DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 PostgreSQL database to Amazon RDS for PostgreSQL. The database is 2 TB and has a sustained write rate of 150 MB/s. The migration must have minimal downtime. Which AWS service or tool should be used for the initial data load and ongoing replication?
Use AWS Database Migration Service (AWS DMS) with full load and ongoing replication
AWS DMS supports full load and ongoing replication with minimal downtime.
B
Use pg_dump and pg_restore
Why wrong: pg_dump/pg_restore cannot perform ongoing replication; downtime would be significant for 2 TB.
C
Use AWS Schema Conversion Tool (AWS SCT) to convert schema and AWS DMS for data migration
Why wrong: AWS SCT is used for schema conversion, not data migration; the question states PostgreSQL to PostgreSQL, so schema conversion is not needed.
D
Use AWS S3 Transfer Acceleration to upload data to Amazon S3, then restore to RDS
Why wrong: S3 does not provide database replication; this method would not support ongoing changes.
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 (AWS DMS) with full load and ongoing replication
AWS DMS supports ongoing replication from on-premises to RDS with minimal downtime. Option A is incorrect because pg_dump/pg_restore cannot perform ongoing replication. Option B is incorrect because S3 is for storage, not database replication. Option D is incorrect because the Schema Conversion Tool does not handle data migration.
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.
✓
Use AWS Database Migration Service (AWS DMS) with full load and ongoing replication
Why this is correct
AWS DMS supports full load and ongoing replication with minimal downtime.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use pg_dump and pg_restore
Why it's wrong here
pg_dump/pg_restore cannot perform ongoing replication; downtime would be significant for 2 TB.
✗
Use AWS Schema Conversion Tool (AWS SCT) to convert schema and AWS DMS for data migration
Why it's wrong here
AWS SCT is used for schema conversion, not data migration; the question states PostgreSQL to PostgreSQL, so schema conversion is not needed.
✗
Use AWS S3 Transfer Acceleration to upload data to Amazon S3, then restore to RDS
Why it's wrong here
S3 does not provide database replication; this method would not support ongoing changes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Database Migration Service (AWS DMS) with full load and ongoing replication — AWS DMS supports ongoing replication from on-premises to RDS with minimal downtime. Option A is incorrect because pg_dump/pg_restore cannot perform ongoing replication. Option B is incorrect because S3 is for storage, not database replication. Option D is incorrect because the Schema Conversion Tool does not handle data migration.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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