Which AWS service or tool should be used to migrate an on-premises PostgreSQL database to Amazon RDS?
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Correct answer: AWS Database Migration Service (AWS DMS).
Why this is the answer
AWS Database Migration Service (AWS DMS) is the correct choice because it is specifically designed for migrating databases quickly and securely. It supports homogeneous migrations (e.g., PostgreSQL to Amazon RDS for PostgreSQL) and heterogeneous migrations (e.g., Oracle to Amazon RDS for PostgreSQL). AWS DMS keeps the source database operational during the migration, minimizing downtime. Cloud Adoption Readiness Tool (CART) is used for assessing an organization's readiness for cloud adoption, not for database migration. AWS Migration Hub provides a central location to track the progress of migrations, but it doesn't perform the migration itself. AWS Application Migration Service (AWS MGN) is used for migrating physical servers, virtual machines, and cloud instances to AWS, not specifically for database content.
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