The correct approach is to use AWS DMS with AWS Snowball Edge for the full load, then ongoing replication. This is because a 2 TB Oracle to RDS migration over a slow network of only 100 Mbps would take over 45 hours for the initial full load alone, making a direct upload impractical. AWS Snowball Edge physically ships the data, bypassing bandwidth constraints entirely, and once the full load is seeded on RDS, AWS DMS handles ongoing replication to capture incremental changes. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of hybrid migration strategies for large databases with limited bandwidth—a common trap is choosing direct DMS over the network (which is too slow) or assuming a homogeneous tool like Oracle GoldenGate is needed. Remember the memory tip: "Ship the bulk, sync the trickle"—use Snowball for the heavy lift, then DMS for the ongoing changes.
PAS-C01 Migration Practice Question
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. The database size is 2 TB and the network bandwidth between the on-premises data center and AWS is 100 Mbps. The company needs to minimize the migration time and wants to use AWS DMS. Which approach should they take?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS DMS with AWS Snowball Edge for the full load, then ongoing replication.
Option B is correct because AWS Snowball Edge can be used with AWS DMS to transfer the full load of large databases over a physical device, avoiding long upload times over limited bandwidth. After the full load, ongoing replication via DMS handles changes. Options A and D would take too long over 100 Mbps; Option C is for homogeneous migrations, but the full load over low bandwidth is slow.
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 Database Migration Service (DMS) with AWS Direct Connect to increase bandwidth.
Why it's wrong here
Direct Connect still limited to 100 Mbps unless upgraded, which may not be feasible.
✗
Use AWS DMS with a full load over the network, then ongoing replication.
Why it's wrong here
Full load over 100 Mbps would take too long.
✓
Use AWS DMS with AWS Snowball Edge for the full load, then ongoing replication.
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
✗
Use AWS Schema Conversion Tool (SCT) to convert the schema and then AWS DMS for full load.
Why it's wrong here
SCT handles schema conversion, but the full load still over network is slow.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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 PAS-C01 ACL questions on filtering logic and placement.
Migration — This question tests Migration — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use AWS DMS with AWS Snowball Edge for the full load, then ongoing replication. — Option B is correct because AWS Snowball Edge can be used with AWS DMS to transfer the full load of large databases over a physical device, avoiding long upload times over limited bandwidth. After the full load, ongoing replication via DMS handles changes. Options A and D would take too long over 100 Mbps; Option C is for homogeneous migrations, but the full load over low bandwidth is slow.
What should I do if I get this PAS-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 PAS-C01 ACL questions on filtering logic and placement.
Are there clue words in this question I should notice?
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.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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