- A
AWS Budgets with a budget action that stops EC2 instances when the threshold is exceeded
AWS Budgets supports budget actions that can automate responses to cost or usage threshold breaches. You can configure an action to stop Amazon EC2 instances, which directly satisfies the requirement without custom scripts.
- B
AWS Cost Explorer with a saved filter and manual instance termination
Why wrong: AWS Cost Explorer is a cost visualization and analysis tool. It cannot automatically stop instances; it only provides data for manual review. This does not meet the automation requirement.
- C
AWS Trusted Advisor cost optimization checks
Why wrong: AWS Trusted Advisor provides recommendations to reduce costs, such as identifying idle instances, but it does not execute automated actions like stopping instances. It only advises, not enforces.
- D
AWS Organizations Service Control Policies (SCPs)
Why wrong: Service Control Policies centrally control permissions for accounts in an organization. They can deny actions like launching EC2 instances but cannot automate stopping running instances based on cost thresholds. They are not designed for cost-based resource management.
Quick Answer
The answer is AWS Budgets with a budget action that stops EC2 instances when the cost threshold is exceeded. This is correct because AWS Budgets allows you to define a cost budget of $4,500 and attach a budget action that automatically triggers an EC2 stop action when the actual or forecasted cost reaches that limit, all without custom scripts or third-party tools. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of managed cost governance features versus manual or custom solutions; a common trap is choosing AWS Cost Explorer (which only visualizes costs) or AWS Lambda with custom code (which violates the “no custom scripts” requirement). Remember the key phrase: “budget action” is the bridge between a cost threshold and an automated EC2 stop. For the exam, think of it as “set a budget, attach an action, stop the instance”—no scripting needed.
CLF-C02 Billing, Pricing, and Support Practice Question
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 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?
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 that stops EC2 instances when the threshold is exceeded
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.
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 that stops EC2 instances when the threshold is exceeded
Why this is correct
AWS Budgets supports budget actions that can automate responses to cost or usage threshold breaches. You can configure an action to stop Amazon EC2 instances, which directly satisfies the requirement without custom scripts.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Cost Explorer with a saved filter and manual instance termination
Why it's wrong here
AWS Cost Explorer is a cost visualization and analysis tool. It cannot automatically stop instances; it only provides data for manual review. This does not meet the automation requirement.
- ✗
AWS Trusted Advisor cost optimization checks
Why it's wrong here
AWS Trusted Advisor provides recommendations to reduce costs, such as identifying idle instances, but it does not execute automated actions like stopping instances. It only advises, not enforces.
- ✗
AWS Organizations Service Control Policies (SCPs)
Why it's wrong here
Service Control Policies centrally control permissions for accounts in an organization. They can deny actions like launching EC2 instances but cannot automate stopping running instances based on cost thresholds. They are not designed for cost-based resource management.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse AWS Cost Explorer's visualization capabilities with automated cost control actions, or mistakenly think Trusted Advisor can enforce cost limits, when only AWS Budgets with budget actions provides native, automated instance stopping based on cost thresholds.
Detailed technical explanation
How to think about this question
AWS Budgets budget actions use AWS Identity and Access Management (IAM) roles and AWS Systems Manager Automation runbooks (e.g., AWS-StopEC2Instance) to perform the stop action on EC2 instances when the budget threshold is breached. The action can be applied to specific EC2 instances or all instances in a region, and it supports both actual and forecasted cost triggers, ensuring proactive cost control before the monthly budget is exhausted.
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.
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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 that stops EC2 instances when the threshold is exceeded — 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.
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 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 2. 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.
Variation 3. 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?
medium- ✓ A.AWS Budgets with a budget action to stop EC2 instances
- B.AWS Cost Explorer
- C.AWS Trusted Advisor
- D.AWS Config
Why A: 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.
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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