DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and 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 a 5 TB PostgreSQL database to Amazon Aurora PostgreSQL. The database has complex stored procedures and triggers. The migration must be completed within a 30-minute downtime window. Which approach would meet the requirement?
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 full load and ongoing replication, then perform a cutover.
Option B is correct because AWS DMS with ongoing replication can keep the target in sync and then perform a cutover within minutes. Option A is wrong because AWS SCT is for schema conversion, not data migration. Option C is wrong because Aurora native replication only works from Aurora to Aurora. Option D is wrong because pg_dump/pg_restore would take longer than 30 minutes for 5 TB.
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 Database Migration Service (DMS) with validation only.
Why it's wrong here
Validation does not migrate data.
✓
Use AWS DMS with full load and ongoing replication, then perform a cutover.
Why this is correct
Ongoing replication allows a fast cutover.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS SCT to convert the schema and then use pg_dump/pg_restore.
Why it's wrong here
pg_dump/pg_restore for 5 TB will exceed 30 minutes.
✗
Set up an Aurora read replica from the source PostgreSQL.
Why it's wrong here
Aurora cannot replicate from external PostgreSQL.
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 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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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
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 DBS-C01 NAT questions on configuration and troubleshooting.
Deployment and Migration — This question tests Deployment and 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 full load and ongoing replication, then perform a cutover. — Option B is correct because AWS DMS with ongoing replication can keep the target in sync and then perform a cutover within minutes. Option A is wrong because AWS SCT is for schema conversion, not data migration. Option C is wrong because Aurora native replication only works from Aurora to Aurora. Option D is wrong because pg_dump/pg_restore would take longer than 30 minutes for 5 TB.
What should I do if I get this DBS-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 DBS-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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