Which two statements describe data dictionary views?
A.
They are stored in the SYSTEM tablespace.
B.
They are based on virtual tables.
C.
They are owned by the SYS user.
D.
They speed up query and data manipulation language (DML) operations.
E.
The VSFIXED_TABLEview can be queried to list the names of these views.
Explanation:
https://docs.oracle.com/database/121/CNCPT/datadict.htm#CNCPT1210