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Which command will result in a trace file being created with the create controlfile command contained in it?
Correct Answer: B
Explanation/Reference: Explanation: ALTER DATABASE BACKUP CONTROLFILE TO TRACE Specify TO TRACE if you want Oracle Database to write SQL statements to a trace file rather than making a physical backup of the control file. You can use SQL statements written to the trace file to start up the database, re-create the control file, and recover and open the database appropriately, based on the created control file. If you issue an ALTER DATABASE BACKUP CONTROLFILE TO TRACE statement while block change tracking is enabled, then the resulting trace file will contain a command to reenable block change tracking. The trace file will also include ALTER DATABASE REGISTER LOGFILE statements for existing logfiles that reside in the current archivelog destinations. This will implicitly create database incarnation records for the branches of redo to which the logfiles apply. You can copy the statements from the trace file into a script file, edit the statements as necessary, and use the script if all copies of the control file are lost (or to change the size of the control file).