Question 277 of 1,031

Describe cloud concepts →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is measured service, as this scenario directly demonstrates the cloud computing characteristic where resource usage is automatically monitored, controlled, and reported. The SaaS provider tracks each customer’s exact CPU hours, storage GB-months, and data transfer, then generates invoices based on that metered consumption—exactly what measured service means. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of how cloud providers enable pay-as-you-go billing and usage transparency through APIs and monitoring tools. A common trap is confusing measured service with elasticity or scalability; remember that measured service is specifically about metering and reporting usage, not about automatically adding resources. For a memory tip, think of a utility meter: just as your electricity bill reflects exact kilowatt-hours used, measured service in cloud computing tracks every resource consumed.

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 company provides a software-as-a-service (SaaS) application to multiple enterprise customers. Each customer's usage of compute and storage resources is tracked separately. At the end of each month, the company generates detailed invoices that reflect each customer's exact resource consumption, including CPU hours, storage GB-months, and data transfer. The cloud provider automatically measures all resource usage and makes the data available through an API. Which essential characteristic of cloud computing does this scenario primarily demonstrate?

Question 1mediummultiple choice

Full question →

A
On-demand self-service
Why wrong: On-demand self-service refers to a consumer's ability to provision resources automatically without requiring human interaction with the service provider. The question describes tracking and billing for usage, not the automated provisioning of resources.
B
Broad network access
Why wrong: Broad network access means resources are available over the network and accessed through standard protocols. While the SaaS app is accessed over the network, the scenario's focus is on metering and billing individual customer usage, not on network accessibility.
C
Resource pooling
Why wrong: Resource pooling is the provider's ability to serve multiple customers from shared physical resources. While multi-tenancy is involved, the primary point of the scenario is the metering of usage per customer, not the pooling of resources.
D
Measured service
Measured service is the cloud characteristic that enables usage tracking, control, and reporting. Cloud providers automatically measure resource consumption (CPU, storage, bandwidth) and expose that data for billing and optimization. The scenario directly illustrates this by describing per-customer usage tracking and invoice generation.

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

✓

Measured service

The scenario describes a SaaS provider that tracks each customer's exact resource consumption (CPU hours, storage GB-months, data transfer) and generates invoices based on that metered usage. This aligns directly with the 'measured service' characteristic of cloud computing, where resource usage is automatically monitored, controlled, and reported, providing transparency for both the provider and consumer. The cloud provider's API making usage data available is a key enabler of this metering and billing capability.

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.

✗
On-demand self-service
Why it's wrong here
On-demand self-service refers to a consumer's ability to provision resources automatically without requiring human interaction with the service provider. The question describes tracking and billing for usage, not the automated provisioning of resources.
✗
Broad network access
Why it's wrong here
Broad network access means resources are available over the network and accessed through standard protocols. While the SaaS app is accessed over the network, the scenario's focus is on metering and billing individual customer usage, not on network accessibility.
✗
Resource pooling
Why it's wrong here
Resource pooling is the provider's ability to serve multiple customers from shared physical resources. While multi-tenancy is involved, the primary point of the scenario is the metering of usage per customer, not the pooling of resources.
✓
Measured service
Why this is correct
Measured service is the cloud characteristic that enables usage tracking, control, and reporting. Cloud providers automatically measure resource consumption (CPU, storage, bandwidth) and expose that data for billing and optimization. The scenario directly illustrates this by describing per-customer usage tracking and invoice generation.
Related concept
Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse 'measured service' with 'resource pooling' because both involve multi-tenant environments, but measured service specifically focuses on the metering and billing of usage per tenant, not the underlying shared infrastructure.

Trap categories for this question

Scenario analysis trap
Broad network access means resources are available over the network and accessed through standard protocols. While the SaaS app is accessed over the network, the scenario's focus is on metering and billing individual customer usage, not on network accessibility.

Detailed technical explanation

How to think about this question

Under the hood, measured service relies on a metering telemetry pipeline that collects resource consumption metrics (e.g., CPU time via hypervisor counters, storage usage via block-level I/O tracking) and aggregates them into billing records, often using a pay-as-you-go model. In real-world SaaS platforms like Salesforce or Microsoft 365, this metering is exposed through APIs (e.g., Azure Consumption APIs or AWS Cost Explorer) that allow granular breakdowns down to individual API calls or storage operations. A subtle behavior is that measured service can also include 'burst' billing where short-term spikes are averaged over a billing period to avoid penalizing transient usage.

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: Measured service — The scenario describes a SaaS provider that tracks each customer's exact resource consumption (CPU hours, storage GB-months, data transfer) and generates invoices based on that metered usage. This aligns directly with the 'measured service' characteristic of cloud computing, where resource usage is automatically monitored, controlled, and reported, providing transparency for both the provider and consumer. The cloud provider's API making usage data available is a key enabler of this metering and billing capability.

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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