- A
Use 'Limited LOB mode' and set the maximum LOB size to a higher value.
Why wrong: Limited LOB mode truncates LOBs exceeding the max size.
- B
Enable 'Full LOB mode' in the DMS task settings.
Why wrong: Full LOB mode can cause performance issues but not inconsistency.
- C
Restart the DMS task after truncating the target tables.
Why wrong: Restarting does not fix data inconsistency.
- D
Configure the DMS task to use 'Full LOB mode' with parallel threads and enable 'BatchApply'.
This ensures all LOBs are migrated and applied efficiently.
Question 1,766 of 1,786
DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. 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 uses AWS DMS to migrate data from an on-premises Oracle database to Amazon RDS for PostgreSQL. The migration completes successfully, but the target database has inconsistent data. What should the team do to ensure data consistency?
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 the DMS task to use 'Full LOB mode' with parallel threads and enable 'BatchApply'.
Option D is correct because using 'Full LOB mode' ensures that large objects are migrated without truncation, parallel threads improve throughput, and 'BatchApply' applies changes in batches to maintain transactional consistency. Option A is incorrect because 'Limited LOB mode' can truncate LOB data if the size exceeds the configured maximum, leading to data loss. Option B is incorrect because merely enabling 'Full LOB mode' without parallel threads and 'BatchApply' may not handle large volumes efficiently, potentially causing inconsistency under heavy load. Option C is incorrect because truncating target tables and restarting the task is a destructive approach that does not resolve the underlying migration issues and can cause data loss or downtime.
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.
- ✗
Use 'Limited LOB mode' and set the maximum LOB size to a higher value.
Why it's wrong here
Limited LOB mode truncates LOBs exceeding the max size.
- ✗
Enable 'Full LOB mode' in the DMS task settings.
Why it's wrong here
Full LOB mode can cause performance issues but not inconsistency.
- ✗
Restart the DMS task after truncating the target tables.
Why it's wrong here
Restarting does not fix data inconsistency.
- ✓
Configure the DMS task to use 'Full LOB mode' with parallel threads and enable 'BatchApply'.
Why this is correct
This ensures all LOBs are migrated and applied efficiently.
Related concept
Standard ACLs match source addresses.
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.
Visual reference
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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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Operations and Support — This question tests Data Operations and Support — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Configure the DMS task to use 'Full LOB mode' with parallel threads and enable 'BatchApply'. — Option D is correct because using 'Full LOB mode' ensures that large objects are migrated without truncation, parallel threads improve throughput, and 'BatchApply' applies changes in batches to maintain transactional consistency. Option A is incorrect because 'Limited LOB mode' can truncate LOB data if the size exceeds the configured maximum, leading to data loss. Option B is incorrect because merely enabling 'Full LOB mode' without parallel threads and 'BatchApply' may not handle large volumes efficiently, potentially causing inconsistency under heavy load. Option C is incorrect because truncating target tables and restarting the task is a destructive approach that does not resolve the underlying migration issues and can cause data loss or downtime.
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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