Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company uses AWS Organizations to manage multiple AWS accounts. The security team needs to ensure that no Amazon S3 bucket in any account within the organization can be made publicly accessible. The team wants a centrally managed, preventive control that applies to all existing and future accounts and cannot be overridden by individual account administrators. Which AWS feature should the security team use to meet these requirements?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
S3 Block Public Access account-level settings
Account-level S3 Block Public Access settings can be applied per account, but they are not centrally enforceable across all accounts in an organization with a single configuration. Individual account administrators could disable or modify these settings, so this does not meet the requirement for a central, non-overridable control.
B
Distractor review
AWS Config managed rule s3-bucket-public-read-prohibited
AWS Config rules are detective controls. They can evaluate bucket configurations and report noncompliant resources, but they do not prevent the action from occurring. The team wants a preventive control that prohibits making buckets public in the first place.
C
Distractor review
Amazon Macie with a sensitive data discovery job
Amazon Macie is a data security service that uses machine learning to discover, classify, and protect sensitive data in S3. It does not provide any mechanism to prevent buckets from being made publicly accessible; it focuses on data content rather than access control.
D
Best answer
Service control policy (SCP) in AWS Organizations
Service control policies (SCPs) are a feature of AWS Organizations. They allow centralized, preventive control over the maximum permissions granted to accounts within the organization. An SCP can deny actions that would make an S3 bucket public, such as s3:PutBucketAcl or s3:PutBucketPolicy. SCPs apply to all accounts (including future accounts) and cannot be overridden by account administrators, meeting all requirements.
Common exam trap
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Technical deep dive
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
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?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Standard ACLs match source addresses.
What is the correct answer to this question?
The correct answer is: Service control policy (SCP) in AWS Organizations — Service control policies (SCPs) in AWS Organizations provide centralized, preventive control over the maximum permissions for accounts. By creating an SCP that denies actions such as s3:PutBucketAcl or s3:PutBucketPolicy (which could make buckets public), the security team can enforce this restriction across all accounts in the organization, including future accounts. SCPs cannot be overridden by account administrators because they act as a guardrail at the organizational level.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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