This MS-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: opEx involves paying for services as they are consumed.. 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.
While preparing a Microsoft 365 adoption plan, a consultant is asked to avoid buying servers upfront and pay monthly based on usage. Cloud concept or benefit best matches this requirement?
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
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Operational expenditure (OpEx) model
The operational expenditure (OpEx) model is correct because it aligns with the requirement to avoid upfront capital investment (CapEx) and instead pay monthly based on usage. In Microsoft 365, this is delivered through subscription-based licensing (e.g., per-user per-month plans), which shifts costs from large upfront server purchases to predictable monthly payments that scale with consumption.
Key principle: OpEx involves paying for services as they are consumed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Sensitivity labels
Why it's wrong here
Sensitivity labels classify and protect content, not this cloud concept.
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Data Loss Prevention (DLP)
Why it's wrong here
DLP protects sensitive information from inappropriate sharing, not this cloud concept.
✓
Operational expenditure (OpEx) model
Why this is correct
Cloud services commonly shift spending from upfront capital purchases to ongoing operational spending based on consumption.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
OpEx involves paying for services as they are consumed.
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Microsoft Planner
Why it's wrong here
Planner manages tasks and does not describe this cloud model or benefit.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'operational expenditure' with a specific tool or feature (like Planner or DLP) because they focus on the word 'plan' in the question, rather than recognizing that OpEx is a fundamental cloud financial model distinct from any product or security feature.
Detailed technical explanation
How to think about this question
Under the OpEx model, Microsoft 365 subscriptions are billed via the Microsoft Customer Agreement (MCA) or Enterprise Agreement (EA), with monthly or annual payment cycles and no upfront hardware costs. This model leverages Microsoft's shared responsibility framework where Microsoft manages the physical infrastructure (servers, networking, storage) in its global datacenters, and the customer pays only for the licenses consumed, which can be adjusted up or down based on user counts. A real-world scenario is a startup that scales from 10 to 500 users without ever purchasing a server, relying on Microsoft 365's multi-tenant architecture and Azure Active Directory for identity management.
KKey Concepts to Remember
OpEx involves paying for services as they are consumed.
Cloud services typically operate on an OpEx model.
Avoids large upfront capital investments in infrastructure.
Costs scale directly with usage and demand.
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
OpEx involves paying for services as they are consumed.
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 MS-900 question in full detail.
Describe cloud concepts — This question tests Describe cloud concepts — OpEx involves paying for services as they are consumed..
What is the correct answer to this question?
The correct answer is: Operational expenditure (OpEx) model — The operational expenditure (OpEx) model is correct because it aligns with the requirement to avoid upfront capital investment (CapEx) and instead pay monthly based on usage. In Microsoft 365, this is delivered through subscription-based licensing (e.g., per-user per-month plans), which shifts costs from large upfront server purchases to predictable monthly payments that scale with consumption.
What should I do if I get this MS-900 question wrong?
Review opEx involves paying for services as they are consumed., then practise related MS-900 questions on the same topic to reinforce the concept.
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?
OpEx involves paying for services as they are consumed.
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