- A
AWS Database Migration Service (AWS DMS)
DMS can continuously replicate from multiple source databases to S3.
- B
Amazon Kinesis Data Streams
Why wrong: Kinesis is for real-time data streams, not direct database replication.
- C
AWS Snowball
Why wrong: Snowball is for large physical data transfers, not continuous replication.
- D
AWS Glue
Why wrong: Glue is for batch ETL, not continuous replication.
Question 131 of 1,786
DMS Continuous Replication from Multiple On-Prem Databases
This DEA-C01 practice question tests your understanding of data ingestion and transformation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 needs to ingest data from multiple on-premises databases into Amazon S3 for analytics. The databases include Oracle, MySQL, and PostgreSQL. The data must be continuously replicated with minimal latency. Which AWS service should be used?
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
✓
AWS Database Migration Service (AWS DMS)
AWS DMS supports continuous replication (change data capture, CDC) from Oracle, MySQL, and PostgreSQL to S3 as a target, enabling near-real-time data ingestion with minimal latency. It handles schema conversion and can replicate ongoing changes without interrupting source databases, making it the correct choice for this use case.
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.
- ✓
AWS Database Migration Service (AWS DMS)
Why this is correct
DMS can continuously replicate from multiple source databases to S3.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Kinesis Data Streams
Why it's wrong here
Kinesis is for real-time data streams, not direct database replication.
- ✗
AWS Snowball
Why it's wrong here
Snowball is for large physical data transfers, not continuous replication.
- ✗
AWS Glue
Why it's wrong here
Glue is for batch ETL, not continuous replication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Kinesis Data Streams as a general-purpose ingestion service for databases, but it lacks native CDC connectors for relational databases and is optimized for streaming data from applications, not for replicating transactional changes from databases to S3.
Detailed technical explanation
How to think about this question
AWS DMS uses a replication instance to connect to source databases via native APIs (e.g., Oracle LogMiner or MySQL binlog) to capture changes in near real-time, then writes to S3 in formats like Parquet or CSV. A subtle behavior is that DMS CDC requires source databases to have binary logging enabled (e.g., MySQL binlog_format=ROW), and if the source logs are purged before DMS reads them, replication can fail, requiring careful log retention configuration.
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.
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Data Ingestion and Transformation — study guide chapter
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Database Migration Service (AWS DMS) — AWS DMS supports continuous replication (change data capture, CDC) from Oracle, MySQL, and PostgreSQL to S3 as a target, enabling near-real-time data ingestion with minimal latency. It handles schema conversion and can replicate ongoing changes without interrupting source databases, making it the correct choice for this use case.
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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Last reviewed: Jul 4, 2026
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.
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