Measured Service in Azure: Pay Only for What You Use
A retail company migrates its e-commerce platform to Azure Virtual Machines. The workload is seasonal, with high traffic during holiday sales and low traffic otherwise. To manage costs, the IT team configures Azure Automation to power off VMs during low-traffic periods and power them back on when demand increases. The company's monthly bill reflects charges only for the hours each VM was actually running; no charges are incurred for the time the VMs were in the 'Stopped (deallocated)' state. This consumption-based billing model is a direct example of which fundamental characteristic of cloud computing?
Quick Answer
The answer is measured service, the cloud characteristic that meters resource usage and bills based on actual consumption. In the scenario, the retail company only pays for the compute hours its Azure VMs are actively running, with no charges incurred during the Stopped (deallocated) state, directly demonstrating how measured service enables pay-as-you-go pricing. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of how cloud providers track and bill for resources like virtual machine uptime, storage, or data transfer, often appearing in scenarios involving cost optimization or automation. A common trap is confusing measured service with on-demand self-service, but remember: measured service is about the metering and billing of usage, not the ability to provision resources without human interaction. To lock it in, think of a utility bill—you pay for the kilowatt-hours you actually use, not for the capacity sitting idle.
⚠ Common exam trap
Test-takers frequently confuse 'measured service' with 'rapid elasticity' because both involve dynamic behavior, but measured service is about metering and billing, while rapid elasticity is about scaling resources automatically to match demand.
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 consumption-based billing model where charges are incurred only for the hours each VM is actually running, and no charges apply when VMs are in the 'Stopped (deallocated)' state. This directly exemplifies the 'measured service' characteristic of cloud computing, where resource usage (e.g., compute hours) is metered and billed based on actual consumption, enabling pay-as-you-go pricing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Rapid elasticity
Why it's wrong here
Rapid elasticity refers to the ability to quickly scale resources up or down, often automatically, to meet demand. The scenario describes a billing model based on actual consumption, not the speed of scaling.
When this WOULD be correct
A question describing an e-commerce site that automatically adds VMs during flash sales and removes them afterward, emphasizing the speed of provisioning and deprovisioning to handle traffic spikes.
- ✗
Resource pooling
Why it's wrong here
Resource pooling means the provider's computing resources are shared across multiple customers, with resources dynamically assigned as needed. The scenario focuses on pay-per-use billing, not multi-tenancy or resource sharing.
- ✓
Measured service
Why this is correct
Measured service is correct because cloud providers meter resource usage (e.g., VM compute hours) and bill customers accordingly. The company pays only for the hours VMs are running, which is the essence of consumption-based billing.
- ✗
Broad network access
Why it's wrong here
Broad network access means cloud resources are accessible over the internet via standard protocols (e.g., HTTPS, RDP) from a variety of devices. The scenario does not describe network accessibility; it describes a billing model.
When this WOULD be correct
A question describing how a company's employees can access cloud resources from anywhere using laptops, smartphones, and tablets via the internet, with no mention of billing or scaling, would make broad network access the correct answer.
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 correct because cloud providers meter resource usage (e.g., VM compute hours) and bill customers accordingly. The company pays only for the hours VMs are running, which is the essence of consumption-based billing.
✗Rapid elasticityWrong answer — click to see why▾
Why this is wrong here
Rapid elasticity refers to the ability to quickly scale resources up or down based on demand, but the question focuses on paying only for consumed resources (metered billing), not on the speed of scaling.
★ When this WOULD be the correct answer
A question describing an e-commerce site that automatically adds VMs during flash sales and removes them afterward, emphasizing the speed of provisioning and deprovisioning to handle traffic spikes.
Why candidates choose this
Candidates may confuse the automatic power-on/off behavior (which enables elasticity) with the billing model itself, mistakenly thinking the scenario illustrates rapid elasticity rather than measured service.
✗Broad network accessWrong answer — click to see why▾
Why this is wrong here
Broad network access refers to the ability to access cloud services over the network via standard protocols from various devices, not to billing based on actual usage. The scenario focuses on consumption-based billing, which is measured service.
★ When this WOULD be the correct answer
A question describing how a company's employees can access cloud resources from anywhere using laptops, smartphones, and tablets via the internet, with no mention of billing or scaling, would make broad network access the correct answer.
Why candidates choose this
Candidates may confuse 'broad network access' with the idea that VMs are accessible when powered on, but the key point is the billing model, not network accessibility.
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
Azure Automation
Azure Automation is a cloud-based service that lets you automatically create, deploy, monitor, and maintain resources in your Microsoft Azure environment using runbooks and configuration management.
Key term
Workload
A workload is any discrete application, service, or function that runs on a computing resource, consuming CPU, memory, storage, or network capacity.
About these practice questions
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Same concept, more angles
1 more way this is tested on AZ-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses Azure to host its virtual machines and storage. The company receives a monthly invoice that charges based on the exact number of virtual machine hours and gigabytes of storage consumed. No upfront payment is required. Which characteristic of cloud computing does this billing model represent?
easy- A.Rapid elasticity
- B.Resource pooling
- ✓ C.Measured service
- D.On-demand self-service
Why C: The billing model charges based on exact virtual machine hours and gigabytes of storage consumed, with no upfront payment. This directly reflects the measured service characteristic of cloud computing, where resource usage is metered, monitored, and billed according to consumption. Azure tracks usage metrics (e.g., VM runtime in hours, storage in GB-months) via its meters and generates invoices based on these precise measurements.
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.