DBS-C01 Deployment and Migration Practice Question
A company is migrating a 3 TB MySQL database to Amazon Aurora MySQL. They need to validate data consistency after migration. Which approach should they use?
⚠ Common exam trap
Watch out — candidates often assume row count comparison (Option A) is sufficient for data consistency, but the exam tests the understanding that only a row-level checksum comparison (like DMS validation) can guarantee data integrity in large-scale migrations.
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
✓
Use AWS DMS data validation feature.
AWS DMS data validation feature is the correct approach because it automatically compares source and target records by computing checksums at the table level, ensuring end-to-end consistency without manual intervention. For a 3 TB migration, this built-in feature handles large-scale validation efficiently by validating ongoing replication and full-load data, which is critical for MySQL to Aurora MySQL migrations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Compare row counts between source and target tables.
Why it's wrong here
Row count comparison does not verify data content.
- ✓
Use AWS DMS data validation feature.
Why this is correct
DMS data validation compares source and target data using table-level checksums.
- ✗
Run random SELECT queries on a subset of rows to compare values.
Why it's wrong here
Random sampling does not guarantee full data consistency.
- ✗
Compute MD5 checksums of the entire dataset in both databases.
Why it's wrong here
Computing checksums on large datasets is resource-intensive and impractical.
Go deeper
Related to this question
About these practice questions
This DBS-C01 question is part of Courseiva's 1,663-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-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 DBS-C01 exam.