- A
On-demand self-service
Why wrong: This characteristic refers to the ability of a user to provision computing resources (e.g., virtual machines, databases) without requiring human interaction with the service provider. While the deployment of the database is an example of on-demand self-service, the billing model described (metered usage and invoicing) is not about provisioning; it is about usage tracking and payment.
- B
Broad network access
Why wrong: Broad network access means that resources are available over the network and can be accessed by standard client platforms (e.g., laptops, mobile devices). This characteristic does not relate to how billing is calculated or invoiced.
- C
Resource pooling
Why wrong: Resource pooling allows the cloud provider to serve multiple customers using a multi-tenant model, with physical and virtual resources dynamically assigned and reassigned according to consumer demand. While the Azure SQL Database runs on shared infrastructure, the billing mechanism based on exact usage is not a direct demonstration of resource pooling.
- D
Measured service
Measured service is the correct characteristic. Cloud systems meter resource usage (such as storage and DTUs) and provide usage reports. This enables a pay-per-use billing model, as described in the scenario where the company receives a detailed invoice based on exact consumption.
Quick Answer
The answer is measured service. This billing model demonstrates measured service because Azure SQL Database meters resource consumption—specifically data storage and transaction throughput measured in DTUs—and charges accordingly on a pay-per-use basis, with the end-of-month invoice providing full transparency into exactly what was used and what it cost. On the Microsoft Azure Fundamentals AZ-900 exam, this characteristic tests your understanding that cloud providers monitor, control, and report usage for both the provider and consumer, often appearing in scenarios about resource metering or billing transparency. A common trap is confusing measured service with rapid elasticity, but remember: measured service is about usage tracking and billing, not scaling. For a quick memory tip, think “metered money”—if the cloud provider is tracking how much you use and billing you for that exact amount, it’s measured service.
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 deploys an Azure SQL Database. The company is billed based on the amount of data stored and the number of transactions per second (DTUs). At the end of each month, the company receives an invoice that itemizes the exact usage and the corresponding charges. Which of the five essential characteristics of cloud computing does this billing model primarily demonstrate?
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 billing model for Azure SQL Database, which itemizes usage based on data stored and transactions per second (DTUs), directly demonstrates the 'Measured service' characteristic. This is because cloud providers meter and charge for resource consumption (storage and DTUs) with pay-per-use billing, providing transparency for both the provider and consumer. The detailed invoice showing exact usage and charges is the hallmark of measured service, where usage is monitored, controlled, and reported.
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
This characteristic refers to the ability of a user to provision computing resources (e.g., virtual machines, databases) without requiring human interaction with the service provider. While the deployment of the database is an example of on-demand self-service, the billing model described (metered usage and invoicing) is not about provisioning; it is about usage tracking and payment.
- ✗
Broad network access
Why it's wrong here
Broad network access means that resources are available over the network and can be accessed by standard client platforms (e.g., laptops, mobile devices). This characteristic does not relate to how billing is calculated or invoiced.
- ✗
Resource pooling
Why it's wrong here
Resource pooling allows the cloud provider to serve multiple customers using a multi-tenant model, with physical and virtual resources dynamically assigned and reassigned according to consumer demand. While the Azure SQL Database runs on shared infrastructure, the billing mechanism based on exact usage is not a direct demonstration of resource pooling.
- ✓
Measured service
Why this is correct
Measured service is the correct characteristic. Cloud systems meter resource usage (such as storage and DTUs) and provide usage reports. This enables a pay-per-use billing model, as described in the scenario where the company receives a detailed invoice based on exact consumption.
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 often confuse 'measured service' with 'on-demand self-service' because both involve user interaction with the cloud, but measured service specifically focuses on the metering, monitoring, and billing of resource usage, not the ability to provision resources without human intervention.
Detailed technical explanation
How to think about this question
Under the hood, Azure SQL Database's DTU model is a blended measure of compute, storage, and I/O resources, where each DTU represents a normalized unit of these combined resources. The measured service characteristic is enforced through Azure's Resource Provider and billing APIs that track DTU consumption and storage usage at the database level, generating detailed usage records (e.g., in the Azure Cost Management + Billing portal) that are aggregated into monthly invoices. In a real-world scenario, if a company scales its DTU tier from S2 to S3 mid-month, the invoice will prorate charges based on the exact hours each tier was active, demonstrating granular metering.
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
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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 billing model for Azure SQL Database, which itemizes usage based on data stored and transactions per second (DTUs), directly demonstrates the 'Measured service' characteristic. This is because cloud providers meter and charge for resource consumption (storage and DTUs) with pay-per-use billing, providing transparency for both the provider and consumer. The detailed invoice showing exact usage and charges is the hallmark of measured service, where usage is monitored, controlled, and reported.
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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Last reviewed: Jun 11, 2026
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.
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