Q338. The database has never been backed up Examine these commands and output RMAN>SHOW ALL; CONFIGURE RETENTION POLICY TO REDUNDANCY1: defau⊥t CONFIGURE BACKUP OPTIMIZATION OFF; CONFIGURE CONTROLFILE AUTOBACKUP ON RMAN> BACKUP DATABASE channel ORA DISK 1: backup set complete, elapsed time: 00: 00: 03 RMAN>CONFIGURE BACKUP OPTIMIZATION ON; new RMAN configuration parameters are successfully stored RMAN> CREATE TABLESPACE hrtbs DATAFILE "/u01/app/hrtbs.dbf・SIZE 10M; Statement processed Now, examine this command and response RMAN> BACKUP DATABASE backup set complete, elapsed time: 00: 00: 03 Which three are true about the second backup and its effects?