Question 316 of 988
CLF-C02 Cloud Concepts Practice Question
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?
⚠ Common exam trap
It's easy for candidates to 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.
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.
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.
When this WOULD be correct
A question describing a cloud provider dynamically assigning virtual machines from a shared pool to multiple customers, where customers have no control over the physical location of resources, would make resource pooling the correct answer.
- ✓
Measured service
Why this is correct
Measured service is the AWS Cloud characteristic where resource usage is metered by the provider and customers are billed exactly for the quantity consumed. In this nightly batch job, the automatic tracking of instance-hours and the resulting pay-per-use invoice are direct expressions of this metering capability. Because AWS records each instance's run time and calculates cost accordingly, the scenario explicitly demonstrates measured service, not merely a pricing model but a core operational attribute of cloud computing.
- ✗
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.
When this WOULD be correct
A company runs a web application that experiences unpredictable traffic spikes. The application automatically adds EC2 instances during high load and removes them when demand drops, without manual intervention. This would best illustrate rapid elasticity.
- ✗
Broad network access
Why it's wrong here
Broad network access refers to the ability to reach cloud resources over the network using standard protocols (e.g., HTTPS, TLS) from a wide range of client devices such as laptops, phones, or on-premises servers. The scenario describes a nightly batch job that runs on a fixed set of instances but says nothing about how those instances are accessed, whether they are reachable over the internet, or which protocols or endpoints are used. Therefore, while AWS inherently supports broad network access, it is not the characteristic evidenced by the automatic tracking and billing of instance-hours.
When this WOULD be correct
A company uses a web application hosted on AWS that employees access from various locations using different devices (laptops, smartphones) over the internet. This illustrates broad network access because resources are available over the network and accessed through standard mechanisms.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Measured serviceCorrect answer▾
Why this is correct
Measured service is the AWS Cloud characteristic where resource usage is metered by the provider and customers are billed exactly for the quantity consumed. In this nightly batch job, the automatic tracking of instance-hours and the resulting pay-per-use invoice are direct expressions of this metering capability. Because AWS records each instance's run time and calculates cost accordingly, the scenario explicitly demonstrates measured service, not merely a pricing model but a core operational attribute of cloud computing.
✗Resource poolingWrong answer — click to see why▾
Why this is wrong here
Resource pooling refers to multi-tenant sharing of computing resources, but the scenario focuses on usage-based billing and no long-term contracts, which is about metering and charging for actual usage, not pooling.
★ When this WOULD be the correct answer
A question describing a cloud provider dynamically assigning virtual machines from a shared pool to multiple customers, where customers have no control over the physical location of resources, would make resource pooling the correct answer.
Why candidates choose this
Candidates may confuse resource pooling with the general idea of shared infrastructure in the cloud, but the key here is the billing model, not the multi-tenant aspect.
✗Rapid elasticityWrong answer — click to see why▾
Why this is wrong here
The scenario describes a fixed set of EC2 instances running nightly for exactly 2 hours, with no mention of automatically scaling capacity up or down based on demand. Rapid elasticity refers to the ability to quickly scale resources in and out, which is not demonstrated here.
★ When this WOULD be the correct answer
A company runs a web application that experiences unpredictable traffic spikes. The application automatically adds EC2 instances during high load and removes them when demand drops, without manual intervention. This would best illustrate rapid elasticity.
Why candidates choose this
Candidates may confuse the ability to provision resources on-demand (which is part of measured service) with the automatic scaling aspect of rapid elasticity, especially when the scenario involves time-bound usage.
✗Broad network accessWrong answer — click to see why▾
Why this is wrong here
Broad network access refers to the ability to access cloud resources over the network via standard protocols (e.g., internet). The scenario focuses on billing based on usage, not network accessibility.
★ When this WOULD be the correct answer
A company uses a web application hosted on AWS that employees access from various locations using different devices (laptops, smartphones) over the internet. This illustrates broad network access because resources are available over the network and accessed through standard mechanisms.
Why candidates choose this
Candidates may confuse 'broad network access' with general cloud accessibility, but the key here is the billing model, not network reach.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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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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