Question 884 of 1,031

Describe cloud concepts →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is consumption-based pricing, which is the correct choice because it directly aligns with the startup’s need to pay only for the compute and storage resources it actually uses, with per-hour or per-minute billing and no upfront capital. This cloud computing benefit eliminates large initial investments and ties costs directly to actual usage, making it ideal for unpredictable demand scenarios where scaling up or down is frequent. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of how cloud economics differ from traditional on-premises models, often appearing in scenario-based questions that contrast consumption-based pricing with fixed, upfront capital expenditure. A common trap is confusing this with economies of scale, which focuses on cost reductions from massive provider infrastructure rather than usage-based billing. Remember the memory tip: “Pay as you go, not pay as you grow” — consumption pricing means you only pay for what you consume, like a utility bill, not a fixed subscription.

AZ-900 Describe cloud concepts Practice Question

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 startup company plans to move its e-commerce application to Azure. The startup has limited upfront capital and expects demand to be unpredictable initially. The key requirement is that the company should only be charged for the compute and storage resources it actually uses, with the ability to pay per hour or per minute. This requirement directly maps to which fundamental benefit of cloud computing?

Question 1easymultiple choice

Full question →

A
High availability – redundant infrastructure ensures the application stays online.
Why wrong: High availability focuses on minimizing downtime through redundancy, not on paying only for used resources. This option does not address the cost model requirement.
B
Elasticity – resources can automatically scale out and in based on demand.
Why wrong: Elasticity is the ability to dynamically adjust resources to match workload changes. While related to cost efficiency, it does not directly describe the billing model of paying only for consumed resources.
C
Consumption-based pricing – customers pay only for the resources they consume, with no upfront costs.
Consumption-based pricing (pay-as-you-go) allows the startup to avoid capital expenditure and pay per hour or per minute for actual usage. This directly matches the requirement of charging only for resources used.
D
Disaster recovery – data and applications are backed up to another region.
Why wrong: Disaster recovery provides business continuity after a failure, but it is not related to the billing model or cost structure described in the requirement.

Full breakdown with real-world context →

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

✓

Consumption-based pricing – customers pay only for the resources they consume, with no upfront costs.

Option C is correct because the startup's requirement to pay only for the compute and storage resources it actually uses, with per-hour or per-minute billing and no upfront capital, directly maps to consumption-based pricing. This cloud benefit eliminates the need for large initial investments and aligns costs with actual usage, which is ideal for unpredictable demand scenarios.

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.

✗
High availability – redundant infrastructure ensures the application stays online.
Why it's wrong here
High availability focuses on minimizing downtime through redundancy, not on paying only for used resources. This option does not address the cost model requirement.
✗
Elasticity – resources can automatically scale out and in based on demand.
Why it's wrong here
Elasticity is the ability to dynamically adjust resources to match workload changes. While related to cost efficiency, it does not directly describe the billing model of paying only for consumed resources.
✓
Consumption-based pricing – customers pay only for the resources they consume, with no upfront costs.
Why this is correct
Consumption-based pricing (pay-as-you-go) allows the startup to avoid capital expenditure and pay per hour or per minute for actual usage. This directly matches the requirement of charging only for resources used.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disaster recovery – data and applications are backed up to another region.
Why it's wrong here
Disaster recovery provides business continuity after a failure, but it is not related to the billing model or cost structure described in the requirement.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse elasticity (the ability to scale resources) with consumption-based pricing (the billing model), but elasticity addresses dynamic resource adjustment, not the financial aspect of paying only for what you use.

Detailed technical explanation

How to think about this question

Consumption-based pricing in Azure is implemented through a metered billing system where resources like virtual machines, storage, and network bandwidth are tracked per minute or per hour via Azure Metering APIs. This model relies on Azure Resource Manager to log resource usage and generate detailed usage records, which are then processed by the Azure billing system to produce invoices. For example, an Azure VM running for 30 minutes would only incur charges for that exact duration, with no minimum commitment, enabling startups to avoid capital expenditure (CapEx) and shift to operational expenditure (OpEx).

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.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this AZ-900 question test?

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 – customers pay only for the resources they consume, with no upfront costs. — Option C is correct because the startup's requirement to pay only for the compute and storage resources it actually uses, with per-hour or per-minute billing and no upfront capital, directly maps to consumption-based pricing. This cloud benefit eliminates the need for large initial investments and aligns costs with actual usage, which is ideal for unpredictable demand scenarios.

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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