CLF-C02 Billing, Pricing, and Support Practice Question
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?
⚠ Common exam trap
Many exam-takers confuse the AWS Pricing Calculator (for future estimates) with AWS Cost Explorer (for past analysis) or the TCO Calculator (for on-premises comparison), leading them to select a tool that cannot generate a forward-looking cost estimate for a planned workload.
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
The AWS Pricing Calculator (formerly Simple Monthly Calculator) is the correct tool for estimating monthly costs for specific AWS resources like EC2 instances, ALB, and RDS under different purchasing options (On-Demand, Reserved Instances, Savings Plans). It allows you to input exact instance types, quantities, and commitment terms to generate a detailed cost estimate for the first year.
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 Total Cost of Ownership (TCO) Calculator
Why it's wrong here
The TCO Calculator is designed to compare on-premises infrastructure costs with AWS costs. It is not intended to estimate costs for a new AWS-only deployment with specific pricing options like Reserved Instances or Savings Plans.
When this WOULD be correct
A question asking to compare the total cost of ownership between running a workload on-premises versus migrating it to AWS, including hardware, software, labor, and facilities costs.
- ✓
AWS Pricing Calculator
Why this is correct
The AWS Pricing Calculator is a web-based tool for building a cost estimate for a new AWS workload before any resources are provisioned. You can select services, configure compute, storage, and data transfer parameters, and choose purchasing options like On-Demand, Reserved Instances, or Savings Plans to see a line-item monthly and annual estimate. It directly addresses the scenario of planning a new web application with no existing usage data.
- ✗
AWS Cost Explorer
Why it's wrong here
AWS Cost Explorer analyzes historical cost and usage data, with interactive charts for filtering by service, region, or tag to identify billing trends. Its forecasting features extrapolate from past usage, so they are meaningless for a workload that has never been deployed; there are no configuration inputs for CPUs, storage sizes, or pricing plans. Therefore, it is a post-launch analysis tool, not a pre-deployment pricing estimator.
When this WOULD be correct
A solutions architect needs to review the cost trends of existing EC2 instances over the past 6 months to identify underutilized resources. AWS Cost Explorer would be the correct tool for this historical analysis.
- ✗
AWS Budgets
Why it's wrong here
AWS Budgets is a cost governance service that tracks actual and forecasted spend against the thresholds you define, sending alerts or triggering actions when limits are exceeded. It only works with resources that already exist in your account and have generated cost data, so it cannot model a not-yet-built architecture or compare pricing options. Using it to estimate a new deployment would be impossible because there is no billing history to evaluate.
When this WOULD be correct
A solutions architect needs to set a monthly cost threshold for a new deployment and receive notifications if costs exceed that limit; AWS Budgets would be the correct tool to configure those alerts.
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 a web-based tool for building a cost estimate for a new AWS workload before any resources are provisioned. You can select services, configure compute, storage, and data transfer parameters, and choose purchasing options like On-Demand, Reserved Instances, or Savings Plans to see a line-item monthly and annual estimate. It directly addresses the scenario of planning a new web application with no existing usage data.
✗AWS Total Cost of Ownership (TCO) CalculatorWrong answer — click to see why▾
Why this is wrong here
The TCO Calculator compares on-premises vs. AWS costs, not estimating monthly costs for a new AWS-only workload with different purchasing options.
★ When this WOULD be the correct answer
A question asking to compare the total cost of ownership between running a workload on-premises versus migrating it to AWS, including hardware, software, labor, and facilities costs.
Why candidates choose this
Candidates may confuse 'cost estimation' with 'total cost of ownership' and think TCO Calculator can estimate AWS service costs, but it's designed for migration comparisons.
✗AWS Cost ExplorerWrong answer — click to see why▾
Why this is wrong here
AWS Cost Explorer is used for analyzing historical costs and usage, not for creating upfront cost estimates for new workloads with different purchasing options.
★ When this WOULD be the correct answer
A solutions architect needs to review the cost trends of existing EC2 instances over the past 6 months to identify underutilized resources. AWS Cost Explorer would be the correct tool for this historical analysis.
Why candidates choose this
Candidates may confuse Cost Explorer's cost analysis capabilities with cost estimation, assuming it can also forecast future costs for new deployments.
✗AWS BudgetsWrong answer — click to see why▾
Why this is wrong here
AWS Budgets is used to set spending limits and receive alerts, not to create cost estimates for specific resource configurations.
★ When this WOULD be the correct answer
A solutions architect needs to set a monthly cost threshold for a new deployment and receive notifications if costs exceed that limit; AWS Budgets would be the correct tool to configure those alerts.
Why candidates choose this
Candidates may confuse cost estimation with cost monitoring, thinking Budgets can provide upfront pricing estimates because it deals with cost tracking.
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?”
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Same concept, more angles
1 more way 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 startup is designing a new application on AWS. They have selected specific Amazon EC2 instance types, Amazon EBS volumes, and estimated data transfer. The team wants to compare the monthly cost of running the application using On-Demand instances versus 1-year All Upfront Reserved Instances before they commit to any resources. Which AWS tool should they use to generate this cost estimate?
medium- A.AWS Cost Explorer
- B.AWS Budgets
- ✓ C.AWS Pricing Calculator
- D.AWS Trusted Advisor
Why C: AWS Pricing Calculator (option C) is the correct tool because it allows users to estimate the monthly cost of AWS services, including EC2 instances, EBS volumes, and data transfer, before deployment. It supports comparing pricing models such as On-Demand and 1-year All Upfront Reserved Instances by letting you input specific instance types, storage, and transfer details to generate a detailed cost breakdown. This matches the startup's need to compare costs without committing to resources.
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.