CLF-C02 Billing, Pricing, and Support Practice Question
A solutions architect is designing a new architecture on AWS that includes EC2, RDS, S3, and data transfer. Before deploying anything, they want to estimate the monthly cost of running this architecture. Which AWS tool should they use?
⚠ Common exam trap
Many candidates confuse AWS Cost Explorer (a historical analysis tool) with the Pricing Calculator (a pre-deployment estimation tool), leading them to pick A instead of C.
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 is the correct tool because it allows you to estimate the monthly cost of AWS services before deployment by specifying resource configurations (e.g., EC2 instance type, RDS storage, S3 data transfer). Unlike Cost Explorer, which analyzes historical costs, the Pricing Calculator provides upfront cost projections for new architectures.
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 Cost Explorer
Why it's wrong here
AWS Cost Explorer is a spending analysis service that ingests actual billing data from resources you have already deployed. It allows you to visualize historical usage and costs, group by service or tag, and create forecasts, but those forecasts are simply extrapolations of your past spending patterns. It cannot incorporate a proposed architecture, new instance types, or other planned configurations that have no usage history, so it is unsuitable for generating a pre-deployment estimate.
- ✗
AWS Budgets
Why it's wrong here
AWS Budgets is a cost governance service that lets you monitor actual and forecasted spend against thresholds you define, such as a monthly cost limit or a usage target. It does not calculate what a proposed architecture will cost; you must already know a budget number or have historical usage data to set an alert. The service reacts to spend as it occurs or is projected, so it cannot serve as a pre-deployment pricing estimator for a solution you have not yet built.
- ✓
AWS Pricing Calculator
Why this is correct
AWS Pricing Calculator is the correct pre-deployment tool for estimating monthly AWS costs. It allows you to interactively configure services—such as EC2 instance type, storage size, data transfer, and region—and generates an itemized monthly estimate for a complete architecture. You can save, share, and compare multiple estimates before committing any resources, making it the only option here that answers "how much will this cost?" before you deploy.
- ✗
AWS Trusted Advisor
Why it's wrong here
AWS Trusted Advisor is an advisory service that inspects your existing AWS account resources against best practices for cost optimization, security, performance, and fault tolerance. Its cost-related checks identify underused or idle resources you are already paying for, such as unattached Elastic IP addresses or low-utilization EC2 instances. Because it requires live resources to analyze, it has no capability to model a hypothetical, not-yet-deployed architecture or calculate its estimated cost.
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 |
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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.