Which two are true about the data dictionary?
A. The SYS user owns all base tables and user-accessible views in the data dictionary.
B. All users have permissions to access all information in the data dictionary by default.
C. The data dictionary is constantly updated to reflect changes to database objects, permissions, and data.
D. All user actions are recorded in the data dictionary.
E. Base tables in the data dictionary have the prefix DBA_.
AC
https://docs.oracle.com/cd/B28359_01/server.111/b28318/datadict.htm#CNCPT1211
AE
incorrrect, you must read oracle web site
AC
A,C
AD
AD