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Cloud Concepts →mediumMultiple ChoiceObjective-mapped

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.

A small e-commerce company currently hosts its website on a single physical server in a colocation facility. The company pays a fixed monthly fee for the server, power, and bandwidth, regardless of actual usage. The CTO is evaluating AWS and notes that AWS operates millions of servers across multiple data centers, allowing it to negotiate lower prices for hardware and pass those savings to customers. The CTO expects that migrating to AWS will reduce the company's per-unit costs. Which benefit 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.

Question 1mediummultiple choice

Full question →

A
High availability
Why wrong: High availability refers to systems that are designed to remain operational even when individual components fail, typically through redundancy across multiple Availability Zones. While AWS offers high availability, the scenario specifically highlights cost advantages from large-scale purchasing, not system uptime.
B
Elasticity
Why wrong: Elasticity is the ability to automatically scale resources up or down based on demand. Although AWS provides elasticity, the scenario focuses on the cost reduction arising from AWS's large-scale operations, not on the ability to adjust resource capacity dynamically.
C
Economy of scale
Economy of scale is the correct answer. The scenario explicitly describes how AWS's massive infrastructure footprint enables lower per-unit costs that are passed to customers. This is a core benefit of cloud computing: customers benefit from the provider's ability to achieve cost efficiencies that are impossible for a single organization to match.
D
Fault tolerance
Why wrong: Fault tolerance is the ability of a system to continue operating without interruption when one or more components fail. While AWS provides fault-tolerant services, the scenario does not discuss system resilience or failure handling; it centers on cost advantages from scale.

Full breakdown with real-world context →

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

✓

Economy of scale

The scenario describes how AWS leverages its massive scale of operations—millions of servers across multiple data centers—to negotiate lower hardware prices from suppliers and pass those savings to customers. This is the definition of economy of scale: as the volume of production increases, the cost per unit decreases. The CTO expects that migrating to AWS will reduce the company's per-unit costs, which directly aligns with this cloud computing benefit.

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.

✗
High availability
Why it's wrong here
High availability refers to systems that are designed to remain operational even when individual components fail, typically through redundancy across multiple Availability Zones. While AWS offers high availability, the scenario specifically highlights cost advantages from large-scale purchasing, not system uptime.
✗
Elasticity
Why it's wrong here
Elasticity is the ability to automatically scale resources up or down based on demand. Although AWS provides elasticity, the scenario focuses on the cost reduction arising from AWS's large-scale operations, not on the ability to adjust resource capacity dynamically.
✓
Economy of scale
Why this is correct
Economy of scale is the correct answer. The scenario explicitly describes how AWS's massive infrastructure footprint enables lower per-unit costs that are passed to customers. This is a core benefit of cloud computing: customers benefit from the provider's ability to achieve cost efficiencies that are impossible for a single organization to match.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Fault tolerance
Why it's wrong here
Fault tolerance is the ability of a system to continue operating without interruption when one or more components fail. While AWS provides fault-tolerant services, the scenario does not discuss system resilience or failure handling; it centers on cost advantages from scale.

Common exam traps

Common exam trap: answer the scenario, not the keyword

AWS often tests the distinction between economy of scale (cost reduction from volume) and elasticity (cost reduction from right-sizing usage), so candidates may confuse the two because both can lower costs, but the mechanism is fundamentally different.

Trap categories for this question

Scenario analysis trap
High availability refers to systems that are designed to remain operational even when individual components fail, typically through redundancy across multiple Availability Zones. While AWS offers high availability, the scenario specifically highlights cost advantages from large-scale purchasing, not system uptime.

Detailed technical explanation

How to think about this question

Economy of scale in cloud computing is driven by massive procurement volumes—AWS can negotiate bulk discounts on CPUs, memory, and storage from vendors like Intel and Samsung, and also achieves operational efficiencies in power and cooling across its global infrastructure. This cost advantage is passed to customers through lower per-hour or per-GB pricing, which is why AWS can offer services like EC2 at rates that a single-tenant colocation facility cannot match. In practice, this means a small company can access enterprise-grade infrastructure at a fraction of the cost it would pay for a dedicated physical server.

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 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.

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: Economy of scale — The scenario describes how AWS leverages its massive scale of operations—millions of servers across multiple data centers—to negotiate lower hardware prices from suppliers and pass those savings to customers. This is the definition of economy of scale: as the volume of production increases, the cost per unit decreases. The CTO expects that migrating to AWS will reduce the company's per-unit costs, which directly aligns with this cloud computing benefit.

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.

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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.