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 an on-premises Oracle database to Amazon Aurora PostgreSQL. The database is used for a financial application that requires complex joins and transactions. Which migration strategy is MOST appropriate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS SCT to convert the schema and AWS DMS to migrate data
Option C is correct because AWS Schema Conversion Tool (SCT) is required to convert the Oracle schema (including complex joins and transaction logic) to a PostgreSQL-compatible format, and AWS Database Migration Service (DMS) performs the ongoing data migration with minimal downtime. This combination handles both schema transformation and data replication for heterogeneous migrations, which is essential for a financial application with complex joins and transactions.
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 with native Oracle to PostgreSQL endpoint
Why it's wrong here
DMS can migrate data but schema conversion requires SCT.
✗
Use Oracle GoldenGate to replicate data to Aurora PostgreSQL
Why it's wrong here
GoldenGate supports Oracle to Oracle replication; not straightforward for Aurora.
✓
Use AWS SCT to convert the schema and AWS DMS to migrate data
Why this is correct
SCT converts schema, DMS migrates data.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use pg_dump to export the Oracle database and restore to Aurora PostgreSQL
Why it's wrong here
pg_dump is for PostgreSQL, not Oracle.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume DMS alone can handle heterogeneous migrations without schema conversion, or that a PostgreSQL-native tool like pg_dump can extract data from Oracle, leading them to choose options A or D instead of recognizing the mandatory role of SCT.
Detailed technical explanation
How to think about this question
AWS SCT generates a conversion report and applies transformations for Oracle-specific features like PL/SQL packages, sequences, and partitioned tables into PostgreSQL-compatible constructs (e.g., PL/pgSQL, sequences, and table partitioning). DMS then uses change data capture (CDC) via Oracle LogMiner or binary logs to replicate ongoing transactions, ensuring minimal downtime for the financial application. In practice, complex joins and transaction isolation levels (e.g., Oracle's SERIALIZABLE vs. PostgreSQL's REPEATABLE READ) may require manual adjustment in the converted schema.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 SCT to convert the schema and AWS DMS to migrate data — Option C is correct because AWS Schema Conversion Tool (SCT) is required to convert the Oracle schema (including complex joins and transaction logic) to a PostgreSQL-compatible format, and AWS Database Migration Service (DMS) performs the ongoing data migration with minimal downtime. This combination handles both schema transformation and data replication for heterogeneous migrations, which is essential for a financial application with complex joins and transactions.
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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