Which activity is audited by default and recorded in the operating system audit trail irrespective of whether or
not database auditing is enabled?
A.
execution of SQL statements by users connected with the SYSDBA privilege
B.
creation of a fine-grained audit policy
C.
configuration of unified auditing mode
D.
usage of the AUDIT statement
Explanation:
https://docs.oracle.com/cd/B28359_01/network.111/b28531/auditing.htm#DBSEG0622