【单选题】听力原文: A trademark is a word or words, name, symbol, label, device, or picture applied to a manufacturer's or merchant's product to identify it and distinguish it from similar products sold by others. ...
【单选题】You execute the following command to perform a backup by using Recovery Manager (RMAN): RMAN> run {allocate channel c1 type sbt; backup datafile 1; } The command errors out. A part of the error me...
A.
sbt is not a valid device type.
B.
Media Management Library was not loaded.
C.
The sbt device cannot be used for data file backups.
D.
No path was defined in the ALLOCATE CHANNEL command.
E.
The channel is currently being used by another RMAN session.