- A
AWS Budgets with a budget action to stop EC2 instances
Correct. AWS Budgets supports budget actions that can automatically stop EC2 instances when actual or forecasted costs exceed the budget threshold, eliminating the need for custom scripts.
- B
AWS Cost Explorer
Why wrong: Incorrect. AWS Cost Explorer is a tool for analyzing historical cost data and forecasting future spend, but it does not have the ability to take automated actions like stopping resources.
- C
AWS Trusted Advisor
Why wrong: Incorrect. AWS Trusted Advisor provides best-practice recommendations, including cost optimization checks, but it does not allow you to define actions that automatically stop resources based on cost thresholds.
- D
AWS Config
Why wrong: Incorrect. AWS Config is a service for evaluating resource configurations against compliance rules (e.g., ensuring security group rules are correct). It does not monitor cost or trigger actions based on spending.
AWS Budgets Budget Action to Automatically Stop EC2 Instances
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 non-production Amazon EC2 instances for development and testing. The finance team wants to automatically stop all non-production instances if the monthly spending exceeds $5,000. The team wants to set this up without writing custom scripts or using third-party tools. Which AWS feature should the finance team use to meet this requirement?
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 a budget action to stop EC2 instances
AWS Budgets allows you to set a cost budget (e.g., $5,000) and attach a budget action that triggers an AWS Systems Manager (SSM) automation document to stop EC2 instances when the actual or forecasted spend exceeds the threshold. This meets the requirement without custom scripts or third-party tools, as the budget action natively integrates with EC2 via SSM.
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 with a budget action to stop EC2 instances
Why this is correct
Correct. AWS Budgets supports budget actions that can automatically stop EC2 instances when actual or forecasted costs exceed the budget threshold, eliminating the need for custom scripts.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Cost Explorer
Why it's wrong here
Incorrect. AWS Cost Explorer is a tool for analyzing historical cost data and forecasting future spend, but it does not have the ability to take automated actions like stopping resources.
When this WOULD be correct
A company wants to analyze historical cost trends and forecast future spending to identify cost-saving opportunities, without needing automated actions.
- ✗
AWS Trusted Advisor
Why it's wrong here
Incorrect. AWS Trusted Advisor provides best-practice recommendations, including cost optimization checks, but it does not allow you to define actions that automatically stop resources based on cost thresholds.
When this WOULD be correct
A company wants to identify underutilized EC2 instances that could be stopped to reduce costs, and needs a service that provides best-practice recommendations without automation. AWS Trusted Advisor would be the correct answer.
- ✗
AWS Config
Why it's wrong here
Incorrect. AWS Config is a service for evaluating resource configurations against compliance rules (e.g., ensuring security group rules are correct). It does not monitor cost or trigger actions based on spending.
When this WOULD be correct
A company needs to automatically remediate non-compliant EC2 instances (e.g., those without required tags) by stopping them. AWS Config rules with auto-remediation actions would be the correct choice.
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 a budget action to stop EC2 instancesCorrect answer▾
Why this is correct
Correct. AWS Budgets supports budget actions that can automatically stop EC2 instances when actual or forecasted costs exceed the budget threshold, eliminating the need for custom scripts.
✗AWS Cost ExplorerWrong answer — click to see why▾
Why this is wrong here
AWS Cost Explorer provides cost visualization and analysis but cannot automatically take actions like stopping EC2 instances based on spending thresholds.
★ When this WOULD be the correct answer
A company wants to analyze historical cost trends and forecast future spending to identify cost-saving opportunities, without needing automated actions.
Why candidates choose this
Candidates may confuse cost analysis tools with cost management actions, assuming Cost Explorer can trigger automated responses.
✗AWS Trusted AdvisorWrong answer — click to see why▾
Why this is wrong here
AWS Trusted Advisor provides cost optimization recommendations but cannot automatically stop EC2 instances based on spending thresholds; it lacks native budget action capabilities.
★ When this WOULD be the correct answer
A company wants to identify underutilized EC2 instances that could be stopped to reduce costs, and needs a service that provides best-practice recommendations without automation. AWS Trusted Advisor would be the correct answer.
