- A
High availability
Why wrong: High availability focuses on ensuring that applications remain operational and accessible despite component failures. It does not directly address automatic scaling of capacity based on demand.
- B
Elasticity
Elasticity is the ability to automatically provision and release compute resources to match the current workload. This directly supports the described requirement for adjusting capacity in response to traffic spikes while minimizing costs.
- C
Disaster recovery
Why wrong: Disaster recovery involves preparing for and recovering from catastrophic events that cause application downtime. It does not address real-time scaling of capacity to meet variable demand.
- D
Resource pooling
Why wrong: Resource pooling refers to the cloud provider's ability to serve multiple customers from a shared pool of physical resources using multi-tenancy. While related to efficiency, it does not describe the automatic scaling behavior in response to demand changes.
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 an e-commerce platform on AWS. The platform experiences unpredictable traffic, with occasional large spikes. The company wants to automatically adjust compute capacity to match demand exactly, ensuring consistent performance while only paying for the resources consumed. Which benefit of the AWS Cloud does this scenario primarily describe?
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 AWS to automatically scale compute resources up or down based on demand. In this scenario, the e-commerce platform experiences unpredictable traffic spikes, and elasticity ensures that EC2 instances or Auto Scaling groups adjust capacity in real time, matching demand exactly while only charging for resources consumed. This directly aligns with the 'pay-as-you-grow' model and the operational benefit of scaling without manual intervention.
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 operational and accessible despite component failures. It does not directly address automatic scaling of capacity based on demand.
- ✓
Elasticity
Why this is correct
Elasticity is the ability to automatically provision and release compute resources to match the current workload. This directly supports the described requirement for adjusting capacity in response to traffic spikes while minimizing costs.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disaster recovery
Why it's wrong here
Disaster recovery involves preparing for and recovering from catastrophic events that cause application downtime. It does not address real-time scaling of capacity to meet variable demand.
- ✗
Resource pooling
Why it's wrong here
Resource pooling refers to the cloud provider's ability to serve multiple customers from a shared pool of physical resources using multi-tenancy. While related to efficiency, it does not describe the automatic scaling behavior in response to demand changes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse elasticity with high availability, thinking that automatically adding more servers during a spike also ensures fault tolerance, but elasticity is specifically about matching capacity to demand, not about maintaining uptime during failures.
Detailed technical explanation
How to think about this question
Under the hood, AWS Elasticity is implemented via services like Auto Scaling Groups (ASG) and Elastic Load Balancing (ELB), which use CloudWatch metrics (e.g., CPU utilization, request count) to trigger scaling policies. A subtle behavior is that ASGs can also use predictive scaling based on historical patterns, but for unpredictable spikes, target tracking scaling policies adjust capacity in near real-time. In a real-world scenario, a flash sale might trigger a scale-out event that adds dozens of EC2 instances within minutes, then scales back down to save costs once traffic subsides.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Elasticity — Elasticity is the ability of AWS to automatically scale compute resources up or down based on demand. In this scenario, the e-commerce platform experiences unpredictable traffic spikes, and elasticity ensures that EC2 instances or Auto Scaling groups adjust capacity in real time, matching demand exactly while only charging for resources consumed. This directly aligns with the 'pay-as-you-grow' model and the operational benefit of scaling without manual intervention.
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.
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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