Question 495 of 988
CLF-C02 Billing, Pricing, and Support Practice Question
A company has a development environment running on Amazon EC2 instances. To control costs, the team wants to set a monthly budget of $5,000 for this environment. If the forecasted cost for the month exceeds $6,000 (20% over budget), they want AWS to automatically stop all non-critical EC2 instances to prevent further spending. Which AWS feature should the team use to implement this automated cost control?
⚠ Common exam trap
Watch out — candidates often confuse AWS Budgets (which can trigger actions) with AWS Cost Explorer (which only provides reporting) or AWS Cost Anomaly Detection (which only alerts), failing to recognize that only AWS Budgets with budget actions supports automated remediation.
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 Budgets with budget actions
AWS Budgets with budget actions allows you to set a monthly budget of $5,000 and define an action that triggers when the forecasted cost exceeds a specified threshold (e.g., 20% over budget, or $6,000). The action can automatically stop non-critical EC2 instances using an IAM role and a predefined runbook, directly enforcing cost control without manual intervention. This is the only AWS feature that combines budget monitoring with automated remediation actions.
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 tool for visualizing, understanding, and analyzing your costs and usage. It does not provide the ability to define automated actions when budget thresholds are exceeded. Therefore, it cannot automatically stop EC2 instances.
When this WOULD be correct
A question asking which AWS service allows a team to visualize historical cost trends, filter by tags, and create custom reports for cost analysis would make Cost Explorer the correct answer.
- ✓
AWS Budgets with budget actions
Why this is correct
AWS Budgets enables you to set custom budgets (e.g., monthly cost budget). With budget actions, you can configure automated responses when actual or forecasted costs exceed budget thresholds. For example, you can define an action to stop non-critical EC2 instances when the forecast exceeds $6,000. This fully meets the requirement.
- ✗
AWS Trusted Advisor
Why it's wrong here
AWS Trusted Advisor inspects your AWS environment and makes recommendations across categories including cost optimization. It can identify underutilized instances but does not execute automated actions (like stopping instances) based on budget thresholds. It is a recommendation engine, not an automation tool.
- ✗
AWS Cost Anomaly Detection
Why it's wrong here
AWS Cost Anomaly Detection uses machine learning to detect unusual spending patterns and sends alerts via email or Amazon SNS. It does not support automated remediation actions such as stopping EC2 instances. Its purpose is detection and notification, not automated response.
When this WOULD be correct
A company wants to be alerted when EC2 spending deviates from normal patterns by more than 20%, without setting a fixed budget, and requires automated root cause analysis.
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 Budgets with budget actionsCorrect answer▾
Why this is correct
AWS Budgets enables you to set custom budgets (e.g., monthly cost budget). With budget actions, you can configure automated responses when actual or forecasted costs exceed budget thresholds. For example, you can define an action to stop non-critical EC2 instances when the forecast exceeds $6,000. This fully meets the requirement.
✗AWS Cost ExplorerWrong answer — click to see why▾
Why this is wrong here
AWS Cost Explorer provides visualization and analysis of costs and usage but does not support automated actions like stopping EC2 instances based on budget thresholds.
★ When this WOULD be the correct answer
A question asking which AWS service allows a team to visualize historical cost trends, filter by tags, and create custom reports for cost analysis would make Cost Explorer the correct answer.
Why candidates choose this
Candidates may confuse Cost Explorer's cost monitoring capabilities with the ability to take automated actions, assuming that any cost-related tool can enforce budgets.
✗AWS Cost Anomaly DetectionWrong answer — click to see why▾
Why this is wrong here
AWS Cost Anomaly Detection detects unusual spending patterns but does not support automated actions to stop instances based on budget thresholds.
★ When this WOULD be the correct answer
A company wants to be alerted when EC2 spending deviates from normal patterns by more than 20%, without setting a fixed budget, and requires automated root cause analysis.
Why candidates choose this
Candidates may confuse anomaly detection with budget-based actions, thinking it can trigger automated responses when costs exceed expected patterns.
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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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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