Quick Answer
The correct answer is to disable the trigger on the target Aurora database during migration. This resolves the DMS migration trigger error because AWS DMS performs a full load by writing directly to the target tables, and any active trigger that attempts to insert into an external web service will cause a target metadata error, as the database cannot complete the write operation while waiting for an external call that may time out or fail. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding of how DMS interacts with target database objects during a migration, particularly the need to suppress triggers, foreign keys, and constraints to ensure a clean data transfer. A common trap is to assume the issue lies with DMS version or source-side triggers, but the problem is strictly on the target side. Remember the memory tip: “Target triggers trap traffic—disable them during data transfer.”
This DBS-C01 practice question tests your understanding of deployment and migration. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 500 GB PostgreSQL database from on-premises to Amazon Aurora PostgreSQL. The migration must be completed within 6 hours with minimal downtime. The on-premises network bandwidth is 500 Mbps. The team decides to use AWS DMS. During initial full load, DMS reports a 'Target metadata error: cannot write to Aurora' for a specific table. Investigation shows that the table has a trigger that tries to insert into an external web service. What should the team do to resolve this issue?
Disable the trigger on the target Aurora database during migration.
Prevents the trigger from interfering with DMS writes.
Increase the DMS replication instance size.
Why wrong: Does not resolve the trigger error.
Upgrade the DMS replication instance engine version.
Why wrong: Not relevant to trigger errors.
Disable the trigger on the source database.
Why wrong: The trigger is on the target, not source.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Disable the trigger on the target Aurora database during migration.
Option C is correct: disabling triggers on the target prevents external calls during migration. Option A is wrong because the issue is not about DMS version. Option B is wrong because disabling the trigger on the source does not help. Option D is wrong because increasing instance size does not fix the trigger issue.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Disable the trigger on the target Aurora database during migration.
Why this is correct
Prevents the trigger from interfering with DMS writes.
Related concept
Read the scenario before looking for a memorised answer.
Increase the DMS replication instance size.
Why it's wrong here
Does not resolve the trigger error.
Upgrade the DMS replication instance engine version.
Why it's wrong here
Not relevant to trigger errors.
Disable the trigger on the source database.
Why it's wrong here
The trigger is on the target, not source.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Deployment and Migration — study guide chapter
Learn the concepts, then practise the questions
Deployment and Migration practice questions
Targeted practice on this topic area only
All DBS-C01 questions
1,730 questions across all exam domains
AWS Certified Database Specialty DBS-C01 study guide
Full concept coverage aligned to exam objectives
DBS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise DBS-C01 questions linked to Workload-Specific Database Design.
Practise DBS-C01 questions linked to Deployment and Migration.
Practise DBS-C01 questions linked to Management and Operations.
Practise DBS-C01 questions linked to Monitoring and Troubleshooting.
Practise DBS-C01 questions linked to Database Security.
Practise DBS-C01 questions linked to DBS-C01 fundamentals.
Practise DBS-C01 questions linked to DBS-C01 scenario.
Practise DBS-C01 questions linked to DBS-C01 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
The correct answer is: Disable the trigger on the target Aurora database during migration. — Option C is correct: disabling triggers on the target prevents external calls during migration. Option A is wrong because the issue is not about DMS version. Option B is wrong because disabling the trigger on the source does not help. Option D is wrong because increasing instance size does not fix the trigger issue.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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 →
Last reviewed: Jun 20, 2026
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.
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.
Sign in to join the discussion.