← DBS-C01·Amazon Web Services

Question 1,267 of 1,730

Deployment and Migration →hardMultiple ChoiceObjective-mapped

DBS-C01 Deployment and Migration Practice Question

This DBS-C01 practice question tests your understanding of deployment and migration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 wants to migrate an on-premises MySQL database to Amazon RDS for MySQL. The database is 500 GB and experiences heavy write traffic. They need to minimize downtime and ensure no data loss. Which approach should they take?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

A
Use AWS DMS with a full load task, then cut over the application to RDS.
Why wrong: Full load only does not capture changes made during the migration, leading to data loss.
B
Set up MySQL replication from the on-premises database to RDS, then promote the RDS instance when ready.
Replication captures ongoing changes, minimizing downtime and ensuring data consistency.
C
Create an RDS read replica of the on-premises database, then promote it to a standalone instance.
Why wrong: RDS read replicas cannot be created from an external MySQL instance; they only work within RDS.
D
Use mysqldump to export the database and mysql command to import into RDS during a maintenance window.
Why wrong: This requires the source database to be offline during export, causing 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

✓

Set up MySQL replication from the on-premises database to RDS, then promote the RDS instance when ready.

Option B is correct because setting up native MySQL replication from the on-premises database to Amazon RDS for MySQL allows continuous synchronization with minimal downtime. When ready, you simply stop replication and promote the RDS instance, ensuring zero data loss since all transactions are replicated in near real-time.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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 DMS with a full load task, then cut over the application to RDS.
Why it's wrong here
Full load only does not capture changes made during the migration, leading to data loss.
✓
Set up MySQL replication from the on-premises database to RDS, then promote the RDS instance when ready.
Why this is correct
Replication captures ongoing changes, minimizing downtime and ensuring data consistency.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create an RDS read replica of the on-premises database, then promote it to a standalone instance.
Why it's wrong here
RDS read replicas cannot be created from an external MySQL instance; they only work within RDS.
✗
Use mysqldump to export the database and mysql command to import into RDS during a maintenance window.
Why it's wrong here
This requires the source database to be offline during export, causing downtime.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse AWS DMS's ongoing replication (CDC) with a full load task, or mistakenly think RDS read replicas can be created from external databases, leading them to choose options that either risk data loss or are technically impossible.

Detailed technical explanation

How to think about this question

Native MySQL replication uses the binary log (binlog) to stream changes from the on-premises master to the RDS replica. The RDS instance must be configured with binary log retention and the correct GTID or file-position-based replication settings. In real-world scenarios, network latency and binlog retention on the on-premises master must be monitored to avoid replication lag that could delay cutover.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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 — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Set up MySQL replication from the on-premises database to RDS, then promote the RDS instance when ready. — Option B is correct because setting up native MySQL replication from the on-premises database to Amazon RDS for MySQL allows continuous synchronization with minimal downtime. When ready, you simply stop replication and promote the RDS instance, ensuring zero data loss since all transactions are replicated in near real-time.

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

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

What is the key concept behind this question?

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 →

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.