- A
Set up AWS DMS ongoing replication to keep the target in sync after migration.
Why wrong: Ongoing replication is for minimal downtime migrations, but not a required step for all migrations.
- B
Use AWS Schema Conversion Tool (SCT) to convert the Oracle schema and stored procedures to PostgreSQL-compatible format.
SCT converts schema and code objects like stored procedures.
- C
Configure AWS DMS with full LOB mode to migrate large objects.
Full LOB mode ensures LOBs are migrated without truncation.
- D
Use AWS DMS native Oracle to PostgreSQL endpoint to migrate data without schema conversion.
Why wrong: DMS can migrate data, but schema conversion is typically done separately with SCT.
- E
Enable RDS Proxy to reduce connection overhead during migration.
Why wrong: RDS Proxy is for production connection pooling, not a migration step.
DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 planning to migrate a 2 TB Oracle database to Amazon Aurora PostgreSQL. The database contains large objects (LOBs) and uses stored procedures. Which TWO steps should the company take as part of the migration? (Choose two.)
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 Schema Conversion Tool (SCT) to convert the Oracle schema and stored procedures to PostgreSQL-compatible format.
Option B is correct because the AWS Schema Conversion Tool (SCT) is specifically designed to convert Oracle schema objects, including stored procedures, to PostgreSQL-compatible format. Since the migration involves stored procedures, SCT is necessary to handle the syntax and logic differences between Oracle PL/SQL and PostgreSQL PL/pgSQL, ensuring the target database schema is ready for migration.
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.
- ✗
Set up AWS DMS ongoing replication to keep the target in sync after migration.
Why it's wrong here
Ongoing replication is for minimal downtime migrations, but not a required step for all migrations.
- ✓
Use AWS Schema Conversion Tool (SCT) to convert the Oracle schema and stored procedures to PostgreSQL-compatible format.
Why this is correct
SCT converts schema and code objects like stored procedures.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure AWS DMS with full LOB mode to migrate large objects.
Why this is correct
Full LOB mode ensures LOBs are migrated without truncation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS DMS native Oracle to PostgreSQL endpoint to migrate data without schema conversion.
Why it's wrong here
DMS can migrate data, but schema conversion is typically done separately with SCT.
- ✗
Enable RDS Proxy to reduce connection overhead during migration.
Why it's wrong here
RDS Proxy is for production connection pooling, not a migration step.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that DMS can handle schema conversion automatically, but DMS only migrates data; schema conversion requires a separate tool like SCT.
Detailed technical explanation
How to think about this question
AWS SCT converts Oracle PL/SQL stored procedures to PostgreSQL PL/pgSQL, handling constructs like cursors, exception blocks, and bulk operations. For LOBs, AWS DMS full LOB mode ensures that large objects (e.g., BLOB, CLOB) are migrated without truncation by reading the entire LOB into memory, which is critical because limited LOB mode can truncate data beyond a configurable threshold (default 32 KB). In practice, if LOBs exceed the DMS task memory limit (default 64 MB per row), you may need to adjust the MaxLobSize parameter or use inline LOB mode for better performance.
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.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Schema Conversion Tool (SCT) to convert the Oracle schema and stored procedures to PostgreSQL-compatible format. — Option B is correct because the AWS Schema Conversion Tool (SCT) is specifically designed to convert Oracle schema objects, including stored procedures, to PostgreSQL-compatible format. Since the migration involves stored procedures, SCT is necessary to handle the syntax and logic differences between Oracle PL/SQL and PostgreSQL PL/pgSQL, ensuring the target database schema is ready for migration.
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.
About these practice questions
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Last reviewed: Jun 30, 2026
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