- A
Configure a DMS task with a transformation rule to convert to Parquet.
Correct. A transformation rule in the DMS task converts the data to Parquet format during migration.
- B
Specify an S3 bucket as the target endpoint with data format set to Parquet.
Correct. The S3 target endpoint must be configured with Parquet as the data format to store the output correctly.
- C
Use AWS Schema Conversion Tool (SCT) to convert the schema.
Why wrong: Incorrect. AWS SCT is used for schema conversion between different database engines, not for configuring DMS replication tasks.
- D
Enable change data capture (CDC) on the source database.
Correct. Enabling CDC on the source Oracle database allows DMS to capture ongoing changes for continuous replication.
- E
Perform a full load only, without CDC.
Why wrong: Incorrect. A full load only migrates existing data once and does not capture ongoing changes, so it does not meet the requirement for continuous replication with minimal latency.
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. 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 data engineer is designing a data ingestion pipeline that uses AWS DMS to migrate data from an on-premises Oracle database to Amazon S3 in Parquet format. The engineer needs to ensure that data is continuously replicated with minimal latency. Which THREE steps should the engineer take? (Choose three.)
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
Configure a DMS task with a transformation rule to convert to Parquet.
Options A, B, and D are correct. To continuously replicate data with minimal latency from Oracle to Amazon S3 in Parquet format, the engineer should: (A) configure a DMS task with a transformation rule to convert to Parquet, (B) specify an S3 bucket as the target endpoint with data format set to Parquet, and (D) enable change data capture (CDC) on the source database. Option C (using AWS SCT) is incorrect because SCT is for schema conversion, not for DMS replication. Option E (full load only) is incorrect because it does not provide continuous replication.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure a DMS task with a transformation rule to convert to Parquet.
Why this is correct
Correct. A transformation rule in the DMS task converts the data to Parquet format during migration.
Related concept
Standard ACLs match source addresses.
- ✓
Specify an S3 bucket as the target endpoint with data format set to Parquet.
Why this is correct
Correct. The S3 target endpoint must be configured with Parquet as the data format to store the output correctly.
Related concept
Standard ACLs match source addresses.
- ✗
Use AWS Schema Conversion Tool (SCT) to convert the schema.
Why it's wrong here
Incorrect. AWS SCT is used for schema conversion between different database engines, not for configuring DMS replication tasks.
- ✓
Enable change data capture (CDC) on the source database.
Why this is correct
Correct. Enabling CDC on the source Oracle database allows DMS to capture ongoing changes for continuous replication.
Related concept
Standard ACLs match source addresses.
- ✗
Perform a full load only, without CDC.
Why it's wrong here
Incorrect. A full load only migrates existing data once and does not capture ongoing changes, so it does not meet the requirement for continuous replication with minimal latency.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DEA-C01 ACL questions on filtering logic and placement.
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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 — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Configure a DMS task with a transformation rule to convert to Parquet. — Options A, B, and D are correct. To continuously replicate data with minimal latency from Oracle to Amazon S3 in Parquet format, the engineer should: (A) configure a DMS task with a transformation rule to convert to Parquet, (B) specify an S3 bucket as the target endpoint with data format set to Parquet, and (D) enable change data capture (CDC) on the source database. Option C (using AWS SCT) is incorrect because SCT is for schema conversion, not for DMS replication. Option E (full load only) is incorrect because it does not provide continuous replication.
What should I do if I get this DEA-C01 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DEA-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
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