⟩ Can you explain What are the roles and user accounts created automatically with the database?
DBA - role Contains all database system privileges.
SYS user account - The DBA role will be assigned to this
account. All of the basetables and views for the
database's dictionary are store in this schema and are
manipulated only by ORACLE.
SYSTEM user account - It has all the system privileges for
the database and additional tables and views that
display administrative information and internal tables and
views used by oracle tools are created using this username.
