DBS-C01 Deployment and Migration Practice Question
Which TWO of the following are required when migrating an on-premises Oracle database to Amazon RDS for Oracle using AWS DMS with change data capture (CDC)? (Select TWO.)
⚠ Common exam trap
It's easy for candidates to assume a full backup (Option B) is required for DMS, but DMS performs its own full load and CDC independently, making the backup unnecessary, while they overlook the critical requirement of enabling supplemental logging (Option C) for CDC to function.
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 SCT to assess schema compatibility.
AWS SCT (Schema Conversion Tool) is required to assess and convert the source Oracle schema to a format compatible with Amazon RDS for Oracle, ensuring that data types, indexes, and other objects are correctly mapped before migration. This step is critical because even though both are Oracle databases, differences in version, parameter settings, and storage engines can cause schema incompatibilities that DMS cannot handle automatically.
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 SCT to assess schema compatibility.
Why this is correct
Required for schema conversion.
- ✗
Create a full backup of the source database.
Why it's wrong here
Not required; DMS uses logical replication.
- ✓
Enable supplemental logging on the source Oracle database.
Why this is correct
Needed for CDC.
- ✗
Set up Oracle Data Guard for replication.
Why it's wrong here
DMS handles replication.
- ✗
Manually create target tables in RDS.
Why it's wrong here
DMS can create them.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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Same concept, more angles
1 more way this is tested on DBS-C01
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. Which TWO of the following are valid considerations when migrating an on-premises Oracle database to Amazon RDS for Oracle using AWS DMS? (Select TWO.)
medium- A.DMS automatically converts Oracle stored procedures to RDS for Oracle compatible code.
- ✓ B.DMS can continue to replicate changes after the full load is complete until the cutover.
- C.DMS automatically converts partitioned tables to non-partitioned tables.
- D.DMS can migrate directly to Amazon RDS Custom for Oracle without any configuration changes.
- ✓ E.DMS can perform ongoing replication to minimize downtime during migration.
Why B: AWS DMS supports ongoing replication (change data capture, CDC) after the full load completes, allowing you to keep the target database synchronized with the source until you perform the cutover. This minimizes downtime because you can replicate ongoing changes from the on-premises Oracle database to Amazon RDS for Oracle, then stop all applications and switch over with only a brief interruption.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.