PAS-C01 Migration Practice Question
A company is migrating a legacy application to AWS. The application currently uses Oracle Database and the company wants to migrate to Amazon Aurora PostgreSQL with minimal downtime. Which TWO steps should be taken to achieve this? (Choose TWO)
⚠ Common exam trap
Watch out — candidates often confuse 'migration steps' with 'post-migration configuration' (like Multi-AZ) or assume that a simple dump-and-load approach (Option E) can achieve minimal downtime, when in fact it requires a full outage, whereas DMS with CDC is the correct AWS-native approach for near-zero-downtime migrations.
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 the AWS Schema Conversion Tool (SCT) to convert the Oracle schema to PostgreSQL.
The AWS Schema Conversion Tool (SCT) can automatically convert Oracle database schemas (including stored procedures, views, and data types) to a PostgreSQL-compatible format, which is essential when migrating to Amazon Aurora PostgreSQL. Option D is correct because AWS DMS with ongoing replication (change data capture) allows you to keep the source Oracle database and target Aurora PostgreSQL synchronized with minimal downtime, enabling a near-zero-downtime migration by capturing and applying incremental changes.
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 the AWS Schema Conversion Tool (SCT) to convert the Oracle schema to PostgreSQL.
Why this is correct
SCT automates the conversion of Oracle schema objects to PostgreSQL-compatible format.
- ✗
Rehost the Oracle database on an Amazon EC2 instance to minimize changes.
Why it's wrong here
Rehosting does not achieve the goal of migrating to Aurora PostgreSQL; it keeps Oracle.
- ✗
Configure Amazon Aurora PostgreSQL with Multi-AZ for high availability.
Why it's wrong here
Multi-AZ is important but does not address the migration from Oracle to PostgreSQL.
- ✓
Use AWS Database Migration Service (DMS) with ongoing replication (change data capture).
Why this is correct
DMS with CDC allows minimal downtime by replicating changes continuously during migration.
- ✗
Export Oracle database as dump files and import into Aurora PostgreSQL using native tools.
Why it's wrong here
Native Oracle tools cannot directly import into PostgreSQL; schema conversion is needed.
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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.