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DBS-C01 Workload-Specific Database Design Practice Question
Arrange the steps to migrate an on-premises Oracle database to Amazon RDS for Oracle using AWS DMS (Database Migration Service) in the correct order.
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
✓
Launch the DMS replication instance, then configure the source and target endpoints, then create the migration task, then monitor the migration task.
DMS migration requires setting up the replication instance, configuring endpoints with proper source database settings for CDC, creating a migration task, and monitoring for completion.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Launch the DMS replication instance, then configure the source and target endpoints, then create the migration task, then monitor the migration task.
Why this is correct
This order follows AWS best practices: first create the replication instance to provide compute resources, then configure endpoints with connection details, then create a migration task specifying the source, target, and type (full load or CDC), and finally monitor the task for completion and errors.
- ✗
Configure the source and target endpoints, then launch the DMS replication instance, then create the migration task, then monitor the migration task.
Why it's wrong here
While you can create endpoints before the replication instance, this order is suboptimal and not standard because the replication instance is needed to test endpoint connectivity. The recommended order is to launch the replication instance first to ensure it's available for endpoint validation.
- ✗
Launch the DMS replication instance, then create the migration task, then configure the source and target endpoints, then monitor the migration task.
Why it's wrong here
This is incorrect because a migration task requires both source and target endpoints to be configured beforehand. Creating the task before endpoints will fail as the task references endpoints by ARN.
- ✗
Configure the source and target endpoints, then launch the DMS replication instance, then monitor the migration task, then create the migration task.
Why it's wrong here
This order is incorrect because you cannot monitor a migration task that hasn't been created yet. The migration task must be created first, then monitoring begins.
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