- A
High availability
Why wrong: High availability focuses on ensuring that applications remain accessible and functional during failures, often through redundancy across multiple Availability Zones. While Auto Scaling can contribute to availability, the primary purpose described here is scaling based on demand, not fault tolerance.
- B
Elasticity
Elasticity is the cloud computing characteristic that allows resources to be provisioned and de-provisioned automatically to match changing demand. The Auto Scaling configuration that adds and removes EC2 instances based on CPU utilization directly illustrates this concept.
- C
Fault tolerance
Why wrong: Fault tolerance is the ability of a system to continue operating properly in the event of a component failure. The scenario does not involve handling failures; it is about adjusting capacity to meet load changes.
- D
Global reach
Why wrong: Global reach refers to the ability to deploy applications in multiple geographic regions around the world to reduce latency and meet data residency requirements. The scenario focuses on scaling within a single region, not on geographic distribution.
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 gaming company launches a new online multiplayer game. During peak hours (evenings and weekends), the player count spikes dramatically, requiring dozens of Amazon EC2 instances to handle the load. During off-peak hours, the player count drops to near zero. The company configures an Amazon EC2 Auto Scaling group that automatically adds instances when CPU utilization exceeds 70% and removes instances when utilization drops below 30%. Which 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
Elasticity
Elasticity is the ability of a cloud system to automatically scale resources up or down based on demand. In this scenario, the Auto Scaling group dynamically adds EC2 instances when CPU utilization exceeds 70% and removes them when it drops below 30%, directly matching the fluctuating player load. This demonstrates elasticity because resources are provisioned and de-provisioned in real-time to match the exact workload, minimizing cost during low usage and ensuring performance during spikes.
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.
- ✗
High availability
Why it's wrong here
High availability focuses on ensuring that applications remain accessible and functional during failures, often through redundancy across multiple Availability Zones. While Auto Scaling can contribute to availability, the primary purpose described here is scaling based on demand, not fault tolerance.
- ✓
Elasticity
Why this is correct
Elasticity is the cloud computing characteristic that allows resources to be provisioned and de-provisioned automatically to match changing demand. The Auto Scaling configuration that adds and removes EC2 instances based on CPU utilization 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.
- ✗
Fault tolerance
Why it's wrong here
Fault tolerance is the ability of a system to continue operating properly in the event of a component failure. The scenario does not involve handling failures; it is about adjusting capacity to meet load changes.
- ✗
Global reach
Why it's wrong here
Global reach refers to the ability to deploy applications in multiple geographic regions around the world to reduce latency and meet data residency requirements. The scenario focuses on scaling within a single region, not on geographic distribution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse elasticity with high availability, but elasticity is specifically about scaling resources to match demand, while high availability is about maintaining uptime through redundancy and failover mechanisms.
Trap categories for this question
Scenario analysis trap
Fault tolerance is the ability of a system to continue operating properly in the event of a component failure. The scenario does not involve handling failures; it is about adjusting capacity to meet load changes.
Detailed technical explanation
How to think about this question
Under the hood, the Auto Scaling group uses a target tracking scaling policy that monitors the CloudWatch metric 'CPUUtilization' and calculates the desired capacity using a proportional-integral-derivative (PID) controller algorithm. This ensures smooth scaling without oscillation, even when player counts spike rapidly. In a real-world scenario, if the game experiences a sudden viral event, elasticity prevents performance degradation by launching instances within minutes, while also avoiding over-provisioning during quiet periods.
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: Elasticity — Elasticity is the ability of a cloud system to automatically scale resources up or down based on demand. In this scenario, the Auto Scaling group dynamically adds EC2 instances when CPU utilization exceeds 70% and removes them when it drops below 30%, directly matching the fluctuating player load. This demonstrates elasticity because resources are provisioned and de-provisioned in real-time to match the exact workload, minimizing cost during low usage and ensuring performance during spikes.
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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