Which two are true about database roles in an Oracle Data Guard configuration?

A Physical Standby Database can indeed be converted into a Logical Standby Database, providing

flexibility in a Data Guard configuration. This allows for the database to switch roles and supports SQL

apply operations, enabling more granular control over the data and transactions being replicated and

applied. Additionally, having a configuration with a primary database and one or more physical

standby databases allows for rolling upgrades to be performed. This means that each database in the

Data Guard configuration can be upgraded in a phased manner, minimizing downtime and ensuring

high availability during the upgrade process​​​​.