- A
AWS Snowball Edge
Why wrong: Snowball is for offline data transfer, not live migration.
- B
Amazon Aurora PostgreSQL
Target database for migration.
- C
AWS DataSync
Why wrong: DataSync is for file transfers, not databases.
- D
AWS Database Migration Service (AWS DMS)
DMS supports live migration and ongoing replication.
- E
AWS Schema Conversion Tool (AWS SCT)
SCT converts schema from Oracle to PostgreSQL.
Question 762 of 1,730
DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. 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 Amazon Aurora PostgreSQL. The migration must have minimal downtime and support ongoing replication. Which THREE services should the company use? (Choose 3.)
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 Aurora PostgreSQL
Amazon Aurora PostgreSQL (Option B) is the target database for the migration. The company is migrating from Oracle to Aurora PostgreSQL, so Aurora PostgreSQL is the required destination. AWS DMS (Option D) handles the ongoing replication with minimal downtime by using change data capture (CDC) to continuously replicate changes from the source Oracle database to the target Aurora PostgreSQL. AWS SCT (Option E) is necessary to convert the Oracle database schema and any stored procedures, functions, and other code objects to be compatible with PostgreSQL, as the two databases have different SQL dialects and data types.
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.
- ✗
AWS Snowball Edge
Why it's wrong here
Snowball is for offline data transfer, not live migration.
- ✓
Amazon Aurora PostgreSQL
Why this is correct
Target database for migration.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS DataSync
Why it's wrong here
DataSync is for file transfers, not databases.
- ✓
AWS Database Migration Service (AWS DMS)
Why this is correct
DMS supports live migration and ongoing replication.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
AWS Schema Conversion Tool (AWS SCT)
Why this is correct
SCT converts schema from Oracle to PostgreSQL.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS DataSync or Snowball Edge as viable options for database migration with ongoing replication, but these services are for file or bulk data transfer, not for continuous change data capture or schema conversion.
Detailed technical explanation
How to think about this question
AWS DMS uses a replication instance to connect to the source Oracle database via Oracle LogMiner or binary reader to capture changes from the redo logs, enabling near-real-time CDC with minimal impact on the source. AWS SCT performs a heterogeneous database assessment and converts Oracle-specific features like PL/SQL to PostgreSQL PL/pgSQL, handling data type mappings (e.g., NUMBER to NUMERIC or INTEGER) and object dependencies. Aurora PostgreSQL is a MySQL-compatible database engine that is not directly compatible with Oracle, hence the need for schema conversion.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Management and Operations — study guide chapter
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Management and Operations — This question tests Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon Aurora PostgreSQL — Amazon Aurora PostgreSQL (Option B) is the target database for the migration. The company is migrating from Oracle to Aurora PostgreSQL, so Aurora PostgreSQL is the required destination. AWS DMS (Option D) handles the ongoing replication with minimal downtime by using change data capture (CDC) to continuously replicate changes from the source Oracle database to the target Aurora PostgreSQL. AWS SCT (Option E) is necessary to convert the Oracle database schema and any stored procedures, functions, and other code objects to be compatible with PostgreSQL, as the two databases have different SQL dialects and data types.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jul 4, 2026
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