Quick Answer
The answer is to use full load only and disable ongoing replication, because this configuration eliminates the overhead of Change Data Capture (CDC), which is the primary source of performance impact during an Oracle migration with DMS. CDC requires continuous monitoring of the source database’s redo logs and applies changes in near real-time, adding CPU and I/O load that can disrupt a high-volume transactional system. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding of how DMS full load without CDC minimizes source impact by performing a one-time snapshot rather than sustained log reading. A common trap is selecting batch-optimized apply or multiple tasks, which still rely on CDC and increase overhead. Remember the memory tip: “No CDC, no drag”—if the goal is to minimize source impact, disable ongoing replication and keep the migration a single, full-load event.
This DBS-C01 practice question tests your understanding of deployment and migration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 a 1 TB Oracle database to Amazon RDS for Oracle. The source database has a high volume of small transactions. The migration must minimize source database impact. Which AWS DMS configuration should be used?
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.
Use batch-optimized apply mode
Why wrong: Apply mode affects target, not source impact.
Use full load only and disable ongoing replication
Full load only does not require CDC, minimizing impact.
Use full load with CDC (ongoing replication)
Why wrong: CDC adds overhead to the source.
Use multiple DMS tasks to parallelize the migration
Why wrong: More tasks increase source load.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use full load only and disable ongoing replication
Using a full load without CDC for the initial migration minimizes impact because CDC adds overhead. Batch-optimized applies changes in batches, but CDC still runs. Using multiple tasks increases overhead. Full load only is the least impactful.
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.
Use batch-optimized apply mode
Why it's wrong here
Apply mode affects target, not source impact.
Use full load only and disable ongoing replication
Why this is correct
Full load only does not require CDC, minimizing impact.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
Use full load with CDC (ongoing replication)
Why it's wrong here
CDC adds overhead to the source.
Use multiple DMS tasks to parallelize the migration
Why it's wrong here
More tasks increase source load.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. 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. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 DBS-C01 ACL questions on filtering logic and placement.
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FAQ
Deployment and Migration — This question tests Deployment and Migration — Standard ACLs match source addresses..
The correct answer is: Use full load only and disable ongoing replication — Using a full load without CDC for the initial migration minimizes impact because CDC adds overhead. Batch-optimized applies changes in batches, but CDC still runs. Using multiple tasks increases overhead. Full load only is the least impactful.
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.
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 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.
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