CLF-C02 Billing, Pricing, and Support Practice Question
A company plans to migrate a three-tier web application to AWS. The application will run on Amazon EC2 instances, use an Amazon RDS database, and an Application Load Balancer. The CFO needs a detailed monthly cost estimate before migration. The solutions architect needs to model different instance types, storage sizes, and data transfer volumes, and then share the estimate with the finance team. Which AWS service should the solutions architect use to meet these requirements?
⚠ Common exam trap
Many candidates confuse AWS Cost Explorer (a historical analysis tool) with AWS Pricing Calculator (a future estimation tool), or assume AWS Budgets can generate cost estimates when it only monitors and alerts on actual spend against predefined budgets.
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 Pricing Calculator
AWS Pricing Calculator allows the solutions architect to model different EC2 instance types, RDS storage sizes, and data transfer volumes to generate a detailed monthly cost estimate. It provides granular control over pricing assumptions, including reserved vs. on-demand instances, and produces a shareable estimate link for the finance team. This makes it the correct tool for pre-migration cost modeling.
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 Pricing Calculator
Why this is correct
The AWS Pricing Calculator is the correct pre-migration tool because it lets you model a three-tier web application's services, specify resource configurations (e.g., EC2 instance types, RDS storage, ALB throughput), and compute a detailed monthly cost estimate. It supports side-by-side comparisons of architecture options and generates shareable estimate links for stakeholder review before any resources are launched, making it ideal for planning a migration.
- ✗
AWS Cost Explorer
Why it's wrong here
AWS Cost Explorer is incorrect because it is a post-usage analytics service that visualizes historical cost and usage data from already-deployed resources, with forecasting based on that past consumption. It cannot compute an upfront cost estimate for a not-yet-built three-tier architecture, as it has no data on unlaunched services and offers no mechanism to input hypothetical configurations for a planned migration.
When this WOULD be correct
A company has been running on AWS for several months and wants to visualize and analyze their past spending patterns to identify cost-saving opportunities or forecast future costs based on historical data.
- ✗
AWS Budgets
Why it's wrong here
AWS Budgets is incorrect because it is a monitoring and alerting service that tracks actual incurred spending against user-defined cost thresholds and sends notifications when those limits are exceeded. It does not generate itemized, configuration-level cost estimates for a proposed migration; rather, it is used after the application is live to prevent overspending, not to predict the cost of services before they exist.
When this WOULD be correct
A company wants to set a monthly cost limit for an existing AWS environment and receive alerts when spending approaches or exceeds the budget. The solutions architect needs to configure proactive notifications to avoid overspending.
- ✗
AWS Cost and Usage Report
Why it's wrong here
Incorrect. The AWS Cost and Usage Report contains the most detailed billing data, but it is generated after the resources have been used. It cannot produce estimates for resources that have not yet been launched.
When this WOULD be correct
A company needs to analyze historical AWS spending patterns and allocate costs by tags or accounts for chargeback reporting. The Cost and Usage Report would be used to generate a detailed CSV of past usage and costs.
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 Pricing CalculatorCorrect answer▾
Why this is correct
The AWS Pricing Calculator is the correct pre-migration tool because it lets you model a three-tier web application's services, specify resource configurations (e.g., EC2 instance types, RDS storage, ALB throughput), and compute a detailed monthly cost estimate. It supports side-by-side comparisons of architecture options and generates shareable estimate links for stakeholder review before any resources are launched, making it ideal for planning a migration.
✗AWS Cost ExplorerWrong answer — click to see why▾
Why this is wrong here
AWS Cost Explorer analyzes historical costs and usage, but cannot model future costs for different instance types, storage sizes, or data transfer volumes before migration.
★ When this WOULD be the correct answer
A company has been running on AWS for several months and wants to visualize and analyze their past spending patterns to identify cost-saving opportunities or forecast future costs based on historical data.
Why candidates choose this
Candidates may confuse Cost Explorer with a cost estimation tool because its name suggests exploring costs, and they might think it can be used for upfront cost modeling.
✗AWS BudgetsWrong answer — click to see why▾
Why this is wrong here
AWS Budgets is used to set cost thresholds and receive alerts, not to generate detailed cost estimates for different configurations before migration.
★ When this WOULD be the correct answer
A company wants to set a monthly cost limit for an existing AWS environment and receive alerts when spending approaches or exceeds the budget. The solutions architect needs to configure proactive notifications to avoid overspending.
Why candidates choose this
Candidates may confuse budgeting with cost estimation, thinking that AWS Budgets can provide cost projections for planned resources.
✗AWS Cost and Usage ReportWrong answer — click to see why▾
Why this is wrong here
AWS Cost and Usage Report provides detailed billing data after usage, not upfront cost estimates for modeling different configurations before migration.
★ When this WOULD be the correct answer
A company needs to analyze historical AWS spending patterns and allocate costs by tags or accounts for chargeback reporting. The Cost and Usage Report would be used to generate a detailed CSV of past usage and costs.
Why candidates choose this
Candidates may confuse detailed cost reporting with cost estimation, assuming that a report that tracks usage can also predict future costs.
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?”
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 |
Go deeper
Related to this question
About these practice questions
This CLF-C02 question is part of Courseiva's 988-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
Same concept, more angles
2 more ways this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is planning to migrate its on-premises database and web application to AWS. The solutions architect needs to provide a detailed monthly cost estimate for the AWS resources that will be used, including Amazon EC2 instances, Amazon RDS database instances, and Amazon S3 storage. The architect wants to specify instance types, storage sizes, data transfer amounts, and other parameters to get a precise estimate before building the environment. Which AWS tool should the architect use?
medium- A.AWS Cost Explorer
- B.AWS Budgets
- ✓ C.AWS Pricing Calculator
- D.AWS Total Cost of Ownership (TCO) Calculator
Why C: The AWS Pricing Calculator (formerly Simple Monthly Calculator) allows users to specify exact instance types, storage sizes, data transfer amounts, and other parameters for services like EC2, RDS, and S3 to generate a detailed monthly cost estimate before provisioning resources. This makes it the correct tool for the architect's requirement of a precise, pre-build cost estimate.
Variation 2. A company is planning to migrate a legacy application to AWS. The solutions architect needs to estimate the monthly cost of running Amazon EC2 instances, Amazon RDS databases, and Amazon S3 storage. The architect wants to compare different instance types, storage classes, and pricing models (e.g., On-Demand vs. Reserved Instances) to find the most cost-effective configuration. The team requires a tool that provides a detailed, itemized cost estimate without incurring any actual charges, and allows saving and sharing the estimate with stakeholders. Which AWS tool should the solutions architect use?
medium- A.AWS Budgets
- B.AWS Cost Explorer
- ✓ C.AWS Pricing Calculator
- D.AWS Cost and Usage Report
Why C: The AWS Pricing Calculator (formerly AWS Simple Monthly Calculator) is the correct tool because it allows users to build a detailed, itemized cost estimate for AWS services like EC2, RDS, and S3 without incurring any actual charges. It supports comparing different instance types, storage classes, and pricing models (On-Demand vs. Reserved Instances), and provides a shareable link to save and share the estimate with stakeholders.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.