The answer is Option A, using AWS DMS with ongoing replication from Oracle to HANA, because it directly addresses the heterogeneous migration from Oracle on AIX to SAP S/4HANA on AWS while minimizing downtime through continuous change data capture. AWS DMS supports the schema conversion already performed by AWS SCT and can handle the 5 TB dataset within the 2-week window at 100 Mbps by streaming changes until the final cutover, making it the only option that meets both the technical and time constraints. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding that DMS is the correct service for heterogeneous database migrations with minimal downtime, while options like Snowball Edge or DataSync are file-based and cannot replicate ongoing transactions, and HANA system replication requires a HANA source. A key trap is assuming Snowball is faster for large datasets, but it lacks the replication capability needed for a near-zero downtime cutover. Remember: DMS for DB migrations, Snowball for files.
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 global company is migrating its SAP ERP system to AWS. The system runs SAP ECC on IBM AIX with Oracle Database. The company plans to move to SAP S/4HANA on AWS. The source system is 5 TB in size. The network bandwidth between the on-premises data center and AWS is 100 Mbps. The migration must be completed within a 2-week window with minimal downtime. The company has a SAP license that allows running S/4HANA on certified hardware. They have already used AWS SCT to convert the database schema to SAP HANA-compatible format. They now need to execute the data migration. The team is considering the following options:
Option A: Use AWS DMS with ongoing replication from Oracle to HANA, then perform a final cutover.
Option B: Use AWS Snowball Edge to transfer the Oracle backup files to AWS, then restore to HANA.
Option C: Use AWS DataSync to copy the Oracle data files to Amazon EFS, then import into HANA.
Option D: Use SAP HANA system replication from the source Oracle database to the target HANA database.
Which option is the most feasible and efficient for this migration?
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 ongoing replication from Oracle to HANA, then perform a final cutover
Option A is the most feasible because AWS DMS can handle the heterogeneous migration from Oracle to HANA, and the ongoing replication minimizes downtime. Option B is inefficient because restoring from backup may not support ongoing replication and adds complexity. Option C (DataSync) is for files, not databases. Option D (HANA system replication) requires the source to be HANA, not Oracle.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 SAP HANA system replication from the source Oracle database to the target HANA database
Why it's wrong here
HANA system replication requires both source and target to be HANA databases.
✗
Use AWS Snowball Edge to transfer the Oracle backup files to AWS, then restore to HANA
Why it's wrong here
Restoring from backup may not capture ongoing changes and is more complex.
✗
Use AWS DataSync to copy the Oracle data files to Amazon EFS, then import into HANA
Why it's wrong here
DataSync is for file-level transfer, not database migration.
✓
Use AWS DMS with ongoing replication from Oracle to HANA, then perform a final cutover
Why this is correct
DMS supports heterogeneous migrations and ongoing replication to minimize downtime.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
Migration — This question tests Migration — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use AWS DMS with ongoing replication from Oracle to HANA, then perform a final cutover — Option A is the most feasible because AWS DMS can handle the heterogeneous migration from Oracle to HANA, and the ongoing replication minimizes downtime. Option B is inefficient because restoring from backup may not support ongoing replication and adds complexity. Option C (DataSync) is for files, not databases. Option D (HANA system replication) requires the source to be HANA, not Oracle.
What should I do if I get this PAS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PAS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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