- A
On-demand self-service
Why wrong: On-demand self-service means a consumer can provision computing capabilities unilaterally, without requiring human interaction with the provider. The scenario describes shared infrastructure, not the ability to self-provision resources.
- B
Resource pooling
Resource pooling is the correct answer. The scenario explicitly describes shared physical infrastructure serving many customers with logical isolation, which is the essence of resource pooling in cloud computing.
- C
Broad network access
Why wrong: Broad network access means that resources are available over the network and accessed through standard mechanisms (e.g., mobile phones, laptops). The scenario does not discuss network access methods.
- D
Rapid elasticity
Why wrong: Rapid elasticity refers to the ability to quickly scale resources up and down, often automatically, in response to demand. The scenario does not mention scaling or dynamically adjusting capacity.
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 cloud provider uses shared physical infrastructure to serve many customers. Each customer's compute and storage resources are logically isolated and secure, but the underlying hardware is pooled across all customers. Which essential characteristic of cloud computing does this scenario BEST describe?
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
Resource pooling
Resource pooling is the correct characteristic because the scenario describes a multi-tenant model where physical and virtual resources are dynamically assigned and reassigned according to consumer demand. The cloud provider's shared infrastructure (compute, storage, network) is pooled to serve multiple customers, with logical isolation ensuring each customer's data remains secure despite the shared underlying hardware. This directly matches the NIST SP 800-145 definition of resource pooling.
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.
- ✗
On-demand self-service
Why it's wrong here
On-demand self-service means a consumer can provision computing capabilities unilaterally, without requiring human interaction with the provider. The scenario describes shared infrastructure, not the ability to self-provision resources.
- ✓
Resource pooling
Why this is correct
Resource pooling is the correct answer. The scenario explicitly describes shared physical infrastructure serving many customers with logical isolation, which is the essence of resource pooling in cloud computing.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Broad network access
Why it's wrong here
Broad network access means that resources are available over the network and accessed through standard mechanisms (e.g., mobile phones, laptops). The scenario does not discuss network access methods.
- ✗
Rapid elasticity
Why it's wrong here
Rapid elasticity refers to the ability to quickly scale resources up and down, often automatically, in response to demand. The scenario does not mention scaling or dynamically adjusting capacity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'resource pooling' with 'on-demand self-service' because both involve shared infrastructure, but the key distinction is that resource pooling focuses on the provider's multi-tenant architecture, not the consumer's ability to provision resources without human interaction.
Trap categories for this question
Scenario analysis trap
On-demand self-service means a consumer can provision computing capabilities unilaterally, without requiring human interaction with the provider. The scenario describes shared infrastructure, not the ability to self-provision resources.
Detailed technical explanation
How to think about this question
Under the hood, resource pooling is implemented via hypervisor-level virtualization (e.g., Xen, KVM, or VMware ESXi) that abstracts physical CPUs, RAM, and storage into virtual resources, allowing dynamic allocation across tenants. AWS Nitro System, for example, offloads virtualization functions to dedicated hardware, enabling near-bare-metal performance while still pooling resources. In real-world scenarios, this means a single physical server might host EC2 instances for multiple AWS accounts, with hypervisor-enforced memory and I/O isolation (using Intel VT-x or AMD-V) to prevent cross-tenant data leakage.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: Resource pooling — Resource pooling is the correct characteristic because the scenario describes a multi-tenant model where physical and virtual resources are dynamically assigned and reassigned according to consumer demand. The cloud provider's shared infrastructure (compute, storage, network) is pooled to serve multiple customers, with logical isolation ensuring each customer's data remains secure despite the shared underlying hardware. This directly matches the NIST SP 800-145 definition of resource pooling.
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.
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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