SCS-C02 Data Protection Practice Question
A company uses S3 to store sensitive customer data. Which AWS service can automatically discover and classify this data to help meet compliance requirements?
⚠ Common exam trap
SCS-C02 often tests the distinction between services that detect threats (GuardDuty) versus services that classify data content (Macie) — candidates frequently confuse GuardDuty's S3 protection with Macie's data classification role.
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 stored in Amazon S3. It specifically identifies PII, PHI, credentials, and other sensitive content, generating findings that support compliance requirements such as GDPR, HIPAA, and PCI-DSS. This is the exact purpose for which Macie was designed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Amazon GuardDuty
Why it's wrong here
Amazon GuardDuty is a continuous threat detection service that consumes AWS CloudTrail management events, VPC Flow Logs, and DNS query logs to identify unauthorized or malicious activity. It does not read the contents of S3 objects, so it cannot classify customer data or detect PII, credit card numbers, or other sensitive content. Therefore it is not the right service for discovering where sensitive data resides in S3.
- ✗
AWS Config
Why it's wrong here
AWS Config is a resource inventory and compliance service that records configuration state changes and evaluates AWS resources against custom or managed rules, such as detecting when an S3 bucket becomes publicly accessible. It tracks metadata and bucket-level configuration, not the data within objects, so it cannot identify or locate sensitive customer data inside S3 objects. Consequently, it is not a data-classification tool.
- ✗
Amazon CloudWatch
Why it's wrong here
Amazon CloudWatch aggregates and monitors operational metrics, logs, and events and can trigger alarms based on thresholds, but it has no built-in capability to inspect or classify the content of objects in Amazon S3. CloudWatch Logs might ingest application logs that contain snippets of data, yet it does not automatically scan stored files for sensitive data like PII. Thus, it is unsuitable for automated discovery and classification of sensitive customer data in S3.
- ✓
Amazon Macie
Why this is correct
Amazon Macie is purpose-built to discover, monitor, and classify sensitive data stored in Amazon S3 using machine learning and built-in managed data identifiers such as personally identifiable information (PII), financial data, and credentials. It automatically inventories buckets, evaluates object-level risk, and generates actionable findings/alerts when sensitive data is detected. This makes Macie the correct answer for automatically discovering and classifying sensitive customer data.
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 |
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Amazon Web Services exam blueprint
This SCS-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 SCS-C02 exam.