PAS-C01 Migration Practice Question
A company is migrating a legacy on-premises application to AWS. The application uses a MySQL database with a complex stored procedure that runs every hour and takes approximately 10 minutes to complete. The company wants to minimize downtime during migration. Which TWO approaches should the company use to migrate the database?
⚠ Common exam trap
Many candidates assume mysqldump or a full-load-only DMS task is sufficient for minimizing downtime, overlooking the need for ongoing replication to handle continuous changes during the migration window.
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 Database Migration Service (DMS) with ongoing replication from the source MySQL database to an Amazon RDS for MySQL instance.
AWS DMS with ongoing replication allows continuous synchronization from the source MySQL database to Amazon RDS for MySQL, minimizing downtime during migration. The complex stored procedure that runs hourly and takes 10 minutes is handled seamlessly as DMS captures ongoing changes, enabling a controlled cutover with minimal disruption.
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 only, without ongoing replication, and schedule a cutover window.
Why it's wrong here
Without ongoing replication, changes after the full load are not replicated, causing data loss or extended downtime.
- ✓
Use AWS Database Migration Service (DMS) with ongoing replication from the source MySQL database to an Amazon RDS for MySQL instance.
Why this is correct
This approach minimizes downtime by continuously replicating changes until cutover.
- ✓
Set up an Amazon Aurora MySQL DB cluster and use AWS DMS with the on-premises MySQL database as the source and the Aurora cluster as the target, enabling ongoing replication.
Why this is correct
This allows continuous replication and leverages Aurora's performance and compatibility.
- ✗
Take a full database dump using mysqldump and import it into an Amazon RDS for MySQL instance during a planned maintenance window.
Why it's wrong here
This causes significant downtime during the export/import process.
- ✗
Create an Amazon RDS for MySQL read replica from the on-premises database.
Why it's wrong here
RDS read replica does not support replication from an on-premises database; it only works within AWS.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-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 PAS-C01 exam.