AZ-900 Describe cloud concepts Practice Question
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?
⚠ Common exam trap
A common mix-up: candidates 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.
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.
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.
When this WOULD be correct
A question that asks: 'A company can provision an Azure SQL Database through the Azure portal without contacting support. Which cloud characteristic does this demonstrate?' would make on-demand self-service correct, as it highlights automatic provisioning.
- ✗
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.
When this WOULD be correct
A question that asks: 'A company uses a web application hosted on Azure that can be accessed from anywhere using a web browser on any device (laptop, tablet, smartphone). Which cloud characteristic does this describe?' would make Broad network access correct.
- ✗
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.
When this WOULD be correct
A question asks: 'A cloud provider hosts multiple customers' databases on the same physical server, automatically allocating resources based on demand. Which characteristic does this describe?' The correct answer would be 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.
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.
✓Measured serviceCorrect answer▾
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.
✗On-demand self-serviceWrong answer — click to see why▾
Why this is wrong here
The billing model described (usage-based charges for storage and DTUs) directly reflects the 'measured service' characteristic, where resource usage is monitored, controlled, and reported. 'On-demand self-service' refers to the ability to provision resources automatically without human interaction, not to billing granularity.
★ When this WOULD be the correct answer
A question that asks: 'A company can provision an Azure SQL Database through the Azure portal without contacting support. Which cloud characteristic does this demonstrate?' would make on-demand self-service correct, as it highlights automatic provisioning.
Why candidates choose this
Candidates may confuse 'on-demand self-service' with any automated or usage-based aspect of cloud services, mistakenly thinking that the ability to scale or pay per use implies self-service, rather than recognizing that measured service specifically addresses metering and billing.
✗Broad network accessWrong answer — click to see why▾
Why this is wrong here
Broad network access refers to the ability to access cloud resources over the network via standard protocols (e.g., HTTP, HTTPS). The billing model based on data storage and DTUs does not demonstrate network access capabilities; it demonstrates usage monitoring and billing, which is measured service.
★ When this WOULD be the correct answer
A question that asks: 'A company uses a web application hosted on Azure that can be accessed from anywhere using a web browser on any device (laptop, tablet, smartphone). Which cloud characteristic does this describe?' would make Broad network access correct.
Why candidates choose this
Candidates may confuse the fact that Azure SQL Database is accessed over a network (broad network access) with the billing model, mistakenly thinking that network-based access implies the billing model is about network access.
✗Resource poolingWrong answer — click to see why▾
Why this is wrong here
Resource pooling refers to the provider's computing resources being pooled to serve multiple customers, with physical and virtual resources dynamically assigned. The billing model based on usage (data stored and DTUs) directly demonstrates measured service, not resource pooling.
★ When this WOULD be the correct answer
A question asks: 'A cloud provider hosts multiple customers' databases on the same physical server, automatically allocating resources based on demand. Which characteristic does this describe?' The correct answer would be resource pooling.
Why candidates choose this
Candidates may confuse resource pooling with measured service because both involve multi-tenant environments and usage-based allocation, but resource pooling focuses on the sharing of infrastructure, not the metering and billing of usage.
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?”
Go deeper
Related to this question
Learn chapter
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
Azure SQL Database
Azure SQL Database is a fully managed relational database-as-a-service (DBaaS) in Microsoft Azure, based on the SQL Server engine, that handles scaling, backups, patching, and high availability automatically.
About these practice questions
This AZ-900 question is part of Courseiva's 981-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.