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.
What is the key difference between capital expenditure (CapEx) and operational expenditure (OpEx) in the context of cloud computing?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CapEx is upfront investment in owned infrastructure; OpEx is ongoing pay-as-you-go service costs
Option B is correct because capital expenditure (CapEx) involves a large upfront investment to purchase and own physical infrastructure (servers, storage, networking), while operational expenditure (OpEx) represents ongoing, consumption-based costs where you pay only for the resources you use (e.g., per-hour VM billing, per-GB storage fees). In cloud computing, the shift from CapEx to OpEx is a fundamental financial model change, enabling organizations to avoid large capital outlays and instead align costs with actual usage.
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.
✗
CapEx is for cloud spending; OpEx is for on-premises spending
Why it's wrong here
This is reversed — cloud is typically OpEx; on-premises is typically CapEx.
✓
CapEx is upfront investment in owned infrastructure; OpEx is ongoing pay-as-you-go service costs
This reversal is incorrect — CapEx covers hardware; OpEx covers operational service costs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the financial classification with the deployment location, thinking CapEx is only for on-premises and OpEx only for cloud, when in reality both models can exist in either environment depending on the purchasing commitment (e.g., reserved instances are CapEx-like even in cloud).
Detailed technical explanation
How to think about this question
Under the hood, CapEx in cloud can manifest as reserved instances (e.g., AWS Reserved Instances or Azure Reserved VM Instances) where you pay upfront for a 1- or 3-year term to get a discounted hourly rate, effectively converting OpEx into a CapEx-like model. Conversely, OpEx aligns with the cloud's pay-as-you-go pricing, where billing is based on metered usage (e.g., per-second compute, per-GB data transfer) and no asset is capitalized on the balance sheet. A real-world scenario: a company migrating from on-premises data centers (CapEx-heavy) to Azure (OpEx-heavy) can reallocate capital to innovation instead of hardware refresh cycles.
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: CapEx is upfront investment in owned infrastructure; OpEx is ongoing pay-as-you-go service costs — Option B is correct because capital expenditure (CapEx) involves a large upfront investment to purchase and own physical infrastructure (servers, storage, networking), while operational expenditure (OpEx) represents ongoing, consumption-based costs where you pay only for the resources you use (e.g., per-hour VM billing, per-GB storage fees). In cloud computing, the shift from CapEx to OpEx is a fundamental financial model change, enabling organizations to avoid large capital outlays and instead align costs with actual usage.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.