system is just another account with administrative privs (
by default cannot start/shut databases)
"The Oracle user SYS owns all base tables and user-
accessible views of the data dictionary. Therefore, no
Oracle user should ever alter (update, delete, or insert)
any rows or schema objects contained in the SYS schema,
because such activity can compromise data integrity. The
security administrator should keep strict control of this
"When a database is created, the user SYSTEM is also
automatically created and granted the DBA role.
The SYSTEM username is used to create additional tables and
views that display administrative information, and internal
tables and views used by various Oracle options and tools.
Never create in the SYSTEM schema tables of interest to
Is This Answer Correct ?
Other Oracle General Interview Questions
10. Display the client number, order date and shipping date
for all orders where the shipping date is between three and
six months after the order date.