CLF-C02 Cloud Concepts Practice Question
A company is migrating its customer-facing web application to AWS. The Chief Information Security Officer (CISO) is reviewing the division of security responsibilities. The CISO understands that AWS is responsible for the security of the physical data centers, hardware, and network infrastructure. The company, as the customer, is responsible for securing the application code, customer data, and operating system patches on Amazon EC2 instances. This division of security responsibilities is an example of which fundamental cloud computing concept?
⚠ Common exam trap
Test-takers frequently confuse the shared responsibility model with elasticity or resource pooling, because all three are fundamental cloud concepts, but only the shared responsibility model defines security ownership boundaries.
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
✓
Shared responsibility model
The shared responsibility model. This model delineates security obligations between AWS and the customer: AWS secures the cloud infrastructure (physical data centers, hardware, network), while the customer secures what is in the cloud (application code, customer data, OS patches on EC2 instances). The scenario directly describes this division, making it a textbook example of the shared responsibility model.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Resource pooling
Why it's wrong here
Resource pooling refers to the ability of a cloud provider to serve multiple customers from shared physical resources, with dynamic assignment of virtual and physical resources to meet demand. It does not define the split of security responsibilities.
When this WOULD be correct
Resource pooling would be correct in a question asking about how AWS uses multi-tenant models to serve multiple customers from shared physical resources, such as in a question about the benefits of cloud computing where the provider dynamically assigns resources to customers.
- ✓
Shared responsibility model
Why this is correct
The shared responsibility model clearly delineates between AWS's responsibility for the security of the underlying cloud infrastructure and the customer's responsibility for securing their data, applications, and configurations. This is the correct concept described in the scenario.
- ✗
Elasticity
Why it's wrong here
Elasticity is the ability of a cloud environment to automatically adjust compute capacity in response to real-time demand, such as adding EC2 instances during load spikes and removing them afterward. This capability directly supports availability and cost optimization, but it does not define how security responsibilities are distributed between AWS and the customer. The division of security tasks is established exclusively by the shared responsibility model, so elasticity would be a capacity-management mechanism, not a security-governance framework.
When this WOULD be correct
A question asks: 'A company experiences unpredictable traffic spikes. Which cloud computing concept allows them to automatically add or remove EC2 instances to handle the load?' Elasticity would be the correct answer.
- ✗
Measured service
Why it's wrong here
Measured service is the cloud's metered, pay-per-use billing characteristic, where resource consumption such as compute, storage, and bandwidth is continuously monitored, reported, and invoiced. This attribute provides cost transparency and usage analytics, but it is a financial and operational mechanism rather than a security-related concept. The scenario asks who is accountable for which security controls, and that accountability is determined by the shared responsibility model, not by how resource usage is measured or billed.
When this WOULD be correct
A question asks: 'Which cloud computing concept describes the ability to monitor, control, and report on resource usage for billing purposes?'
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.
✓Shared responsibility modelCorrect answer▾
Why this is correct
The shared responsibility model clearly delineates between AWS's responsibility for the security of the underlying cloud infrastructure and the customer's responsibility for securing their data, applications, and configurations. This is the correct concept described in the scenario.
✗Resource poolingWrong answer — click to see why▾
Why this is wrong here
The question describes the division of security responsibilities between AWS and the customer, which is the definition of the shared responsibility model, not resource pooling.
★ When this WOULD be the correct answer
Resource pooling would be correct in a question asking about how AWS uses multi-tenant models to serve multiple customers from shared physical resources, such as in a question about the benefits of cloud computing where the provider dynamically assigns resources to customers.
Why candidates choose this
Candidates may confuse resource pooling with the shared responsibility model because both involve the concept of shared resources or responsibilities, but resource pooling refers to infrastructure sharing, not security duties.
✗ElasticityWrong answer — click to see why▾
Why this is wrong here
Elasticity refers to the ability to automatically scale resources up or down based on demand, not to the division of security responsibilities between AWS and the customer.
★ When this WOULD be the correct answer
A question asks: 'A company experiences unpredictable traffic spikes. Which cloud computing concept allows them to automatically add or remove EC2 instances to handle the load?' Elasticity would be the correct answer.
Why candidates choose this
Candidates may confuse elasticity with the shared responsibility model because both involve dynamic aspects of cloud computing, but elasticity is about scaling, not security roles.
✗Measured serviceWrong answer — click to see why▾
Why this is wrong here
Measured service refers to the metering and billing of cloud resource usage, not the division of security responsibilities between AWS and the customer.
★ When this WOULD be the correct answer
A question asks: 'Which cloud computing concept describes the ability to monitor, control, and report on resource usage for billing purposes?'
Why candidates choose this
Candidates may confuse 'measured service' with 'shared responsibility' because both involve accountability, but measured service is about usage tracking, not security roles.
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
One of 988 original CLF-C02 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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.