This MS-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 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?
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.
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.
✗
Rapid elasticity
Why it's wrong here
Rapid elasticity refers to the ability to quickly scale resources up or down, not the billing model.
✗
Resource pooling
Why it's wrong here
Resource pooling means multiple customers share the same physical infrastructure, but billing is not directly defined.
✗
On-demand self-service
Why it's wrong here
On-demand self-service allows users to provision resources without human intervention, but does not describe the billing model.
✓
Measured service
Why this is correct
Measured service enables the provider to track usage and bill customers based on 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 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.
Detailed technical explanation
How to think about this question
Under the hood, measured service relies on resource meters (e.g., Azure Metering Service) that track metrics like CPU time, network I/O, and storage IOPS at the hypervisor or API level, often using standards like the Cloud Auditing Data Federation (CADF) for audit trails. A subtle behavior is that even 'free' tiers or reserved instances still involve metering—reserved instances simply apply a discounted rate to the metered usage, not a waiver of metering. In a real-world scenario, a company using Azure Spot VMs pays only for compute hours when preemptible capacity is available, with no charge for the time the VM is deallocated, which is a direct application of measured service.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
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 — 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.
What should I do if I get this MS-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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.