DEA-C01 Data Operations and Support Practice Question
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'.
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.
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.
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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.