What is required to disable Database Vault in Autonomous Database?

Disabling Database Vault in Oracle Autonomous Database requires the Autonomous Instance to be restarted. This requirement is in place to ensure that the changes take full effect. When Database Vault is disabled, it affects the security context and policies that are enforced by the service. Restarting the Autonomous Instance allows for a clean state where these settings can be appropriately applied, reflecting the current configuration.

Options stating that no specific actions or restrictions are needed do not account for the need for a restart, which is a critical step in this process. Additionally, while some database settings can be altered dynamically, the modification of security features like Database Vault typically necessitates a restart to ensure all dependent services are updated accordingly. Therefore, the correct answer highlights the essential operational step involved in properly disabling Database Vault.