- A
Measured service
This is correct because measured service is the characteristic where cloud providers meter usage and provide detailed reports, enabling customers to understand and optimize costs. The scenario of receiving a detailed per-hour and per-gigabyte bill directly illustrates this concept.
- B
On-demand self-service
Why wrong: This is incorrect. On-demand self-service refers to a consumer's ability to provision computing resources, such as launching an EC2 instance, without requiring human interaction with the service provider. The scenario focuses on billing granularity, not on the provisioning process.
- C
Broad network access
Why wrong: This is incorrect. Broad network access means that resources are accessible over the network through standard mechanisms (e.g., web browsers, APIs). The scenario does not involve how the resources are accessed but rather how usage is measured and billed.
- D
Resource pooling
Why wrong: This is incorrect. Resource pooling refers to the provider's computing resources being pooled to serve multiple consumers, with physical and virtual resources dynamically assigned. The scenario is about metering usage, not about the multi-tenant nature of the infrastructure.
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 Amazon EC2 instances and Amazon S3 for its workloads. The finance team reviews the monthly AWS bill and notices it includes line items for EC2 instance hours, data transfer out from EC2, and S3 storage usage. The bill shows exactly how many hours each instance ran and how much data was transferred. The company uses this detailed usage data to allocate costs to different departments and to optimize resource utilization. This scenario best demonstrates which essential characteristic of cloud computing?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 correct answer is A (Measured service) because the scenario explicitly describes how the company uses detailed usage data—EC2 instance hours, data transfer out, and S3 storage—to allocate costs and optimize resource utilization. This aligns with the cloud computing characteristic where resource usage is metered, monitored, and reported transparently, enabling pay-per-use billing and cost allocation.
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.
- ✓
Measured service
Why this is correct
This is correct because measured service is the characteristic where cloud providers meter usage and provide detailed reports, enabling customers to understand and optimize costs. The scenario of receiving a detailed per-hour and per-gigabyte bill directly illustrates this concept.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
On-demand self-service
Why it's wrong here
This is incorrect. On-demand self-service refers to a consumer's ability to provision computing resources, such as launching an EC2 instance, without requiring human interaction with the service provider. The scenario focuses on billing granularity, not on the provisioning process.
- ✗
Broad network access
Why it's wrong here
This is incorrect. Broad network access means that resources are accessible over the network through standard mechanisms (e.g., web browsers, APIs). The scenario does not involve how the resources are accessed but rather how usage is measured and billed.
- ✗
Resource pooling
Why it's wrong here
This is incorrect. Resource pooling refers to the provider's computing resources being pooled to serve multiple consumers, with physical and virtual resources dynamically assigned. The scenario is about metering usage, not about the multi-tenant nature of the infrastructure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'Measured service' with 'Resource pooling' because both involve resource usage, but measured service specifically refers to the metering and reporting of usage for billing and optimization, not the multi-tenant sharing aspect.
Trap categories for this question
Scenario analysis trap
This is incorrect. On-demand self-service refers to a consumer's ability to provision computing resources, such as launching an EC2 instance, without requiring human interaction with the service provider. The scenario focuses on billing granularity, not on the provisioning process.
Detailed technical explanation
How to think about this question
Measured service in AWS is implemented through services like AWS CloudTrail, Amazon CloudWatch, and the AWS Cost and Usage Report (CUR), which provide granular metering of resources such as EC2 instance hours (billed per second or per hour) and S3 storage (billed per GB-month). This metering enables chargeback models where departments are billed based on actual consumption, and it supports optimization by identifying underutilized instances or excessive data transfer costs.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Cloud Concepts — study guide chapter
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Concepts — This question tests 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 — The correct answer is A (Measured service) because the scenario explicitly describes how the company uses detailed usage data—EC2 instance hours, data transfer out, and S3 storage—to allocate costs and optimize resource utilization. This aligns with the cloud computing characteristic where resource usage is metered, monitored, and reported transparently, enabling pay-per-use billing and cost allocation.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services 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 CLF-C02 exam.
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