Q2. Which three statements are true about the Oracle Data Dictionary?

Q2. Which three statements are true about the Oracle Data Dictionary? (Choose three.)

• (A). Data dictionary views are created by joins of dictionary base tables and DBA-defined tables

• (B). The data dictionary is created and maintained by the database administrator
• (C). Views with the same name but different prefixes, such as CDB, DBA, ALL and USER, reference the same base tables from the data dictionary
• (D). Base tables can be queried directly
• (E). It is owned by the SYSTEM user

• (F). Usernames of all users including database administrators are stored in the data dictionary