← DBS-C01·Amazon Web Services

Question 1,531 of 1,730

Deployment and Migration →mediumMultiple ChoiceObjective-mapped

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 an on-premises PostgreSQL database to Amazon RDS for PostgreSQL. The database is 2 TB in size and has a high write volume. The migration window is limited to 4 hours. Which migration approach provides the fastest initial load with minimal downtime?

Question 1mediummultiple choice

Full question →

A
Use pg_dump to export the database and pg_restore to import into RDS.
Why wrong: pg_dump/pg_restore can be slow for large databases and requires downtime for the entire export/import process.
B
Create a read replica of the on-premises database and promote it to a standalone database in RDS.
Why wrong: Read replicas are not supported between on-premises and RDS; they require an existing RDS instance.
C
Use AWS Schema Conversion Tool (AWS SCT) to convert the schema and then use AWS DMS for ongoing replication.
Why wrong: SCT only converts schema, not data; DMS is needed for data migration but this approach includes SCT overhead.
D
Use AWS DMS with PostgreSQL as source and target, using native logical replication for full load and ongoing replication.
DMS with logical replication can perform a full load quickly and then keep the target in sync with minimal downtime.

Full breakdown with real-world context →

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 PostgreSQL as source and target, using native logical replication for full load and ongoing replication.

Option B is correct because AWS DMS can perform a full load using native PostgreSQL logical replication, which is faster than AWS SCT alone (which only converts schema) and faster than using pg_dump/pg_restore for a 2 TB database within 4 hours. Option A is wrong because SCT does not migrate data. Option C is wrong because traditional backup/restore requires downtime for the entire duration. Option D is wrong because read replicas are not applicable for cross-engine migration.

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 pg_dump to export the database and pg_restore to import into RDS.
Why it's wrong here
pg_dump/pg_restore can be slow for large databases and requires downtime for the entire export/import process.
✗
Create a read replica of the on-premises database and promote it to a standalone database in RDS.
Why it's wrong here
Read replicas are not supported between on-premises and RDS; they require an existing RDS instance.
✗
Use AWS Schema Conversion Tool (AWS SCT) to convert the schema and then use AWS DMS for ongoing replication.
Why it's wrong here
SCT only converts schema, not data; DMS is needed for data migration but this approach includes SCT overhead.
✓
Use AWS DMS with PostgreSQL as source and target, using native logical replication for full load and ongoing replication.
Why this is correct
DMS with logical replication can perform a full load quickly and then keep the target in sync with minimal 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 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.

Related DBS-C01 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Workload-Specific Database Design practice questions

Practise DBS-C01 questions linked to Workload-Specific Database Design.

Deployment and Migration practice questions

Practise DBS-C01 questions linked to Deployment and Migration.

Management and Operations practice questions

Practise DBS-C01 questions linked to Management and Operations.

Monitoring and Troubleshooting practice questions

Practise DBS-C01 questions linked to Monitoring and Troubleshooting.

Database Security practice questions

Practise DBS-C01 questions linked to Database Security.

DBS-C01 fundamentals practice questions

Practise DBS-C01 questions linked to DBS-C01 fundamentals.

DBS-C01 scenario practice questions

Practise DBS-C01 questions linked to DBS-C01 scenario.

DBS-C01 troubleshooting practice questions

Practise DBS-C01 questions linked to DBS-C01 troubleshooting.

Practice this exam

Start a free DBS-C01 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

DBS-C01 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this DBS-C01 question test?

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 PostgreSQL as source and target, using native logical replication for full load and ongoing replication. — Option B is correct because AWS DMS can perform a full load using native PostgreSQL logical replication, which is faster than AWS SCT alone (which only converts schema) and faster than using pg_dump/pg_restore for a 2 TB database within 4 hours. Option A is wrong because SCT does not migrate data. Option C is wrong because traditional backup/restore requires downtime for the entire duration. Option D is wrong because read replicas are not applicable for cross-engine migration.

What should I do if I get this DBS-C01 question wrong?

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Keep practising

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

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.