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.
A company wants to move their on-premises infrastructure to the cloud to avoid the large upfront cost of purchasing new servers every three years. In the cloud, they will pay only for the server capacity they use, with no long-term commitment. This shift from upfront investment to variable expense is an example of which cloud benefit?
Correct. Consumption-based pricing means you pay only for the resources you consume, avoiding large upfront capital expenses.
B
Economies of scale
Why wrong: Incorrect. Economies of scale refer to the cost savings that cloud providers achieve from operating at scale, which they can pass on to customers, but it is not the direct shift in expenditure model.
C
Capacity planning
Why wrong: Incorrect. Capacity planning is a process, not a benefit of cloud pricing.
D
Reserved capacity
Why wrong: Incorrect. Reserved capacity involves a long-term commitment and still requires upfront or periodic payment, not a pure variable expense.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Consumption-based pricing
Consumption-based pricing is a cloud model where customers pay only for the resources they actually use (e.g., compute hours, storage GBs) with no upfront costs or long-term commitments. This directly matches the scenario of avoiding large upfront server purchases and paying only for capacity used, shifting from a capital expenditure (CapEx) to an operational expenditure (OpEx) model.
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.
✓
Consumption-based pricing
Why this is correct
Correct. Consumption-based pricing means you pay only for the resources you consume, avoiding large upfront capital expenses.
Related concept
Read the scenario before looking for a memorised answer.
✗
Economies of scale
Why it's wrong here
Incorrect. Economies of scale refer to the cost savings that cloud providers achieve from operating at scale, which they can pass on to customers, but it is not the direct shift in expenditure model.
✗
Capacity planning
Why it's wrong here
Incorrect. Capacity planning is a process, not a benefit of cloud pricing.
✗
Reserved capacity
Why it's wrong here
Incorrect. Reserved capacity involves a long-term commitment and still requires upfront or periodic payment, not a pure variable expense.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing 'consumption-based pricing' with 'reserved capacity' — candidates often think any cost-saving model involves a commitment, but the question explicitly states 'no long-term commitment,' making reserved capacity the wrong choice.
Detailed technical explanation
How to think about this question
Consumption-based pricing relies on metering at the hypervisor or API level (e.g., Azure Resource Manager tracks VM uptime in minutes, storage in GB-months). This enables granular billing per resource, such as $0.08 per hour for a B2s VM, with no upfront payment. In real-world scenarios, this allows auto-scaling workloads to dynamically increase or decrease costs in real time, directly aligning expenses with actual usage patterns.
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: Consumption-based pricing — Consumption-based pricing is a cloud model where customers pay only for the resources they actually use (e.g., compute hours, storage GBs) with no upfront costs or long-term commitments. This directly matches the scenario of avoiding large upfront server purchases and paying only for capacity used, shifting from a capital expenditure (CapEx) to an operational expenditure (OpEx) model.
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.
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Question Discussion
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