单项选择题
A. Restore the backup copy of the tempfile from the backup media.
B. Re-create the tempfile with the create tempfile command.
C. Copy an existing tempfile from another database.
D. Re-create the tempfile with the create tablespace command.
E. Re-create the tempfile with the alter tablespace command.
多项选择题 WhichfilesarerequiredforafullrecoveryofthedatabaseinARCHIVELOGmode？（）
多项选择题 Whatmethodsofpoint-in-timerecoveryareavailable？（）
单项选择题 Which are the correct steps， in order， to deal with the loss of an online redo log if the database has not yet crashed？（） a. Issue a checkpoint. b. Shut down the database. c. Issue an alter database open command to open the database. d. Startup mount the database. e. Issue an alter database clear logfile command. f. Recover all database datafiles.