MS-900 Describe cloud concepts Practice Question
A company uses cloud resources and notices that their monthly bill is based on the exact amount of storage and compute hours they consumed. They did not pay for any fixed, unused capacity. Which cloud characteristic does this describe?
⚠ Common exam trap
Candidates often confuse 'measured service' with 'on-demand self-service' because both involve user-driven provisioning, but measured service specifically addresses the metering and billing aspect, not the provisioning mechanism.
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
Measured service is the cloud characteristic that enables usage-based billing, where customers pay only for the resources they actually consume (e.g., storage GB-hours, compute vCPU-hours) without any upfront or fixed costs for idle capacity. This is implemented through metering capabilities at the hypervisor or resource provider level, which track consumption in granular units and feed into billing systems. The scenario explicitly describes paying for exact consumption, which aligns directly with the pay-per-use model of measured service.
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 is a cloud characteristic that allows resources to be scaled out or in quickly, often automatically, to match demand fluctuations. This is a functional capability focused on performance and agility, not on how costs are calculated or invoiced. The billing mechanism in cloud computing is instead driven by measured service, which tracks resource consumption and generates monthly charges accordingly.
- ✗
Resource pooling
Why it's wrong here
Resource pooling describes a multi-tenant model where the provider's physical and virtual resources are shared across multiple customers, dynamically assigned based on demand. This component is about infrastructure efficiency and cost amortization, but it does not define how an individual customer is billed for their specific usage. A customer could be billed a flat fee, a subscription, or by usage volume, so resource pooling alone is not the billing model.
- ✗
On-demand self-service
Why it's wrong here
On-demand self-service enables a customer to provision or deprovision computing resources, such as virtual machines or storage, automatically without requiring human interaction with the provider's staff. This characteristic supports convenience, speed, and automation, but it is a service delivery feature rather than a financial or metering model. The monthly bill described in the scenario is a result of measured service, which quantifies the actual resources consumed, not of this self-service capability.
- ✓
Measured service
Why this is correct
Measured service is the cloud characteristic that monitors, controls, reports, and bills customers based on their actual resource consumption, such as processing time, storage, or bandwidth. This metering capability enables pay-as-you-go pricing, where the monthly invoice directly reflects the quantity and type of cloud resources used. It provides transparency and allows customers to align costs with usage, which is precisely the scenario of a monthly bill based on consumption.
Go deeper
Related to this question
About these practice questions
Courseiva writes every MS-900 question from scratch — 217 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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 MS-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 MS-900 exam.