- A
Amazon Redshift
Why wrong: Amazon Redshift is a data warehouse, not designed for transactional Oracle workloads with complex stored procedures and triggers. It requires significant application changes and is not suitable for this migration.
- B
Amazon DynamoDB
Why wrong: Amazon DynamoDB is a NoSQL database and does not support relational features like stored procedures and triggers in the same way. It would require a complete rewrite of the application.
- C
Amazon RDS for Oracle
Amazon RDS for Oracle provides native Oracle compatibility, allowing the legacy Oracle database to be migrated with minimal application changes. It supports large tables, complex stored procedures, and triggers without code modifications.
- D
Amazon Aurora PostgreSQL with Babelfish
Why wrong: Amazon Aurora PostgreSQL with Babelfish provides compatibility for SQL Server's T-SQL, not Oracle's PL/SQL. Migrating Oracle stored procedures and triggers would require extensive rewriting, contradicting the goal of minimizing application changes.
- E
Amazon RDS Custom for Oracle
Amazon RDS Custom for Oracle gives OS-level access and the ability to install custom patches, which is necessary when legacy Oracle features require such access. It provides more control while still being managed.
DBS-C01 Amazon RDS for Oracle Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: amazon RDS for Oracle. 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 moving a legacy on-premises Oracle database to AWS. The database has large tables with complex stored procedures and triggers. The company wants to minimize application changes. Which THREE AWS database services should the database specialist consider? (Choose THREE.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
Amazon RDS for Oracle
Amazon RDS for Oracle (Option C) provides native Oracle compatibility, enabling migration of legacy Oracle databases with minimal application changes by directly supporting Oracle stored procedures, triggers, and large tables. Amazon RDS Custom for Oracle (Option E) offers OS-level access and flexibility for legacy Oracle features that require custom patches or configuration. Amazon Aurora PostgreSQL with Babelfish (Option D) is designed for SQL Server migrations, not Oracle, and would require significant application changes to convert Oracle PL/SQL to PostgreSQL, making it unsuitable for minimizing changes. Therefore, the correct options are C and E.
Key principle: Amazon RDS for Oracle
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon Redshift
Why it's wrong here
Amazon Redshift is a data warehouse, not designed for transactional Oracle workloads with complex stored procedures and triggers. It requires significant application changes and is not suitable for this migration.
- ✗
Amazon DynamoDB
Why it's wrong here
Amazon DynamoDB is a NoSQL database and does not support relational features like stored procedures and triggers in the same way. It would require a complete rewrite of the application.
- ✓
Amazon RDS for Oracle
Why this is correct
Amazon RDS for Oracle provides native Oracle compatibility, allowing the legacy Oracle database to be migrated with minimal application changes. It supports large tables, complex stored procedures, and triggers without code modifications.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Amazon RDS for Oracle
- ✗
Amazon Aurora PostgreSQL with Babelfish
Why it's wrong here
Amazon Aurora PostgreSQL with Babelfish provides compatibility for SQL Server's T-SQL, not Oracle's PL/SQL. Migrating Oracle stored procedures and triggers would require extensive rewriting, contradicting the goal of minimizing application changes.
- ✓
Amazon RDS Custom for Oracle
Why this is correct
Amazon RDS Custom for Oracle gives OS-level access and the ability to install custom patches, which is necessary when legacy Oracle features require such access. It provides more control while still being managed.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Amazon RDS for Oracle
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may incorrectly assume that any service with 'compatibility' or 'translation' works for all database engines. Babelfish specifically targets SQL Server, not Oracle, so it does not help with Oracle migrations.
Detailed technical explanation
How to think about this question
Amazon RDS Custom for Oracle (Option E) is also correct as it provides full administrative access to the underlying Oracle database, enabling the migration of legacy features like custom stored procedures and triggers that may rely on OS-level dependencies. Amazon Aurora PostgreSQL with Babelfish (Option D) is correct because Babelfish translates SQL Server T-SQL to PostgreSQL, but for Oracle migrations, it is less relevant; however, the question specifies minimizing application changes, and Babelfish can handle some Oracle-specific syntax if the application uses standard SQL, though it is primarily for SQL Server compatibility.
KKey Concepts to Remember
- Amazon RDS for Oracle
- Amazon RDS Custom for Oracle
- Amazon Aurora PostgreSQL with Babelfish
- Legacy Oracle Migration
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
Amazon RDS for Oracle
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review amazon RDS for Oracle, then practise related DBS-C01 questions on the same topic to reinforce the concept.
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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 — Amazon RDS for Oracle.
What is the correct answer to this question?
The correct answer is: Amazon RDS for Oracle — Amazon RDS for Oracle (Option C) provides native Oracle compatibility, enabling migration of legacy Oracle databases with minimal application changes by directly supporting Oracle stored procedures, triggers, and large tables. Amazon RDS Custom for Oracle (Option E) offers OS-level access and flexibility for legacy Oracle features that require custom patches or configuration. Amazon Aurora PostgreSQL with Babelfish (Option D) is designed for SQL Server migrations, not Oracle, and would require significant application changes to convert Oracle PL/SQL to PostgreSQL, making it unsuitable for minimizing changes. Therefore, the correct options are C and E.
What should I do if I get this DBS-C01 question wrong?
Review amazon RDS for Oracle, then practise related DBS-C01 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Amazon RDS for Oracle
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Last reviewed: Jun 24, 2026
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