The answer is to test the application thoroughly against the target database. This step is critical because when migrating an Oracle database with custom PL/SQL packages and triggers to Amazon Aurora MySQL, AWS Schema Conversion Tool (SCT) will convert the code, but the logic may not translate perfectly due to syntactic and functional differences between Oracle and MySQL dialects. AWS DMS handles the 2 TB data load with ongoing replication to minimize downtime, but only rigorous application testing validates that the converted triggers and packages behave identically, ensuring minimal application changes. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that schema conversion is not a “set and forget” process—candidates often mistakenly focus solely on DMS replication settings or SCT conversion success, overlooking the validation phase. A common trap is assuming that a successful SCT conversion report guarantees application compatibility. Remember the mnemonic “Test Before You Trust” to emphasize that thorough testing is the non-negotiable final step in any heterogeneous migration.
DBS-C01 Workload-Specific Database Design Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. 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 is migrating a 2 TB Oracle database to Amazon Aurora MySQL. The database has custom PL/SQL packages and triggers. The migration must be completed with minimal application changes. Which THREE steps should the company take? (Choose three.)
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 to perform live migration with ongoing replication.
AWS DMS supports live migration with ongoing replication, which is essential for migrating a 2 TB Oracle database to Amazon Aurora MySQL with minimal downtime. It can handle continuous changes from the source while the target is being loaded, ensuring near-zero application disruption.
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.
✓
Use AWS DMS to perform live migration with ongoing replication.
Why this is correct
DMS minimizes downtime.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use AWS Schema Conversion Tool (SCT) to convert the schema and code.
Why this is correct
SCT converts PL/SQL to MySQL syntax.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon S3 to store and transfer database dump files.
Why it's wrong here
Not necessary for migration.
✗
Manually rewrite all PL/SQL packages to MySQL syntax.
Why it's wrong here
SCT automates conversion.
✓
Test the application thoroughly against the target database.
Why this is correct
Ensures compatibility.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume manual rewriting is required for all PL/SQL code, overlooking that SCT automates most of the conversion, or they may choose S3-based dump transfer as a simpler option without considering the need for minimal downtime and ongoing replication.
Detailed technical explanation
How to think about this question
AWS DMS uses a change data capture (CDC) mechanism to replicate ongoing transactions from Oracle (via LogMiner or binary logs) to Aurora MySQL, maintaining data consistency during migration. The SCT performs syntax-level conversion of PL/SQL to MySQL stored procedures and functions, but may require post-conversion tweaks for Oracle-specific features like pipelined table functions or advanced queuing.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS DMS to perform live migration with ongoing replication. — AWS DMS supports live migration with ongoing replication, which is essential for migrating a 2 TB Oracle database to Amazon Aurora MySQL with minimal downtime. It can handle continuous changes from the source while the target is being loaded, ensuring near-zero application disruption.
What should I do if I get this DBS-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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Question Discussion
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