DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 needs to migrate a 5 TB Oracle database to Amazon Aurora PostgreSQL. The company has a limited maintenance window and requires the migration to be completed within a few hours. Which approach should be used?
Use AWS Schema Conversion Tool (AWS SCT) to convert the schema and AWS DMS for data migration
Why wrong: Schema conversion is needed, but the question asks for the approach; DMS alone is not sufficient without schema conversion for heterogeneous migration.
B
Use pg_dump to export the Oracle database and pg_restore to import into Aurora
Why wrong: pg_dump is for PostgreSQL, not Oracle.
C
Use AWS Database Migration Service (AWS DMS) to migrate the data
AWS DMS supports heterogeneous migrations from Oracle to Aurora PostgreSQL.
D
Use AWS S3 to store the data and AWS Glue to transform and load into Aurora
Why wrong: This is not a standard approach for database migration and may be slower.
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) to migrate the data
AWS DMS can handle large data migrations efficiently. Option A is incorrect because pg_dump is for PostgreSQL, not Oracle. Option C is incorrect because S3 is not suitable for direct database migration. Option D is incorrect because AWS SCT is for schema conversion, not data migration.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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 Schema Conversion Tool (AWS SCT) to convert the schema and AWS DMS for data migration
Why it's wrong here
Schema conversion is needed, but the question asks for the approach; DMS alone is not sufficient without schema conversion for heterogeneous migration.
✗
Use pg_dump to export the Oracle database and pg_restore to import into Aurora
Why it's wrong here
pg_dump is for PostgreSQL, not Oracle.
✓
Use AWS Database Migration Service (AWS DMS) to migrate the data
Why this is correct
AWS DMS supports heterogeneous migrations from Oracle to Aurora PostgreSQL.
Related concept
Standard ACLs match source addresses.
✗
Use AWS S3 to store the data and AWS Glue to transform and load into Aurora
Why it's wrong here
This is not a standard approach for database migration and may be slower.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DBS-C01 ACL questions on filtering logic and placement.
Deployment and Migration — This question tests Deployment and Migration — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use AWS Database Migration Service (AWS DMS) to migrate the data — AWS DMS can handle large data migrations efficiently. Option A is incorrect because pg_dump is for PostgreSQL, not Oracle. Option C is incorrect because S3 is not suitable for direct database migration. Option D is incorrect because AWS SCT is for schema conversion, not data migration.
What should I do if I get this DBS-C01 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DBS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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