You performed an incremental level 0 backup of a database:RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE;To enable block change tracking after the incremental level 0 backup, you issued this command:SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’;To perform an incremental level 1 cumulative backup, you issued this command:RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;Which three statements are true?()
A. Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.
B. The change tracking file must always be backed up when you perform a full database backup.
C. Block change tracking will always reduce I/O performed during cumulative incremental backups.
D. More than one database block may be read by an incremental backup for a change made to a single block.
E. The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.
第1题:
A.ThebackupperformedonSundayscontainsalltheblocksthathaveeverbeenusedinthedatabase.
B.ThebackupperformedonSundayscontainsalltheblocksthathavechangedsincethelastlevel1backup.
C.Thebackupperformedoneachworkingdaycontainsalltheblocksthathavechangedsincethelastlevel0 backup.
D.ThebackupperformedonMondaycontainsalltheblocksthathavechangedsincethelevel0backup,and everyotherworkingdaycontainsalltheblocksthathavechangedsincethelevel1backup
第2题:
A.V$BACKUP_CORRUPTION
B.V$COPY_CORRUPTION
C.V$DATABASE_BLOCK_CORRUPTION
D.RC_BACKUP_CORRUPTION
第3题:
A.Full
B.Compressed
C.Copy
D.Differential
E.Incremental
第4题:
A.ThecodewillrunabackupvalidationtopopulatetheV$BACKUP_CORRUPTIONviewandrepaircorruptblocks,ifany,recordedintheview.
B.ThecodewillrunabackupvalidatetopopulatetheV$COPY_CORRUPTIONviewandthenrepairanycorruptblocksrecordedintheview.
C.ThecodewillrunsabackupvalidatetopopulatetheV$DATABASE_BLOCK_CORRUPTIONviewandthenrepaircorruptblocks,ifany,recordedintheview.
D.ThecodewillrunabackupvalidatetopopulatetheRC_BACKUP_CORRUPTIONviewandthenrepaircorruptblocks,ifany,recordedintheview.
第5题:
YouaremanaginganOracleDatabase11gdatabasewiththisbackupstrategy:-EverySundaynight,level0backupisperformed.-OnMondaynightandsubsequentdays,level1incrementalbackupisperformed.Thebackupsarenotcumulativeincremental.WhichstatementaboutMonday’sbackupistrue()
A.Thebackupcontainsalltheusedblocks.
B.Thebackupcontainsalltheusedandunusedblocks.
C.Thebackupcontainsblocksthathavechangedsincethelastlevel0backup.
D.Thebackupcontainsblocksthathavechangedsincethelastlevel1backuptakenlastweek.