Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A startup runs its web application on a few Amazon EC2 instances. Over time, the company scales its infrastructure, adding hundreds more instances to support a growing user base. The company notices that the per-hour cost per instance does not increase as it uses more resources. In fact, AWS has steadily lowered prices for compute and storage services over the years. Which cloud computing concept does this scenario best illustrate?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
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Elasticity
Elasticity refers to the ability to automatically scale resources up or down based on demand. While the startup scaled its infrastructure, the key takeaway is that the cost per instance remained stable or decreased, not the ability to scale. Elasticity does not inherently explain pricing trends.
B
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Pay-as-you-go pricing
Pay-as-you-go pricing means customers pay only for the resources they consume, with no upfront commitments. This model is part of the scenario, but it does not directly explain why the per-unit cost stays low or decreases as usage grows. Pay-as-you-go is about billing granularity, not cost advantages from scale.
C
Best answer
Economies of scale
Correct. Economies of scale describe how AWS, by serving millions of customers worldwide, can purchase hardware, operate data centers, and negotiate contracts at massive volumes, achieving lower costs per unit. These savings are then reflected in lower prices for all customers, regardless of their individual consumption level.
D
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High availability
High availability refers to systems being operational and accessible with minimal downtime, often achieved through redundancy across multiple Availability Zones. The scenario does not discuss system uptime or fault tolerance; it focuses on cost behavior as usage scales.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
A solutions architect is planning a new web application on AWS. The workload will include 3 Amazon EC2 instances (t3.medium) running 24/7, an Application Load Balancer, and an Amazon RDS for MySQL db.t3.small database. The architect needs to estimate the monthly cost for the first year, considering different purchasing options (On-Demand, 1-year All Upfront Reserved Instance, and Compute Savings Plan). Which AWS tool should the architect use to create this estimate?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Economies of scale — This scenario illustrates the economies of scale concept in cloud computing. AWS builds and operates massive global infrastructure, which allows it to achieve lower per-unit costs. These savings are passed on to customers in the form of lower prices over time. Economies of scale mean that the cost per unit of service decreases as the scale of operations increases. This is a fundamental advantage of cloud providers over individual organizations building and managing their own data centers.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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