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 business wants to use a cloud solution where they can scale computing resources up or down automatically based on demand and only pay for what they use. The cloud provider manages the underlying hardware. Which two cloud characteristics are being described? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Elasticity
Elasticity is correct because it describes the ability to automatically scale computing resources up or down based on demand, which is a key characteristic of cloud computing. The scenario explicitly states that resources scale automatically, which aligns with elasticity rather than just the ability to scale (scalability). Measured service is correct because the business pays only for what they use, which is the pay-per-use billing model enabled by metering resource consumption.
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.
✓
Elasticity
Why this is correct
Correct. Elasticity allows automatic scaling of resources to match demand, which is described in the scenario.
Related concept
Read the scenario before looking for a memorised answer.
✓
Measured service
Why this is correct
Correct. Measured service means customers pay only for what they use, as stated in the scenario.
Related concept
Read the scenario before looking for a memorised answer.
✗
Scalability
Why it's wrong here
Scalability is a broader concept that includes manual scaling; it doesn't specifically imply automatic scaling or pay-as-you-go.
✗
High availability
Why it's wrong here
High availability ensures services remain accessible, but it doesn't relate to scaling or usage-based billing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse scalability (the ability to scale) with elasticity (automatic scaling based on demand), and they overlook measured service as a distinct characteristic because they focus only on the scaling aspect rather than the pay-per-use billing model explicitly stated in the question.
Detailed technical explanation
How to think about this question
Elasticity in cloud computing is often implemented via auto-scaling groups that use metrics like CPU utilization or request count to trigger scale-out or scale-in actions, leveraging APIs such as AWS Auto Scaling or Azure Virtual Machine Scale Sets. Measured service relies on resource metering at a granular level (e.g., per-hour VM usage, per-GB storage, or per-API call) and is foundational to the cloud's pay-as-you-go model, often tracked via cloud provider billing APIs and usage reports. A real-world scenario is an e-commerce site that automatically spins up additional web servers during a flash sale and terminates them afterward, paying only for the extra compute time used.
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: Elasticity — Elasticity is correct because it describes the ability to automatically scale computing resources up or down based on demand, which is a key characteristic of cloud computing. The scenario explicitly states that resources scale automatically, which aligns with elasticity rather than just the ability to scale (scalability). Measured service is correct because the business pays only for what they use, which is the pay-per-use billing model enabled by metering resource consumption.
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.