PAS-C01 Migration Practice Question
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?
Answer choices
Why each option matters
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.
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. Option A is incorrect because Direct Connect does not increase bandwidth beyond the 100 Mbps limit; it only provides a dedicated connection. Option B is incorrect because a full load over the network at 100 Mbps would take too long for 2 TB. Option D is incorrect because Schema Conversion Tool (SCT) is used for heterogeneous migrations (e.g., Oracle to PostgreSQL), but here the target is also Oracle (homogeneous), so SCT is unnecessary.
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.
Why this is correct
Snowball Edge accelerates initial load; ongoing replication uses DMS.
- ✗
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.
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Senior Network & Security Engineer · founder of Courseiva
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