- A
The Macie service-linked role does not have permissions to read the objects.
Why wrong: Macie automatically creates the necessary service-linked role with appropriate permissions.
- B
The S3 bucket is in a different AWS Region than the Macie job.
Why wrong: Macie can analyze buckets in any region where Macie is enabled.
- C
The S3 objects are encrypted with SSE-S3.
Why wrong: Macie can inspect objects encrypted with SSE-S3 because it has access to the plaintext via the service.
- D
The PII is in a format that Macie's managed data identifiers do not recognize, and no custom data identifier is configured.
Managed identifiers cover common patterns; custom identifiers are needed for proprietary or less common formats.
Question 323 of 1,748
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 security team uses Amazon Macie to discover sensitive data in S3. They have configured Macie to run automated sensitive data discovery jobs. After reviewing the findings, they notice that some S3 objects containing personally identifiable information (PII) are not being flagged. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The PII is in a format that Macie's managed data identifiers do not recognize, and no custom data identifier is configured.
Option D is correct because Macie uses managed data identifiers to detect PII based on predefined patterns. If the PII in the S3 objects is in a format that does not match any of these managed identifiers (e.g., a non-standard date format or a custom ID number), and no custom data identifier has been configured to recognize that specific pattern, Macie will not flag the objects. This is the most likely cause given that the security team has already configured automated discovery jobs and other common issues like permissions or encryption are not preventing scanning.
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.
- ✗
The Macie service-linked role does not have permissions to read the objects.
Why it's wrong here
Macie automatically creates the necessary service-linked role with appropriate permissions.
- ✗
The S3 bucket is in a different AWS Region than the Macie job.
Why it's wrong here
Macie can analyze buckets in any region where Macie is enabled.
- ✗
The S3 objects are encrypted with SSE-S3.
Why it's wrong here
Macie can inspect objects encrypted with SSE-S3 because it has access to the plaintext via the service.
- ✓
The PII is in a format that Macie's managed data identifiers do not recognize, and no custom data identifier is configured.
Why this is correct
Managed identifiers cover common patterns; custom identifiers are needed for proprietary or less common formats.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume encryption (SSE-S3) or cross-region issues block Macie, but Macie is designed to handle both seamlessly, and the real limitation is the scope of its pattern-matching identifiers.
Detailed technical explanation
How to think about this question
Macie's managed data identifiers are based on regular expressions and context checks defined by AWS for common PII types (e.g., US Social Security numbers, credit card numbers). When an object contains PII in a non-standard format—such as a driver's license number without the expected state prefix or a custom employee ID—Macie will not match it unless a custom data identifier is created using a user-defined regex and optional keywords. Under the hood, Macie samples objects (up to 1 MB per object) and applies pattern matching; if the pattern is absent, no finding is generated, even if the data is sensitive.
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 SCS-C02 question test?
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The PII is in a format that Macie's managed data identifiers do not recognize, and no custom data identifier is configured. — Option D is correct because Macie uses managed data identifiers to detect PII based on predefined patterns. If the PII in the S3 objects is in a format that does not match any of these managed identifiers (e.g., a non-standard date format or a custom ID number), and no custom data identifier has been configured to recognize that specific pattern, Macie will not flag the objects. This is the most likely cause given that the security team has already configured automated discovery jobs and other common issues like permissions or encryption are not preventing scanning.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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