单项选择题
A.ALTER USER B.ALTER DATABASE C.ALTER SYSTEM D.GRANT
Youareattemptingtoclearanunarchivedredologfile.Inordert...
单项选择题You are attempting to clear an unarchived redo log file. In order to manually enact a log switch, which of the following statements is appropriate?（）
A.ALTER DATABASE B.ALTER SYSTEM C.ALTER USER D.ALTER REDO LOG
Youareanalyzingthecomponentsoftheredologmechanismsinyou...
单项选择题You are analyzing the components of the redo log mechanisms in your Oracle database. Which of the following purposes does the CKPT process serve?（）
A.Writes buffers to disk B.Writes current redo log number to datafile headers C.Writes redo log information to disk D.Reads information into memory for users
TheDBAisdefiningroleforusers.Whichofthefollowingisnotan...
单项选择题The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?（）
A.ALTER USER DEFAULT ROLE ALL B.ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1 C.ALTER USER DEFAULT ROLE NONE D.ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1
