- A
On-demand self-service
Why wrong: On-demand self-service allows users to provision resources without requiring human interaction with the provider. While the company can initially configure the Auto Scaling group via the AWS Management Console or API, the scenario focuses on the automatic scaling behavior itself, not the self-service provisioning.
- B
Broad network access
Why wrong: Broad network access means that resources are accessible over the network by a wide range of client devices (e.g., laptops, phones). The scenario does not mention device diversity or network accessibility as the key benefit.
- C
Rapid elasticity
Rapid elasticity is the ability to quickly and automatically scale computing resources up or down to match demand. The Auto Scaling group adding and removing EC2 instances based on CPU thresholds is a direct example of this characteristic.
- D
Measured service
Why wrong: Measured service means that cloud resource usage is metered and billed on a pay-as-you-go basis. While the company benefits from paying only for the capacity used, the scenario primarily highlights the automatic scaling capability, not the metering or billing aspect.
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 web application on Amazon EC2 instances. The application experiences unpredictable traffic spikes during marketing campaigns. The company configures an Amazon EC2 Auto Scaling group to automatically add instances when CPU utilization exceeds 70% and remove instances when it drops below 30%. This allows the company to handle peak loads without manual intervention and avoid paying for idle capacity during low traffic periods. Which essential characteristic of cloud computing does this configuration BEST demonstrate?
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
Rapid elasticity
The Auto Scaling group dynamically adjusts the number of EC2 instances in response to CPU utilization thresholds, scaling out during traffic spikes and scaling in during low traffic. This ability to rapidly provision and release compute resources to match demand is the defining characteristic of rapid elasticity, which allows the company to handle peak loads without manual intervention and avoid paying for idle capacity.
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.
- ✗
On-demand self-service
Why it's wrong here
On-demand self-service allows users to provision resources without requiring human interaction with the provider. While the company can initially configure the Auto Scaling group via the AWS Management Console or API, the scenario focuses on the automatic scaling behavior itself, not the self-service provisioning.
- ✗
Broad network access
Why it's wrong here
Broad network access means that resources are accessible over the network by a wide range of client devices (e.g., laptops, phones). The scenario does not mention device diversity or network accessibility as the key benefit.
- ✓
Rapid elasticity
Why this is correct
Rapid elasticity is the ability to quickly and automatically scale computing resources up or down to match demand. The Auto Scaling group adding and removing EC2 instances based on CPU thresholds is a direct example of this characteristic.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Measured service
Why it's wrong here
Measured service means that cloud resource usage is metered and billed on a pay-as-you-go basis. While the company benefits from paying only for the capacity used, the scenario primarily highlights the automatic scaling capability, not the metering or billing aspect.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse rapid elasticity with on-demand self-service, but on-demand self-service is about the ability to provision resources without human interaction, while rapid elasticity is about automatically scaling resources up or down to match demand in near real-time.
Trap categories for this question
Scenario analysis trap
On-demand self-service allows users to provision resources without requiring human interaction with the provider. While the company can initially configure the Auto Scaling group via the AWS Management Console or API, the scenario focuses on the automatic scaling behavior itself, not the self-service provisioning.
Detailed technical explanation
How to think about this question
Rapid elasticity is enabled by Auto Scaling groups that use CloudWatch alarms to trigger scaling policies based on metrics like CPUUtilization. Under the hood, the Auto Scaling group launches new EC2 instances from a launch template or configuration, registers them with a load balancer, and terminates instances when the metric drops below the threshold. A subtle behavior is the cooldown period, which prevents rapid flapping by delaying subsequent scaling activities after a scaling event, ensuring stability during volatile traffic patterns.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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: Rapid elasticity — The Auto Scaling group dynamically adjusts the number of EC2 instances in response to CPU utilization thresholds, scaling out during traffic spikes and scaling in during low traffic. This ability to rapidly provision and release compute resources to match demand is the defining characteristic of rapid elasticity, which allows the company to handle peak loads without manual intervention and avoid paying for idle capacity.
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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