多选题Which two are characteristics of user-managed backup and recovery operations？（）ARecovery is initiated using SQL*Plus.BDatabase files are backed up using SQL commands.CDatabase files are backed up with Recovery Manager.DDatabase files are restored using Recovery Manager.EDatabase files are backed up using operating system commands.
多选题
Which two are characteristics of user-managed backup and recovery operations？（）
A
Recovery is initiated using SQL*Plus.
B
Database files are backed up using SQL commands.
C
Database files are backed up with Recovery Manager.
D
Database files are restored using Recovery Manager.
E
Database files are backed up using operating system commands.
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