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PAS-C01 Migration Practice Question

A company is migrating a custom CRM application to AWS. The application uses a PostgreSQL database. Which migration approach minimizes downtime?

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 (CDC).

AWS Database Migration Service (DMS) with ongoing change data capture (CDC) enables near-zero downtime migration by continuously replicating changes from the source to the target until cutover. Options B, C, and D all require taking the source database offline for backup or export, resulting in significant downtime.

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 Database Migration Service (DMS) with ongoing replication (CDC).

    Why this is correct

    DMS with CDC allows continuous sync and minimal downtime.

  • ✗

    Use AWS Backup to create a snapshot and restore to RDS.

    Why it's wrong here

    Backup restore is not a live migration method.

  • ✗

    Take a full backup of the source database, restore to RDS for PostgreSQL, and then cut over.

    Why it's wrong here

    Full backup restore requires significant downtime.

  • ✗

    Use pg_dump to export the database and pg_restore to import into RDS.

    Why it's wrong here

    pg_dump and pg_restore require downtime.

About these practice questions

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JA

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.