Which statement about RBAC user roles on a Cisco Nexus switch is true?

On Cisco Nexus switches utilizing RBAC, if a user is assigned to multiple roles, the system typically follows a 'permit wins' logic, meaning that if any of the assigned roles grants permission for an action or command, that permission takes precedence over a deny from another role.

Predefined roles on Cisco Nexus switches are generally immutable to maintain system integrity and a baseline of operational security; only custom roles can be defined and modified.

If a user belongs to two roles, they can execute commands permuted by either role, as permissions are typically additive, not limited to commands permuted by only one specific role.

On a Cisco Nexus 7000 Series Switch, VDCs (Virtual Device Contexts) provide administrative and resource isolation, meaning that roles, users, and configurations are typically separate and not shared between VDCs.