AZ-900 Describe cloud concepts Practice Question
Which statement accurately describes the consumption-based pricing model in cloud computing?
⚠ Common exam trap
Test-takers frequently confuse consumption-based pricing with a flat-rate or subscription model, mistakenly thinking that 'pay-as-you-go' means a fixed monthly fee, when in reality it is variable and directly tied to actual resource usage.
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
✓
You pay only for the resources you actually use
The consumption-based pricing model, also known as pay-as-you-go, is a core financial model in cloud computing where you are billed only for the specific resources you consume (e.g., compute hours, storage GB, data transfer). This model eliminates upfront capital expenditure and allows costs to scale dynamically with usage, directly aligning expenses with actual consumption rather than capacity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
You pay a flat monthly fee regardless of how much you use
Why it's wrong here
A flat monthly fee regardless of usage is a subscription-based pricing model, not consumption-based pricing. Under Azure's standard pay-as-you-go model, your bill reflects the actual runtime hours, storage capacity, network bandwidth, and transactions you consumed during the billing cycle. Even low-usage months produce proportionate, not flat, charges, and there is no all-you-can-use entitlement.
- ✓
You pay only for the resources you actually use
Why this is correct
This is the correct definition: consumption-based pricing meters each Azure resource—virtual machines, storage, outbound data transfers, API calls—and bills you only for the metered quantity actually used. The model has no upfront capital expense and no idle-cost penalty; deleting or deallocating resources immediately stops the meter. You can scale usage up or down within minutes and your monthly invoice changes accordingly.
- ✗
You must commit to a one-year contract
Why it's wrong here
One-year or three-year commitments are optional discount mechanisms, not a requirement of the consumption-based model. The default Azure pay-as-you-go plan lets you provision and release resources at any time without termination fees or term contracts. Commitments appear only when you knowingly purchase Azure Reservations or savings plans to trade flexibility for reduced per-unit rates.
- ✗
Cloud resources are always free during off-peak hours
Why it's wrong here
Off-peak hours do not make Azure resources free; the meter runs for every active resource regardless of clock time. A VM you leave running at 2 A.M. accrues the same per-second rate as during business hours. While some transient workloads—like spot virtual machines with preemptible capacity—can have lower dynamic prices, this is a capacity-pricing strategy, not a time-of-day discount, and never results in zero charges.
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Related to this question
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What is Cloud Computing?
Key term
Cloud computing
Cloud computing is the on-demand delivery of IT resources over the internet, allowing users to access computing power, storage, and applications without owning physical hardware.
Key term
Consumption-based pricing
Consumption-based pricing is a cloud billing model where you pay only for the resources you actually use, rather than paying a fixed upfront fee.
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