Final answer:
The Cloud Practitioner or the person responsible for managing the DynamoDB table is responsible for configuring and performing backups for point-in-time recovery (PITR).
Step-by-step explanation:
The responsibility for configuring and performing backups for point-in-time recovery (PITR) of an Amazon DynamoDB table lies with the Cloud Practitioner or the person or team responsible for managing the DynamoDB table.
DynamoDB provides a feature called continuous backups, which automatically backs up the data in the table, including point-in-time recovery.
To enable continuous backups, the Cloud Practitioner can use the AWS Management Console, AWS Command Line Interface (CLI), or AWS SDKs to configure the backup settings for the DynamoDB table.