- A
Deploy Amazon RDS for PostgreSQL with Babelfish to run Oracle PL/SQL code natively.
Why wrong: Babelfish is for SQL Server compatibility, not Oracle.
- B
Use AWS Database Migration Service (DMS) with the AWS Schema Conversion Tool (SCT) to convert the schema and migrate data, then handle remaining incompatibilities during a cutover window.
SCT automates schema conversion, and DMS supports minimal downtime via ongoing replication.
- C
Use pg_dump and pg_restore to migrate the schema, and then test and fix any errors.
Why wrong: pg_dump/pg_restore cannot convert Oracle schema; they are for PostgreSQL-to-PostgreSQL migrations.
- D
Manually rewrite all stored procedures and triggers to PostgreSQL syntax before migration.
Why wrong: Manual conversion is time-consuming and prone to errors; automated tools are preferred.
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 OLTP database to Amazon Aurora PostgreSQL. The database has a complex schema with stored procedures, triggers, and sequences. During the migration, the team notices that the conversion tool reports several incompatibilities. Which strategy should the team use to handle the database schema changes with minimal downtime?
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 Database Migration Service (DMS) with the AWS Schema Conversion Tool (SCT) to convert the schema and migrate data, then handle remaining incompatibilities during a cutover window.
Option B is correct because AWS DMS can handle ongoing replication after initial load, and the AWS Schema Conversion Tool (SCT) can convert schema. Option A is wrong because converting manually is error-prone and time-consuming. Option C is wrong because Babelfish is for SQL Server, not Oracle. Option D is wrong because writing a custom script is not recommended given available tools.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Deploy Amazon RDS for PostgreSQL with Babelfish to run Oracle PL/SQL code natively.
Why it's wrong here
Babelfish is for SQL Server compatibility, not Oracle.
- ✓
Use AWS Database Migration Service (DMS) with the AWS Schema Conversion Tool (SCT) to convert the schema and migrate data, then handle remaining incompatibilities during a cutover window.
Why this is correct
SCT automates schema conversion, and DMS supports minimal downtime via ongoing replication.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use pg_dump and pg_restore to migrate the schema, and then test and fix any errors.
Why it's wrong here
pg_dump/pg_restore cannot convert Oracle schema; they are for PostgreSQL-to-PostgreSQL migrations.
- ✗
Manually rewrite all stored procedures and triggers to PostgreSQL syntax before migration.
Why it's wrong here
Manual conversion is time-consuming and prone to errors; automated tools are preferred.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use AWS Database Migration Service (DMS) with the AWS Schema Conversion Tool (SCT) to convert the schema and migrate data, then handle remaining incompatibilities during a cutover window. — Option B is correct because AWS DMS can handle ongoing replication after initial load, and the AWS Schema Conversion Tool (SCT) can convert schema. Option A is wrong because converting manually is error-prone and time-consuming. Option C is wrong because Babelfish is for SQL Server, not Oracle. Option D is wrong because writing a custom script is not recommended given available tools.
What should I do if I get this DBS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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