CLF-C02 Cloud Concepts Practice Question
A company runs a web application on AWS that experiences unpredictable traffic spikes. The operations team wants the infrastructure to automatically add compute capacity when demand increases and remove it when demand decreases, without manual intervention. The team also wants to pay only for the compute resources they actually use. Which cloud computing concept does this scenario best describe?
⚠ Common exam trap
Many exam-takers confuse 'pay-as-you-go' (a billing model) with 'elasticity' (the operational capability to scale), but the question explicitly asks for the concept that enables automatic scaling, not just the cost benefit.
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, AWS services like Auto Scaling groups and Amazon EC2 can add instances during traffic spikes and terminate them when demand drops, ensuring the infrastructure matches workload requirements without manual intervention.
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 refers to the ability of a system to remain operational and accessible for a high percentage of time, typically through redundancy and failover mechanisms. While important for uptime, it does not specifically describe the automatic scaling of resources based on demand.
When this WOULD be correct
A question that asks: 'A company needs its web application to remain accessible even if an Availability Zone fails. Which concept does this describe?' would make high availability the correct answer.
- ✓
Elasticity
Why this is correct
Elasticity is the ability to provision and de-provision computing resources automatically to match workload demands. This concept allows the company to handle traffic spikes without manual intervention and only pay for resources consumed, directly matching the scenario.
- ✗
Fault tolerance
Why it's wrong here
Fault tolerance is the ability of a system to continue operating without interruption when one or more of its components fail. It often involves redundancy and automatic failover, but it does not address scaling resources up and down in response to workload changes.
When this WOULD be correct
A question asks: 'A company needs its application to remain operational even if an entire AWS Availability Zone fails. Which concept does this requirement describe?' Here, fault tolerance would be the correct answer.
- ✗
Pay-as-you-go
Why it's wrong here
Pay-as-you-go is a pricing model where customers pay only for the resources they consume, with no upfront commitments. While the scenario mentions paying only for what is used, the primary focus is on the automatic scaling of capacity, which is a characteristic of elasticity, not of the pricing model alone.
When this WOULD be correct
A company wants to minimize upfront costs and only pay for the compute resources consumed each month, without long-term commitments. The question would ask: 'Which cloud computing concept allows a company to avoid large upfront investments and pay only for what they use?'
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.
✓ElasticityCorrect answer▾
Why this is correct
Elasticity is the ability to provision and de-provision computing resources automatically to match workload demands. This concept allows the company to handle traffic spikes without manual intervention and only pay for resources consumed, directly matching the scenario.
✗High availabilityWrong answer — click to see why▾
Why this is wrong here
High availability focuses on ensuring the application remains accessible and operational during failures, not on automatically scaling resources up and down in response to demand changes.
★ When this WOULD be the correct answer
A question that asks: 'A company needs its web application to remain accessible even if an Availability Zone fails. Which concept does this describe?' would make high availability the correct answer.
Why candidates choose this
Candidates may confuse high availability with elasticity because both involve handling variable conditions, but high availability is about uptime and redundancy, not dynamic scaling.
✗Fault toleranceWrong answer — click to see why▾
Why this is wrong here
Fault tolerance ensures the system continues operating despite component failures, but it does not address automatically scaling compute resources up or down based on demand.
★ When this WOULD be the correct answer
A question asks: 'A company needs its application to remain operational even if an entire AWS Availability Zone fails. Which concept does this requirement describe?' Here, fault tolerance would be the correct answer.
Why candidates choose this
Candidates may confuse fault tolerance with elasticity because both involve maintaining performance under changing conditions, but fault tolerance focuses on failure resilience, not dynamic scaling.
✗Pay-as-you-goWrong answer — click to see why▾
Why this is wrong here
The question emphasizes automatic scaling of compute resources in response to demand, which is elasticity. Pay-as-you-go is a pricing model that charges for actual usage, but it does not describe the ability to automatically add or remove capacity.
★ When this WOULD be the correct answer
A company wants to minimize upfront costs and only pay for the compute resources consumed each month, without long-term commitments. The question would ask: 'Which cloud computing concept allows a company to avoid large upfront investments and pay only for what they use?'
Why candidates choose this
Candidates may confuse the pay-as-you-go pricing model with the operational characteristic of elasticity, since both involve paying only for what you use, but elasticity specifically refers to automatic scaling.
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?”
Go deeper
Related to this question
About these practice questions
Courseiva writes every CLF-C02 question from scratch — 988 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.