Why candidates choose this
Candidates may confuse Trusted Advisor's cost optimization checks with the ability to enforce actions, assuming it can automatically stop instances based on cost thresholds.
✗AWS ConfigWrong answer — click to see why▾
Why this is wrong here
AWS Config is a service for resource inventory, configuration history, and compliance auditing, not for cost-based automated actions. It cannot directly stop EC2 instances based on spending thresholds.
★ When this WOULD be the correct answer
A company needs to automatically remediate non-compliant EC2 instances (e.g., those without required tags) by stopping them. AWS Config rules with auto-remediation actions would be the correct choice.
Why candidates choose this
Candidates may confuse AWS Config's ability to trigger actions (via AWS Config rules and Systems Manager Automation) with budget-based automation, overlooking that AWS Config does not natively monitor cost metrics.
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 Budgets (a cost management tool) with AWS Config (a compliance tool) or Trusted Advisor (a recommendation engine), assuming those can enforce actions, but only Budgets with budget actions provides the automated, threshold-based stop capability without custom code.
Detailed technical explanation
How to think about this question
Under the hood, AWS Budgets budget actions use AWS Systems Manager Automation runbooks (e.g., AWS-StopEC2Instance) to perform the stop operation. The action can be set to trigger on actual or forecasted spend, and it respects IAM permissions via a service-linked role (AWSServiceRoleForBudgetsAction). A real-world nuance: if instances are part of an Auto Scaling group, stopping them individually may cause the group to relaunch them, so the budget action should target the ASG's desired capacity or use a custom SSM document to suspend processes.
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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Billing, Pricing, and Support — study guide chapter
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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 Budgets with a budget action to stop EC2 instances — AWS Budgets allows you to set a cost budget (e.g., $5,000) and attach a budget action that triggers an AWS Systems Manager (SSM) automation document to stop EC2 instances when the actual or forecasted spend exceeds the threshold. This meets the requirement without custom scripts or third-party tools, as the budget action natively integrates with EC2 via SSM.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
3 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 runs a development environment composed of multiple Amazon EC2 instances. The finance team has set a monthly budget of $5,000 for this environment and wants to automatically stop all EC2 instances if the accumulated cost reaches $4,500 before the end of the month. The team needs a managed AWS-native solution that does not require custom scripts or third-party tools. Which AWS feature or service should the company use to meet this requirement?
medium- ✓ A.AWS Budgets with a budget action that stops EC2 instances when the threshold is exceeded
- B.AWS Cost Explorer with a saved filter and manual instance termination
- C.AWS Trusted Advisor cost optimization checks
- D.AWS Organizations Service Control Policies (SCPs)
Why A: AWS Budgets allows you to set a cost budget with an associated budget action that can automatically stop EC2 instances when the actual or forecasted cost exceeds a specified threshold (e.g., $4,500). This is a fully managed, native AWS solution that requires no custom scripts or third-party tools, directly meeting the requirement to stop instances automatically based on cost.
Variation 2. 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?
medium- A.AWS Cost Explorer
- ✓ B.AWS Budgets with budget actions
- C.AWS Trusted Advisor
- D.AWS Cost Anomaly Detection
Why B: 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.
Variation 3. A company runs development and test environments on Amazon EC2 instances in separate AWS accounts. The finance team wants to automatically stop all non-production EC2 instances if the monthly development account costs exceed $1,000. The team needs a solution that requires no manual intervention and uses only AWS-native features. Which AWS feature should the team configure to meet these requirements?
medium- A.AWS Cost Explorer with a cost allocation tag filter
- ✓ B.AWS Budgets with a cost action
- C.AWS Trusted Advisor with the cost optimization check
- D.Amazon CloudWatch with a billing metric alarm
Why B: AWS Budgets allows you to set a cost budget with a cost action that automatically stops EC2 instances when the threshold is exceeded. This meets the requirement for no manual intervention and uses only AWS-native features, as the cost action can be configured to trigger an IAM policy or a service control policy (SCP) to stop instances in the development account.
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Last reviewed: Jun 11, 2026
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