多选题Your database is in NOARCHIVELOG mode. After which two operations you should take the backup of control file？（）Aadding a new user to the databaseBdropping a user from the databaseCdropping a table from the databaseDdropping a data file from a tablespaceEadding a new tablespace to the database
多选题
Your database is in NOARCHIVELOG mode. After which two operations you should take the backup of control file？（）
A
adding a new user to the database
B
dropping a user from the database
C
dropping a table from the database
D
dropping a data file from a tablespace
E
adding a new tablespace to the database
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