The answer is pay-as-you-go, also known as consumption-based pricing. This model is correct because it charges a company only for the specific resources they actually consume—such as virtual machine hours or storage gigabytes—with no upfront costs or fixed long-term commitments, directly matching the scenario of a monthly fee based on usage. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of how Azure aligns costs with actual consumption, often appearing in questions that contrast it with reserved or spot pricing. A common trap is confusing pay-as-you-go with a flat-rate subscription, but remember that pay-as-you-go is purely variable and usage-driven. For a quick memory tip, think “pay only for what you pour”—like a utility bill where you are charged for the exact amount of electricity or water used, not a fixed monthly fee.
AZ-900 Describe cloud concepts Practice Question
This AZ-900 practice question tests your understanding of describe cloud concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 pays a monthly subscription fee for cloud services based on the resources they consume, such as the number of virtual machines or amount of storage used. There are no upfront costs or fixed long-term commitments. This pricing model is known as:
Correct. Pay-as-you-go allows you to pay for resources as you use them, with no upfront payment or long-term commitment.
B
Reserved instances
Why wrong: Incorrect. Reserved instances require a one- or three-year commitment in exchange for a discount, not the flexibility described.
C
Spot pricing
Why wrong: Incorrect. Spot pricing uses Azure's unused capacity at a lower cost, but instances can be evicted, and it is not a standard monthly subscription model.
D
Hybrid benefit
Why wrong: Incorrect. Azure Hybrid Benefit allows you to use existing on-premises licenses to reduce costs, not a pricing model based on consumption.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Pay-as-you-go
Pay-as-you-go (also called consumption-based pricing) is the correct model because it charges the customer only for the actual resources consumed (e.g., VM hours, storage GBs) with no upfront payment or termination penalties. This aligns directly with the scenario of a monthly subscription fee based on resource usage without long-term commitments.
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.
✓
Pay-as-you-go
Why this is correct
Correct. Pay-as-you-go allows you to pay for resources as you use them, with no upfront payment or long-term commitment.
Related concept
Read the scenario before looking for a memorised answer.
✗
Reserved instances
Why it's wrong here
Incorrect. Reserved instances require a one- or three-year commitment in exchange for a discount, not the flexibility described.
✗
Spot pricing
Why it's wrong here
Incorrect. Spot pricing uses Azure's unused capacity at a lower cost, but instances can be evicted, and it is not a standard monthly subscription model.
✗
Hybrid benefit
Why it's wrong here
Incorrect. Azure Hybrid Benefit allows you to use existing on-premises licenses to reduce costs, not a pricing model based on consumption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'pay-as-you-go' with 'reserved instances' because both involve monthly payments, but reserved instances require a fixed-term commitment (1 or 3 years) and upfront payment options, which the question explicitly excludes.
Detailed technical explanation
How to think about this question
Under the hood, pay-as-you-go pricing in Azure is metered per resource at fine-grained intervals (e.g., per second for VMs, per GB for storage) and billed monthly. This model is ideal for variable workloads or startups because it avoids capital expenditure (CapEx) and shifts costs to operational expenditure (OpEx), but it can become more expensive than reserved instances for steady-state workloads over time.
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: Pay-as-you-go — Pay-as-you-go (also called consumption-based pricing) is the correct model because it charges the customer only for the actual resources consumed (e.g., VM hours, storage GBs) with no upfront payment or termination penalties. This aligns directly with the scenario of a monthly subscription fee based on resource usage without long-term commitments.
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 →
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. In cloud computing, what does 'consumption-based pricing' mean?
easy
A.Paying a fixed monthly fee regardless of actual resource usage
✓ B.Paying only for the resources you actually use, measured by time, amount, or transactions
C.Purchasing capacity upfront for a year at a discounted rate
D.Paying a per-user license fee for cloud software access
Why B: Consumption-based pricing is a cloud billing model where you pay only for the resources you consume, measured by metrics such as compute hours, storage GB-months, or number of transactions. This aligns with the operational expenditure (OpEx) model, allowing you to scale costs with usage without upfront commitments. Microsoft Azure implements this through pay-as-you-go pricing, where you are billed at the end of each billing cycle based on metered usage.
Last reviewed: Jun 11, 2026
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