The answer is to enable S3 Cross-Region Replication (CRR) on the source bucket. This configuration is correct because CRR automatically and asynchronously replicates objects from a source bucket in one AWS Region to a destination bucket in a different AWS Region, providing the geographic separation required for disaster recovery. Both buckets must have versioning enabled for CRR to function, and the replication is triggered immediately after each object upload. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of S3 replication mechanisms and their specific use cases; a common trap is confusing CRR with Same-Region Replication (SRR), which does not provide cross-region disaster recovery. Remember that CRR is for cross-region DR, while SRR is for compliance or log aggregation within the same region. A helpful memory tip: CRR stands for Cross-Region Recovery—think of the two Rs as “Region” and “Recovery” to keep the disaster recovery purpose front of mind.
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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 company is using Amazon S3 as a data lake. The data engineer needs to ensure that all objects uploaded to a specific bucket are automatically replicated to a bucket in another AWS Region for disaster recovery. Which configuration should the engineer implement?
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) on the source bucket.
S3 Cross-Region Replication (CRR) is the correct choice because it automatically replicates objects from a source bucket in one AWS Region to a destination bucket in a different AWS Region, meeting the disaster recovery requirement for geographic separation. CRR requires versioning to be enabled on both buckets and replicates new objects asynchronously after upload.
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.
✗
Enable S3 Same-Region Replication (SRR) on the source bucket.
Why it's wrong here
SRR replicates within the same region, not across regions.
✓
Enable S3 Cross-Region Replication (CRR) on the source bucket.
Why this is correct
CRR replicates objects across regions automatically.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use S3 Transfer Acceleration to copy objects to the destination.
Why it's wrong here
Transfer Acceleration speeds up uploads but does not provide continuous replication.
✗
Use S3 Batch Operations to copy existing objects.
Why it's wrong here
Batch Operations is for one-time bulk actions, not ongoing replication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse S3 Transfer Acceleration (which speeds up uploads) with replication, or assume S3 Batch Operations can be used for ongoing replication, when only CRR provides automatic, cross-region object replication for disaster recovery.
Detailed technical explanation
How to think about this question
CRR uses asynchronous replication where the source bucket sends PUT object events to a replication queue, and S3 replicates the object to the destination bucket based on the replication rules defined in the source bucket's configuration. Versioning must be enabled on both buckets, and replication can be filtered by prefix, tags, or object size; note that objects encrypted with AWS KMS (SSE-KMS) require additional KMS key permissions for the destination region. In a real-world scenario, if the source bucket has Lifecycle policies that expire objects, those expirations are not replicated, so the destination bucket may retain objects longer unless separate Lifecycle rules are configured.
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.
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.
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable S3 Cross-Region Replication (CRR) on the source bucket. — S3 Cross-Region Replication (CRR) is the correct choice because it automatically replicates objects from a source bucket in one AWS Region to a destination bucket in a different AWS Region, meeting the disaster recovery requirement for geographic separation. CRR requires versioning to be enabled on both buckets and replicates new objects asynchronously after upload.
What should I do if I get this DEA-C01 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.
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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.
Question Discussion
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