Quick Answer
The answer is Amazon RDS for Oracle, as it provides the most direct Oracle to AWS migration path with minimal code changes for an OLTP workload. This service maintains full compatibility with Oracle’s stored procedures, triggers, and strong consistency, allowing the existing application logic to run unchanged on a managed RDS instance. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that RDS for Oracle is the correct choice when the requirement is to preserve Oracle-specific features without rewriting code, while options like Aurora PostgreSQL or DynamoDB would demand significant refactoring. A common trap is assuming Aurora PostgreSQL is always better for cost or performance, but for minimal changes, native Oracle support is paramount. Memory tip: “RDS for Oracle keeps the Oracle, so your code stays oral.”
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 AWS. The database is 5 TB and supports a critical OLTP application with high transaction rates. The application requires stored procedures, triggers, and strong consistency. Which AWS database service is most appropriate with minimal application changes?
Amazon Aurora PostgreSQL
Why wrong: Requires application changes for Oracle compatibility.
Amazon DynamoDB
Why wrong: Does not support stored procedures or triggers natively.
Amazon RDS for Oracle
Fully compatible with Oracle, minimal changes needed.
Amazon Redshift
Why wrong: Not designed for OLTP workloads.
Answer choices
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 is the most direct migration path with minimal changes because it is fully compatible with Oracle and supports stored procedures, triggers, and strong consistency. Option A (Aurora PostgreSQL) is wrong because it requires converting Oracle-specific features to PostgreSQL. Option C (DynamoDB) is wrong because it does not support stored procedures or triggers natively (except for DynamoDB Streams and Lambda). Option D (Redshift) is wrong because it is a data warehouse, not for OLTP.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon Aurora PostgreSQL
Why it's wrong here
Requires application changes for Oracle compatibility.
Amazon DynamoDB
Why it's wrong here
Does not support stored procedures or triggers natively.
Amazon RDS for Oracle
Why this is correct
Fully compatible with Oracle, minimal changes needed.
Related concept
Static NAT maps one inside address to one outside address.
Amazon Redshift
Why it's wrong here
Not designed for OLTP workloads.
Common exam traps
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
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.
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
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
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.
Workload-Specific Database Design — study guide chapter
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FAQ
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Static NAT maps one inside address to one outside address..
The correct answer is: Amazon RDS for Oracle — Amazon RDS for Oracle is the most direct migration path with minimal changes because it is fully compatible with Oracle and supports stored procedures, triggers, and strong consistency. Option A (Aurora PostgreSQL) is wrong because it requires converting Oracle-specific features to PostgreSQL. Option C (DynamoDB) is wrong because it does not support stored procedures or triggers natively (except for DynamoDB Streams and Lambda). Option D (Redshift) is wrong because it is a data warehouse, not for OLTP.
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.
Static NAT maps one inside address to one outside address.
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Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is migrating an on-premises Oracle OLTP workload to AWS. The database has complex stored procedures and requires minimal code changes. Which AWS database service is the most suitable target?
easyWhy D: Amazon RDS for Oracle allows minimal code changes as it is compatible with Oracle. Option B (Aurora PostgreSQL) would require rewriting procedures. Option C (DynamoDB) is NoSQL. Option D (Redshift) is for analytics.
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Last reviewed: Jun 20, 2026
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.
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