- A
Amazon Macie
Amazon Macie is correct because it is designed to automatically discover, classify, and protect sensitive data in Amazon S3. It provides continuous monitoring and alerts for new sensitive data using machine learning.
- B
AWS Shield
Why wrong: AWS Shield provides managed DDoS protection for applications running on AWS. It does not discover or classify sensitive data in S3 buckets.
- C
Amazon Inspector
Why wrong: Amazon Inspector is a vulnerability management service that scans workloads for software vulnerabilities and unintended network exposure. It does not scan S3 bucket contents for sensitive data.
- D
AWS Config
Why wrong: AWS Config is a service that evaluates and records resource configurations against desired policies. It can check S3 bucket policies for public access but cannot scan object contents for PII.
Quick Answer
The answer is Amazon Macie. This service is the correct choice because it uses machine learning and pattern matching to automatically discover, classify, and protect sensitive data in S3 buckets, specifically identifying PII such as names, addresses, and credit card numbers. Macie also provides continuous monitoring and alerts when new sensitive data is uploaded, fulfilling both the discovery and ongoing compliance requirements. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of data security services and their specific use cases; a common trap is confusing Macie with AWS GuardDuty (which focuses on threat detection) or AWS Config (which tracks resource configuration). Remember that Macie is all about finding and watching sensitive data in S3, not about general security threats. A helpful memory tip: think of Macie as the "data detective" that reads your S3 files and flags anything personal.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. 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 stores customer data in Amazon S3 buckets. The compliance team needs to automatically discover which buckets contain personally identifiable information (PII) such as names, addresses, and credit card numbers. The team also wants to receive continuous monitoring and alerts when new sensitive data is uploaded. Which AWS service should the team use to meet these requirements?
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
Amazon Macie
Amazon Macie is a fully managed data security and data privacy service that uses machine learning and pattern matching to automatically discover, classify, and protect sensitive data in Amazon S3. It can identify PII such as names, addresses, and credit card numbers, and it provides continuous monitoring with alerts when new sensitive data is uploaded, meeting both the discovery and ongoing monitoring requirements.
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.
- ✓
Amazon Macie
Why this is correct
Amazon Macie is correct because it is designed to automatically discover, classify, and protect sensitive data in Amazon S3. It provides continuous monitoring and alerts for new sensitive data using machine learning.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Shield
Why it's wrong here
AWS Shield provides managed DDoS protection for applications running on AWS. It does not discover or classify sensitive data in S3 buckets.
- ✗
Amazon Inspector
Why it's wrong here
Amazon Inspector is a vulnerability management service that scans workloads for software vulnerabilities and unintended network exposure. It does not scan S3 bucket contents for sensitive data.
- ✗
AWS Config
Why it's wrong here
AWS Config is a service that evaluates and records resource configurations against desired policies. It can check S3 bucket policies for public access but cannot scan object contents for PII.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon Inspector (which scans for vulnerabilities) with Amazon Macie (which scans for sensitive data), because both involve 'scanning' but for entirely different purposes and resource types.
Detailed technical explanation
How to think about this question
Amazon Macie uses a combination of machine learning models and managed data identifiers (e.g., regex patterns for credit card numbers, US social security numbers) to classify sensitive data. It can also use custom data identifiers defined by the user. Macie generates findings that are sent to Amazon EventBridge and can be integrated with AWS Security Hub for centralized alerting, and it supports automated remediation via AWS Lambda. A real-world scenario is a healthcare organization that must comply with HIPAA and uses Macie to continuously monitor S3 for protected health information (PHI) and receive real-time alerts when new PHI is uploaded.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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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Security and Compliance — study guide chapter
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon Macie — Amazon Macie is a fully managed data security and data privacy service that uses machine learning and pattern matching to automatically discover, classify, and protect sensitive data in Amazon S3. It can identify PII such as names, addresses, and credit card numbers, and it provides continuous monitoring with alerts when new sensitive data is uploaded, meeting both the discovery and ongoing monitoring requirements.
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
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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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