Final answer:
The 'snc_internal' role is not granted to all existing users by default in the sys_user table; this statement is false. Roles are usually assigned based on specific criteria by administrators.
Step-by-step explanation:
The question asks whether the snc_internal roles are granted to all existing users in the sys_user table. The assumption that all existing users are granted a specific role, such as snc_internal, by default, is false. In most systems, roles are explicitly granted to users based on their job function, need for access, or other criteria set by the system administrators or developers. It is not a common practice to grant all users a specific role as it can lead to security risks. For example, in ServiceNow, roles like snc_internal are typically reserved for special functions or administrative users, and not granted to all users by default.