多项选择题
A. The DBWn process writes to the datafile.
B. Changes in the background process are recorded.
C. The log file is updated with the current SCN number.
D. The System Change Number （SCN） is recorded in the control file.
E. The changes to the listener configuration in the listener.ora file are recorded.
单项选择题 You are maintaining the SALES database of TeleStar Corporation. The online redo log configuration of the database is as follows： One of the redo log members， redo3b， is lost due to disk failure. How will you recover the redo log member redo3b？（）
单项选择题 YouareusingRecoverywizardforperformingincompleterecovery.WhichofthefollowingobjecttypesisNOTavailableinthePerformRecovery：Typescreen？（）
单项选择题 InwhichscenarioisaDatabaseAdministratorNOTrequiredtoperformanincompleterecovery？（）