- A
Resource pooling
Why wrong: Resource pooling means the cloud provider serves multiple customers from the same physical infrastructure, with customer isolation. While AWS does pool resources, the scenario's focus is on metering and billing based on actual usage, not on multi-tenancy.
- B
Measured service
Correct. Measured service is the characteristic where cloud resources are metered, and customers pay only for what they use. The automatic tracking of instance-hours and pay-per-use billing perfectly illustrate this concept.
- C
Rapid elasticity
Why wrong: Rapid elasticity refers to the ability to scale resources up or down automatically in response to demand. In this scenario, the batch job uses a fixed set of instances and does not involve automatic scaling.
- D
Broad network access
Why wrong: Broad network access means resources are accessible over the network through standard protocols. The scenario does not mention network accessibility or how the company interacts with the resources; it focuses on billing and metering.
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 runs a nightly batch processing job on AWS that takes exactly 2 hours to complete. The company uses a fixed set of Amazon EC2 instances for the job. AWS automatically tracks the number of instance-hours consumed each month and bills the company precisely for that usage. The company does not need to sign a long-term contract or pay for idle resources. Which essential characteristic of cloud computing does this scenario best illustrate?
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 scenario describes AWS automatically tracking and billing precisely for the number of instance-hours consumed each month, without requiring a long-term contract or payment for idle resources. This directly illustrates the 'measured service' characteristic, where cloud resource usage is metered, monitored, and reported transparently, enabling pay-as-you-go billing. The fixed 2-hour nightly job and exact billing per instance-hour confirm that usage is measured and charged accordingly.
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.
- ✗
Resource pooling
Why it's wrong here
Resource pooling means the cloud provider serves multiple customers from the same physical infrastructure, with customer isolation. While AWS does pool resources, the scenario's focus is on metering and billing based on actual usage, not on multi-tenancy.
- ✓
Measured service
Why this is correct
Correct. Measured service is the characteristic where cloud resources are metered, and customers pay only for what they use. The automatic tracking of instance-hours and pay-per-use billing perfectly illustrate 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.
- ✗
Rapid elasticity
Why it's wrong here
Rapid elasticity refers to the ability to scale resources up or down automatically in response to demand. In this scenario, the batch job uses a fixed set of instances and does not involve automatic scaling.
- ✗
Broad network access
Why it's wrong here
Broad network access means resources are accessible over the network through standard protocols. The scenario does not mention network accessibility or how the company interacts with the resources; it focuses on billing and metering.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'measured service' with 'rapid elasticity' because both involve usage-based billing, but measured service focuses on metering and charging for actual consumption, while rapid elasticity is about automatic scaling to match demand.
Trap categories for this question
Scenario analysis trap
Resource pooling means the cloud provider serves multiple customers from the same physical infrastructure, with customer isolation. While AWS does pool resources, the scenario's focus is on metering and billing based on actual usage, not on multi-tenancy.
Detailed technical explanation
How to think about this question
Measured service in AWS is implemented through detailed usage metering at the resource level, such as EC2 instance-hours (billed per second for many instance types), data transfer, and storage. AWS CloudTrail and billing reports provide granular visibility into consumption, enabling cost allocation and optimization. In a real-world scenario, a company running a fixed 2-hour nightly job would see consistent monthly charges based on the exact number of instance-hours, with no over-provisioning costs, reinforcing the pay-as-you-go model.
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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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 scenario describes AWS automatically tracking and billing precisely for the number of instance-hours consumed each month, without requiring a long-term contract or payment for idle resources. This directly illustrates the 'measured service' characteristic, where cloud resource usage is metered, monitored, and reported transparently, enabling pay-as-you-go billing. The fixed 2-hour nightly job and exact billing per instance-hour confirm that usage is measured and charged accordingly.
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.
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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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