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A data file on one of your physical standby databases has been accidentally deleted and you must restore and recover it. All the archive logs required for recovery are still on disk in the directory pointed to by the log_archive_dest_1 parameter. Which three steps must be performed to restore the missing file and recover the standby database while it is in the MOUNT state? (Choose three.)
Correct Answer: C,D,E
Explanation/Reference: Explanation: Recovery from Loss of Datafiles on the Standby Database 1. Connect SQL*Plus to the standby database. 2. Stop Redo Apply using the SQL ALTER DATABASE ... statement. 3. In a separate terminal, start RMAN and connect to both the standby and recovery catalog databases (use the TARGET keyword to connect to the standby instance). 4. Issue the following RMAN commands to restore and recover datafiles on the standby database: RESTORE DATAFILE <n,m,...>; RECOVER DATABASE; 5. To restore a tablespace, use the RMAN 'RESTORE TABLESPACE tbs_name1, tbs_name2, ...' command. 6. At the SQL*Plus prompt, restart Redo Apply using the SQL ALTER DATABASE ... statement. References: https://docs.oracle.com/cd/E11882_01/server.112/e41134/rman.htm