- A
On-demand self-service
Why wrong: On-demand self-service describes the customer's ability to provision resources without provider interaction, not the provider's shared infrastructure model.
- B
Measured service
Why wrong: Measured service relates to usage metering and billing, not the multi-tenant infrastructure design.
- C
Resource pooling
Resource pooling is the cloud characteristic where the provider's resources are pooled to serve multiple customers simultaneously using virtualisation and multi-tenancy, with each customer's data remaining logically isolated.
- D
Rapid elasticity
Why wrong: Rapid elasticity refers to the ability to scale resources quickly to match demand, not the shared-infrastructure design of the provider.
Question 44 of 1,024
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.
AWS builds and operates large physical data centres and uses virtualisation to serve thousands of customers simultaneously on shared hardware while keeping each customer's data logically isolated. Which cloud computing characteristic does this 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
✓
Resource pooling
Resource pooling is the correct answer because AWS uses virtualization to aggregate physical hardware from its data centers into a shared pool of compute, storage, and network resources that can be dynamically assigned and reassigned to multiple customers. Each customer's data remains logically isolated through hypervisor-level isolation (e.g., using Xen or Nitro hypervisors), but the underlying hardware is shared, which is the essence of resource pooling as defined by NIST SP 800-145.
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 describes the customer's ability to provision resources without provider interaction, not the provider's shared infrastructure model.
- ✗
Measured service
Why it's wrong here
Measured service relates to usage metering and billing, not the multi-tenant infrastructure design.
- ✓
Resource pooling
Why this is correct
Resource pooling is the cloud characteristic where the provider's resources are pooled to serve multiple customers simultaneously using virtualisation and multi-tenancy, with each customer's data remaining logically isolated.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Rapid elasticity
Why it's wrong here
Rapid elasticity refers to the ability to scale resources quickly to match demand, not the shared-infrastructure design of the provider.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse resource pooling with rapid elasticity, because both involve dynamic allocation, but resource pooling is about the shared infrastructure model, while rapid elasticity is about the speed of scaling resources up or down.
Detailed technical explanation
How to think about this question
Under the hood, AWS uses the Nitro hypervisor to abstract physical hardware (CPU, memory, storage) into virtual machines (VMs) that are allocated from a shared pool across multiple Availability Zones. This pooling allows AWS to achieve high utilization rates (often >80%) while maintaining strict logical separation via hardware-assisted virtualization (e.g., Intel VT-x) and dedicated network interfaces (ENA). A real-world scenario is a single physical server hosting EC2 instances from different customers, where each instance has its own virtualized network stack and encrypted memory regions.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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: Resource pooling — Resource pooling is the correct answer because AWS uses virtualization to aggregate physical hardware from its data centers into a shared pool of compute, storage, and network resources that can be dynamically assigned and reassigned to multiple customers. Each customer's data remains logically isolated through hypervisor-level isolation (e.g., using Xen or Nitro hypervisors), but the underlying hardware is shared, which is the essence of resource pooling as defined by NIST SP 800-145.
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.
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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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