Pay-as-You-Go Pricing Model
A company wants to pay only for the compute resources they actually use, with no upfront costs. They can scale up or down based on demand. Which cloud pricing model does this describe?
Quick Answer
The correct answer is B) Pay-as-you-go, because this cloud pricing model is specifically designed to align costs directly with actual consumption, requiring no upfront payments or long-term commitments. Technically, pay-as-you-go operates on a consumption-based model where you are billed only for the compute resources you use, such as virtual machine hours or storage, and you can freely scale resources up or down in real time to match demand. On the Microsoft Azure Fundamentals AZ-900 exam, this question tests your understanding of core pricing concepts, often contrasting pay-as-you-go with reserved instances or spot pricing; a common trap is confusing it with a free tier or flat-rate plan. Remember that pay-as-you-go is the default, flexible option for variable workloads, while reserved instances offer discounts for commitment. A helpful memory tip: think of it like a utility bill—you pay for exactly what you use, no more, no less.
⚠ Common exam trap
Microsoft often tests the distinction between pay-as-you-go and reserved capacity, where candidates mistakenly think reserved capacity also allows scaling without upfront costs, but reserved capacity requires a commitment and does not offer the same on-demand flexibility.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
B) Pay-as-you-go
The pay-as-you-go model (also called consumption-based pricing) allows a company to pay only for the compute resources they actually consume, with no upfront costs or long-term commitments. This model provides the flexibility to scale resources up or down based on real-time demand, aligning costs directly with usage. It is the standard pricing model for most cloud services, including Azure virtual machines and App Service plans, when no reservation or spot discount is applied.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A) Reserved capacity
Why it's wrong here
Reserved capacity requires a one- or three-year commitment for a discount, not pay-per-use without upfront costs.
When this WOULD be correct
A question that asks for a model offering significant discounts in exchange for a long-term commitment (e.g., 'Which pricing model provides the lowest cost for predictable, steady-state workloads?').
- ✓
B) Pay-as-you-go
Why this is correct
Pay-as-you-go charges based on actual usage with no upfront payment, offering flexibility to scale.
- ✗
C) Spot pricing
Why it's wrong here
Spot pricing offers discounted capacity but instances can be evicted; not a guaranteed per-usage model.
When this WOULD be correct
A company needs to run fault-tolerant batch processing jobs at the lowest possible cost and can handle interruptions. Which pricing model should they use?
- ✗
D) Hybrid benefit
Why it's wrong here
Hybrid benefit reduces cost by using on-premises licenses, not a pricing model for pay-per-use.
When this WOULD be correct
A company has existing Windows Server or SQL Server licenses with Software Assurance and wants to use them in Azure to save on licensing costs. The question would ask: 'Which Azure benefit allows you to use your on-premises licenses in the cloud to reduce costs?'
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓B) Pay-as-you-goCorrect answer▾
Why this is correct
Pay-as-you-go charges based on actual usage with no upfront payment, offering flexibility to scale.
✗A) Reserved capacityWrong answer — click to see why▾
Why this is wrong here
Reserved capacity requires a 1- or 3-year commitment with upfront payment, not paying only for actual usage with no upfront costs.
★ When this WOULD be the correct answer
A question that asks for a model offering significant discounts in exchange for a long-term commitment (e.g., 'Which pricing model provides the lowest cost for predictable, steady-state workloads?').
Why candidates choose this
Candidates may confuse 'reserved' with 'pay only for what you use' because reserved instances still charge per hour, but they miss the upfront commitment requirement.
✗C) Spot pricingWrong answer — click to see why▾
Why this is wrong here
Spot pricing is for unused capacity at a discount but can be interrupted; it does not guarantee the ability to scale up/down on demand without upfront costs like pay-as-you-go.
★ When this WOULD be the correct answer
A company needs to run fault-tolerant batch processing jobs at the lowest possible cost and can handle interruptions. Which pricing model should they use?
Why candidates choose this
Candidates may confuse 'pay only for what you use' with spot pricing, not realizing spot instances can be terminated when capacity is reclaimed.
✗D) Hybrid benefitWrong answer — click to see why▾
Why this is wrong here
Hybrid benefit refers to using existing on-premises licenses with Azure to reduce costs, not to paying only for compute resources used with no upfront costs.
★ When this WOULD be the correct answer
A company has existing Windows Server or SQL Server licenses with Software Assurance and wants to use them in Azure to save on licensing costs. The question would ask: 'Which Azure benefit allows you to use your on-premises licenses in the cloud to reduce costs?'
Why candidates choose this
Candidates may confuse 'hybrid' with a flexible pricing model that combines different payment options, or they may think 'benefit' implies cost savings similar to pay-as-you-go.
Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Same concept, more angles
1 more way this is tested on AZ-900
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 of the following is a key advantage of the public cloud model for a startup company with limited capital?
medium- A.Complete control over all hardware configurations
- ✓ B.No upfront capital investment — pay only for resources used
- C.Guaranteed highest possible performance at all times
- D.Exclusive use of physical hardware not shared with others
Why B: For a startup with limited capital, the public cloud model eliminates the need for large upfront hardware purchases. Instead, it uses a consumption-based pricing model where you pay only for the compute, storage, and network resources you actually use, typically billed per second or per hour. This operational expenditure (OpEx) model directly addresses the capital expenditure (CapEx) constraints of a new company.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.