DEA-C01 Data Operations and Support Practice Question
A data engineer is tasked with designing a disaster recovery solution for a data lake stored in Amazon S3. The data lake contains sensitive customer data that must be replicated to a different AWS Region. The engineer needs to ensure that all objects, including those with encryption using SSE-KMS, are replicated. Which solution meets the 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
✓
Enable S3 Cross-Region Replication (CRR) with the appropriate KMS key and IAM role.
S3 Cross-Region Replication (CRR) can replicate objects encrypted with SSE-KMS if the appropriate KMS key is configured and the IAM role has the necessary permissions for encryption operations. Option A (S3 Batch Operations) is designed for one-time bulk actions, not ongoing replication. Option C (S3 Transfer Acceleration) only speeds up data transfer but does not provide replication. Option D (AWS CLI s3 sync) is a manual, scheduled copy process and does not offer automatic, continuous replication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use S3 Batch Operations to copy objects to the destination bucket.
Why it's wrong here
Batch Operations is not a continuous replication solution.
- ✓
Enable S3 Cross-Region Replication (CRR) with the appropriate KMS key and IAM role.
Why this is correct
CRR supports SSE-KMS with proper configuration.
- ✗
Use S3 Transfer Acceleration to copy objects across regions.
Why it's wrong here
Transfer Acceleration does not replicate.
- ✗
Use the AWS CLI s3 sync command scheduled in a cron job.
Why it's wrong here
This is not automatic and may miss changes.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.