单项选择题
A. Check the alert log file
B. Query the V$FLASHBACK_DATABASE_LOG view
C. Query the V$RECOVERY_FILE_DEST_SIZE view
D. Query the V$FLASHBACK_DATABASE_STAT view
E. Check the value assigned for the UNDO_RETENTION parameter
多项选择题 You performed the RMAN database backup with the KEEP option.Which two statements are true about this backup?（） (Choose two)
多项选择题 You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN). Which two are the prerequisites to perform this operation? （）(Choose two)
单项选择题 Your database is running in ARCHIVELOG mode. You are performing a user-managed backup of the DATA1 tablespace. You place the DATA1 tablespace in backup mode by issuing the following statement： ALTER TABLESPACE data1 BEGIN BACKUP； While you are performing the backup， an error occurs that causes the instance to terminate abnormally. Which statement about the DATA1 tablespace is true？（）