单项选择题

What is the impact of the results of the output of the ……

What is the impact of the results of the output of the following command？（）
RMAN> report unrecoverable database；
Report of files that need backup due to unrecoverable operations
File Type of Backup Required Name
4 full or incremental C：\ORACLE\ORADATA\ORCL\USERS01.DBF

A. There are no backup sets with any backups of the users01.dbf datafile.
B. The users01.dbf datafile has had unrecoverable operations occur in it. It will need to be backed up or some data loss is possible during a recovery.
C. The users01.dbf datafile is corrupted.
D. The users01.dbf datafile backup exceeds the retention criteria.
E. The last backup of the users01.dbf datafile failed and must be rerun.

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单项选择题Whatviewmightyouusetotrytodeterminehowlongaparticularbackupwilltake？（）

A. V$SESSION_EVENT
B. V$SESSION
C. V$WAITS
D. V$WAITSTAT
E. V$SESSION_LONGOPS

单项选择题In what view are you likely to see the following output？（） SID SERIAL# EVENT SECONDS_IN_WAIT 121 269 RMAN backup &&ensp;recovery I O 2 129 415 SQL*Net message from client 63 130 270 SQL*Net message from client

A. V$SESSION_EVENT
B. V$SESSION
C. V$WAITS
D. V$WAITSTAT
E. V$SYSSTAT

单项选择题What is the impact of the following backup if it exceeds the duration allowance？（） Backup as compressed backupset duration 2：00 partial minimize load database ；

A. The entire backup will fail.It will not be usable for recovery.
B. The entire backup will failbut any datafile successfully backed up will be usable for recovery.
C. If this backup fails，subsequent backups will prioritize datafiles not backed up.
D. If this backup fails，an error will be raised and any other commands will not be executed.
E. If this backup fails，no error will be raised and any other commands will be executed.

单项选择题How long will this backup be allowed to run？（） Backup as compressed backupset duration 2：00 minimize load database

A. 2 minutes
B. 2 hours
C. 2 days
D. The command will generate an error.
E. This backup is not constrained by any time limitation.

单项选择题Ifabackupsetisexpired，whatcanyoudotocorrecttheproblem？（）

A. Change the retention criteria.
B. Make the lost backup set pieces available to RMAN again.
C. Run the crosscheck command to correct the location for the backup set piece contained in the metadata.
D. Nothing. The backup set piece is lost forever.
E. Call Oracle support，their assistance is required.