- A
Elasticity
Elasticity is the correct characteristic because the Auto Scaling group automatically adjusts the number of EC2 instances based on real-time CPU utilization, matching supply to demand without manual intervention.
- B
High availability
Why wrong: High availability refers to designing systems to remain operational despite component failures, typically by distributing resources across multiple Availability Zones. While Auto Scaling can support availability, the core behavior described is scaling based on load, not fault tolerance.
- C
Security
Why wrong: Security involves protecting data, applications, and infrastructure from threats. This scenario does not involve any security mechanisms such as encryption, access controls, or threat detection.
- D
Cost management
Why wrong: Cost management involves monitoring and optimizing spending. While elasticity can lead to cost savings by only using resources when needed, the primary characteristic demonstrated is the dynamic scaling capability, not the act of managing costs.
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. A key principle to apply: elasticity is the ability to scale resources up or down automatically based on demand.. 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 customer-facing web application on Amazon EC2 instances. The application experiences unpredictable traffic patterns, with occasional spikes during marketing campaigns and lulls at other times. The company configures an Auto Scaling group to automatically add EC2 instances when CPU utilization exceeds 70% and remove instances when it drops below 30%. This ability to scale computing resources up and down in response to demand best represents which essential characteristic of cloud computing?
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
The scenario describes an Auto Scaling group that dynamically adjusts the number of EC2 instances based on CPU utilization thresholds (70% scale-up, 30% scale-down). This ability to automatically provision and de-provision computing resources to match demand is the defining characteristic of elasticity in cloud computing, which allows resources to scale out during spikes and scale in during lulls, optimizing cost and performance.
Key principle: Elasticity is the ability to scale resources up or down automatically based on demand.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Elasticity
Why this is correct
Elasticity is the correct characteristic because the Auto Scaling group automatically adjusts the number of EC2 instances based on real-time CPU utilization, matching supply to demand without manual intervention.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Elasticity is the ability to scale resources up or down automatically based on demand.
- ✗
High availability
Why it's wrong here
High availability refers to designing systems to remain operational despite component failures, typically by distributing resources across multiple Availability Zones. While Auto Scaling can support availability, the core behavior described is scaling based on load, not fault tolerance.
- ✗
Security
Why it's wrong here
Security involves protecting data, applications, and infrastructure from threats. This scenario does not involve any security mechanisms such as encryption, access controls, or threat detection.
- ✗
Cost management
Why it's wrong here
Cost management involves monitoring and optimizing spending. While elasticity can lead to cost savings by only using resources when needed, the primary characteristic demonstrated is the dynamic scaling capability, not the act of managing costs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse elasticity with high availability, but elasticity is specifically about scaling resources up and down to match demand, while high availability is about maintaining uptime through redundancy and fault tolerance.
Trap categories for this question
Scenario analysis trap
Security involves protecting data, applications, and infrastructure from threats. This scenario does not involve any security mechanisms such as encryption, access controls, or threat detection.
Detailed technical explanation
How to think about this question
Under the hood, Amazon EC2 Auto Scaling uses CloudWatch alarms to monitor CPU utilization metrics and triggers scaling policies that adjust the desired capacity of the Auto Scaling group. The cooldown period prevents rapid fluctuations, and predictive scaling can use historical data to proactively launch instances before a spike. In real-world scenarios, elasticity is critical for e-commerce sites during flash sales, where failing to scale quickly can lead to downtime and lost revenue.
KKey Concepts to Remember
- Elasticity is the ability to scale resources up or down automatically based on demand.
- AWS Auto Scaling groups are a primary mechanism for achieving elasticity with EC2.
- Elasticity helps optimize costs by paying only for resources actively used.
- Scaling policies (e.g., target tracking, simple, step) define how Auto Scaling adjusts capacity.
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
Elasticity is the ability to scale resources up or down automatically based on demand.
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.
Review elasticity is the ability to scale resources up or down automatically based on demand., then practise related CLF-C02 questions on the same topic to reinforce the concept.
- →
Cloud Concepts — study guide chapter
Learn the concepts, then practise the questions
- →
Cloud Concepts practice questions
Targeted practice on this topic area only
- →
All CLF-C02 questions
1,024 questions across all exam domains
- →
AWS Certified Cloud Practitioner CLF-C02 study guide
Full concept coverage aligned to exam objectives
- →
CLF-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related CLF-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Cloud Concepts practice questions
Practise CLF-C02 questions linked to Cloud Concepts.
Security and Compliance practice questions
Practise CLF-C02 questions linked to Security and Compliance.
Cloud Technology and Services practice questions
Practise CLF-C02 questions linked to Cloud Technology and Services.
Billing, Pricing, and Support practice questions
Practise CLF-C02 questions linked to Billing, Pricing, and Support.
AWS shared responsibility model practice questions
Practise CLF-C02 questions linked to AWS shared responsibility model.
AWS IAM practice questions
Practise CLF-C02 questions linked to AWS IAM.
AWS pricing practice questions
Practise CLF-C02 questions linked to AWS pricing.
AWS support plans practice questions
Practise CLF-C02 questions linked to AWS support plans.
AWS S3 practice questions
Practise CLF-C02 questions linked to AWS S3.
AWS EC2 practice questions
Practise CLF-C02 questions linked to AWS EC2.
Practice this exam
Start a free CLF-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Concepts — This question tests Cloud Concepts — Elasticity is the ability to scale resources up or down automatically based on demand..
What is the correct answer to this question?
The correct answer is: Elasticity — The scenario describes an Auto Scaling group that dynamically adjusts the number of EC2 instances based on CPU utilization thresholds (70% scale-up, 30% scale-down). This ability to automatically provision and de-provision computing resources to match demand is the defining characteristic of elasticity in cloud computing, which allows resources to scale out during spikes and scale in during lulls, optimizing cost and performance.
What should I do if I get this CLF-C02 question wrong?
Review elasticity is the ability to scale resources up or down automatically based on demand., then practise related CLF-C02 questions on the same topic to reinforce the concept.
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?
Elasticity is the ability to scale resources up or down automatically based on demand.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More CLF-C02 practice questions
- A company publishes a message each time a new product is added to its catalogue. Three services need to receive this mes…
- A media company stores frequently accessed video thumbnails in Amazon S3. The thumbnails are read multiple times every d…
- A company needs a service to translate domain names (like www.example.com) into IP addresses, check the health of their…
- A startup runs an application on AWS and receives a monthly bill that charges exactly for the number of compute hours us…
- A financial institution runs its core banking application on-premises due to regulatory requirements. It has connected i…
- A company wants to run a MySQL database in AWS without managing database software installation, applying patches, settin…
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.