DEA-C01 Data Security and Governance Practice Question

A data engineer needs to store sensitive data in Amazon S3 and automatically classify the data using a managed service. The data is uploaded via an S3 bucket. Which AWS service can automatically detect and classify sensitive data?

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 the correct answer because it is a fully managed data security and data privacy service that uses machine learning and pattern matching to discover, monitor, and protect sensitive data in Amazon S3. Option B, AWS WAF, is a web application firewall for protecting web applications, not for data classification. Option C, Amazon Inspector, is an automated vulnerability management service for EC2 instances and containers, not for S3 data classification. Option D, AWS Shield, is a managed DDoS protection service, unrelated to data classification.

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
Macie automatically discovers and classifies sensitive data.
✗
AWS WAF
Why it's wrong here
WAF filters web traffic.
✗
Amazon Inspector
Why it's wrong here
Inspector assesses EC2 vulnerabilities.
✗
AWS Shield
Why it's wrong here
Shield protects against DDoS attacks.

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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Last reviewed: Jun 20, 2026

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This DEA-C01 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 DEA-C01 exam.