- 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.
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.
When this WOULD be correct
A company wants to protect its web applications from DDoS attacks and needs a managed service that provides always-on detection and automatic mitigations. AWS Shield (Standard or Advanced) would be the correct choice.
- ✗
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.
When this WOULD be correct
A company needs to automatically assess EC2 instances for common vulnerabilities and exposures (CVEs) and network misconfigurations, and receive findings and alerts. Amazon Inspector would be the correct service.
- ✗
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.
When this WOULD be correct
AWS Config would be correct if the question asked for tracking changes to S3 bucket policies or ensuring buckets are not publicly accessible, with alerts on configuration drift.
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.
✓Amazon MacieCorrect answer▾
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.
✗AWS ShieldWrong answer — click to see why▾
Why this is wrong here
AWS Shield is a managed DDoS protection service, not designed for data classification or PII discovery in S3 buckets.
★ When this WOULD be the correct answer
A company wants to protect its web applications from DDoS attacks and needs a managed service that provides always-on detection and automatic mitigations. AWS Shield (Standard or Advanced) would be the correct choice.
Why candidates choose this
Candidates may confuse 'protection' with 'data protection' and assume Shield covers sensitive data, or they may not be familiar with Macie's specific capabilities.
✗Amazon InspectorWrong answer — click to see why▾
Why this is wrong here
Amazon Inspector is a vulnerability management service that scans workloads for software vulnerabilities and unintended network exposure, not for discovering PII in S3 buckets.
★ When this WOULD be the correct answer
A company needs to automatically assess EC2 instances for common vulnerabilities and exposures (CVEs) and network misconfigurations, and receive findings and alerts. Amazon Inspector would be the correct service.
Why candidates choose this
Candidates may confuse 'inspecting' for sensitive data with vulnerability scanning, or think Inspector covers all types of data inspection due to its name.
✗AWS ConfigWrong answer — click to see why▾
Why this is wrong here
AWS Config is used to evaluate and record configuration changes of AWS resources, not to discover or monitor PII in S3 objects. It cannot inspect object content for sensitive data.
★ When this WOULD be the correct answer
AWS Config would be correct if the question asked for tracking changes to S3 bucket policies or ensuring buckets are not publicly accessible, with alerts on configuration drift.
Why candidates choose this
Candidates may confuse AWS Config's monitoring and alerting capabilities with data content inspection, thinking it can identify PII because it can monitor resource configurations.
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 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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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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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
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 →
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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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