This PAS-C01 practice question tests your understanding of 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 is migrating an on-premises Oracle database to Amazon RDS for Oracle. They want to minimize downtime. Which AWS service should they use for the initial data load and ongoing replication?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
AWS Schema Conversion Tool (SCT)
Why wrong: SCT is for schema conversion, not data replication.
AWS Database Migration Service (DMS)
DMS supports ongoing replication for minimal downtime.
AWS Snowball
Why wrong: Snowball is for offline data transfer, not ongoing replication.
AWS DataSync
Why wrong: DataSync is for file and object storage transfers, not databases.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Database Migration Service (DMS)
AWS Database Migration Service (DMS) supports ongoing replication from Oracle to RDS Oracle, enabling minimal downtime migration. Option A is incorrect because AWS Snowball is for large-scale data transfer, not continuous replication. Option B is incorrect because AWS DataSync is optimized for file storage, not databases. Option D is incorrect because AWS SCT is a schema conversion tool, not a replication service.
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
For each option: why learners choose it and why it is or isn't the right answer here.
AWS Schema Conversion Tool (SCT)
Why it's wrong here
SCT is for schema conversion, not data replication.
AWS Database Migration Service (DMS)
Why this is correct
DMS supports ongoing replication for minimal downtime.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
AWS Snowball
Why it's wrong here
Snowball is for offline data transfer, not ongoing replication.
AWS DataSync
Why it's wrong here
DataSync is for file and object storage transfers, not databases.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
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.
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
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
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 PAS-C01 ACL questions on filtering logic and placement.
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FAQ
Migration — This question tests Migration — Standard ACLs match source addresses..
The correct answer is: AWS Database Migration Service (DMS) — AWS Database Migration Service (DMS) supports ongoing replication from Oracle to RDS Oracle, enabling minimal downtime migration. Option A is incorrect because AWS Snowball is for large-scale data transfer, not continuous replication. Option B is incorrect because AWS DataSync is optimized for file storage, not databases. Option D is incorrect because AWS SCT is a schema conversion tool, not a replication service.
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 PAS-C01 ACL questions on filtering logic and placement.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
This PAS-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 PAS-C01 exam.
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