ A.Measured service
B.Resource pooling
C.Broad network access
D.Rapid elasticity
Why A: This describes the 'measured service' characteristic, where cloud providers meter resource usage (e.g., compute hours, storage GB, network I/O) and bill customers based on actual consumption. This pay-per-use model is enabled by telemetry and monitoring systems that track metrics like CPU time, bandwidth, and API calls, allowing granular cost allocation.
Last reviewed: Jun 11, 2026
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