- A
AWS Budgets
Why wrong: Incorrect. AWS Budgets allows you to set custom budgets to track your cost and usage and alerts you when you exceed thresholds. It does not analyze historical usage to provide purchase recommendations for Reserved Instances or Savings Plans.
- B
AWS Cost Explorer
Correct. AWS Cost Explorer has a built-in tool that analyzes your historical EC2 (and other service) usage and provides recommendations for purchasing Reserved Instances and Savings Plans, including options with size flexibility to maximize savings.
- C
AWS Trusted Advisor
Why wrong: Incorrect. AWS Trusted Advisor inspects your AWS environment and provides best practice recommendations in five categories, including cost optimization. Its cost checks identify idle or underutilized resources, but it does not provide the specific Reserved Instance or Savings Plans purchase recommendations that come from Cost Explorer.
- D
AWS Pricing Calculator
Why wrong: Incorrect. AWS Pricing Calculator is used to estimate the cost of running AWS services before you provision them. It does not have access to your historical usage data and therefore cannot generate purchase recommendations based on your past usage patterns.
CLF-C02 Billing, Pricing, and Support Practice Question
This CLF-C02 practice question tests your understanding of billing, pricing, and support. 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 company runs a fleet of production Amazon EC2 instances that operate 24/7 throughout the year. The CFO wants to reduce compute costs by committing to a consistent usage level. The finance team needs a tool that analyzes the company's historical EC2 usage and provides recommendations for the most cost-effective purchase options, including recommendations for both Reserved Instances and Savings Plans, with support for instance size flexibility. Which AWS tool should the finance team use?
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
AWS Cost Explorer
AWS Cost Explorer provides a comprehensive analysis of historical EC2 usage and generates tailored recommendations for both Reserved Instances (RI) and Savings Plans, including support for instance size flexibility. This directly meets the CFO's requirement to commit to a consistent usage level while optimizing costs based on actual usage patterns.
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.
- ✗
AWS Budgets
Why it's wrong here
Incorrect. AWS Budgets allows you to set custom budgets to track your cost and usage and alerts you when you exceed thresholds. It does not analyze historical usage to provide purchase recommendations for Reserved Instances or Savings Plans.
When this WOULD be correct
A company needs to set a cost budget for EC2 usage and receive alerts when spending exceeds a threshold. The finance team wants to monitor costs and get notified of overspending.
- ✓
AWS Cost Explorer
Why this is correct
Correct. AWS Cost Explorer has a built-in tool that analyzes your historical EC2 (and other service) usage and provides recommendations for purchasing Reserved Instances and Savings Plans, including options with size flexibility to maximize savings.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Trusted Advisor
Why it's wrong here
Incorrect. AWS Trusted Advisor inspects your AWS environment and provides best practice recommendations in five categories, including cost optimization. Its cost checks identify idle or underutilized resources, but it does not provide the specific Reserved Instance or Savings Plans purchase recommendations that come from Cost Explorer.
When this WOULD be correct
A company wants a high-level review of their AWS account to identify cost optimization opportunities, security gaps, and performance improvements. The question would ask: 'Which AWS service provides best practice checks and recommendations across cost, performance, security, and fault tolerance?'
- ✗
AWS Pricing Calculator
Why it's wrong here
Incorrect. AWS Pricing Calculator is used to estimate the cost of running AWS services before you provision them. It does not have access to your historical usage data and therefore cannot generate purchase recommendations based on your past usage patterns.
When this WOULD be correct
A company is planning a new workload and needs to estimate the monthly cost of running EC2 instances with specific configurations, including different instance types and regions, before deployment.
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.
✓AWS Cost ExplorerCorrect answer▾
Why this is correct
Correct. AWS Cost Explorer has a built-in tool that analyzes your historical EC2 (and other service) usage and provides recommendations for purchasing Reserved Instances and Savings Plans, including options with size flexibility to maximize savings.
✗AWS BudgetsWrong answer — click to see why▾
Why this is wrong here
AWS Budgets allows you to set cost and usage budgets and receive alerts, but it does not analyze historical EC2 usage or provide recommendations for Reserved Instances or Savings Plans.
★ When this WOULD be the correct answer
A company needs to set a cost budget for EC2 usage and receive alerts when spending exceeds a threshold. The finance team wants to monitor costs and get notified of overspending.
Why candidates choose this
Candidates may think AWS Budgets can provide cost-saving recommendations because it is a cost management tool, but its primary function is budgeting and alerts, not analysis and recommendations.
✗AWS Trusted AdvisorWrong answer — click to see why▾
Why this is wrong here
AWS Trusted Advisor provides general cost optimization checks and recommendations, but it does not offer detailed analysis of historical EC2 usage or specific recommendations for Reserved Instances and Savings Plans with instance size flexibility.
★ When this WOULD be the correct answer
A company wants a high-level review of their AWS account to identify cost optimization opportunities, security gaps, and performance improvements. The question would ask: 'Which AWS service provides best practice checks and recommendations across cost, performance, security, and fault tolerance?'
Why candidates choose this
Candidates may think Trusted Advisor is the go-to tool for cost recommendations because it includes cost optimization checks, but they overlook that it lacks the historical usage analysis and detailed purchase option recommendations that Cost Explorer provides.
✗AWS Pricing CalculatorWrong answer — click to see why▾
Why this is wrong here
AWS Pricing Calculator is used for estimating future costs based on user-defined inputs, not for analyzing historical usage or providing purchase recommendations.
★ When this WOULD be the correct answer
A company is planning a new workload and needs to estimate the monthly cost of running EC2 instances with specific configurations, including different instance types and regions, before deployment.
Why candidates choose this
Candidates may confuse the Pricing Calculator with a cost analysis tool because its name suggests it can provide cost-saving recommendations, but it lacks historical analysis and optimization features.
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?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse AWS Cost Explorer (an analysis and recommendation tool) with AWS Budgets (a cost tracking and alerting tool), or assume Trusted Advisor covers purchase recommendations when it only provides generic optimization checks.
Detailed technical explanation
How to think about this question
AWS Cost Explorer leverages the AWS Cost and Usage Report (CUR) to analyze granular historical data, then applies machine learning models to forecast future usage and recommend optimal RI/ Savings Plan combinations. Instance size flexibility in Savings Plans allows automatic application of discounts across different instance sizes within the same family (e.g., t3.large to t3.xlarge), which is critical for dynamic workloads. The tool also supports normalization factors (e.g., 1 t3.small = 0.5 normalized units) to ensure accurate cost comparisons across sizes.
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?
Billing, Pricing, and Support — This question tests Billing, Pricing, and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Cost Explorer — AWS Cost Explorer provides a comprehensive analysis of historical EC2 usage and generates tailored recommendations for both Reserved Instances (RI) and Savings Plans, including support for instance size flexibility. This directly meets the CFO's requirement to commit to a consistent usage level while optimizing costs based on actual usage patterns.
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.
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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