单项选择题
Your database is running in NOARCHIVELOG mode with two online redo log files. The SALES table contains sales information for the organization. The SALES table belongs to the SALESTB tablespace. On Monday， you insert 10 rows into the SALES table. The current log sequence number is 14. You change the tablespace status from READ WRITE to READ ONLY for the SALESTB tablespace. You shut down the database and take a backup of the SALESTB tablespace.
On Tuesday， you start the database. You change the status for the SALESTB tablespace from READ ONLY to READ WRITE. You insert 10 more rows into the SALES table and shut down the database. The current log sequence number is 15.
When you try to open the database on Wednesday morning， you discover that the SALESTB tablespace was lost because of a media failure. Which of the following options is true about recovering the SALES table？（）
A. The SALES table cannot be recovered because the database is running in NOARCHIVELOG mode.
B. The SALES table can be recovered by restoring the SALESTB tablespace from the backup and performing a media recovery.
C. The SALES table can be recovered by restoring the SALESTB tablespace from the backup without performing any media recovery.
D. The SALES table can be recovered by restoring the SALESTB tablespace from the backup， but the rows inserted on Tuesday need to be inserted again.
相关考题
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单项选择题
Inwhichofthefollowingscenariosisatablespacerecoveryrequired？（）
A. when recovering a lost read-only tablespace from a read-only tablespace backup
B. when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in ARCHIVELOG mode
C. when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in NOARCHIVELOG mode and the changes in the online redo log files have been overwritten
D. when recovering a lost read-only tablespace from a read-only tablespace backup using the backup of the control file， the control file was created using the ALTER DATABASE BACKUP CONTROLFILE TO TRACE statement， and this statement was issued when the tablespace was read-only -
单项选择题
YourdatabaseisconfiguredinNOARCHIVELOGmode.Duetoamediafailure，youhavelostoneofthedatafilesbelongingtoaread-onlytablespace.Youknowthatthelastbackupwasperformedafterthetablespacewasmaderead-only.Whichactionshouldyoutaketorestorethemissingdatafileintheminimumamountoftime？（）
A. Restore all the datafiles from the backup.
B. Restore only the lost datafile from the backup.
C. Restore all the datafiles for the lost tablespace from the backup.
D. Restore all the datafiles for the lost tablespace and all the SYSTEM and SYSAUX datafiles from the backup. -
单项选择题
Your database is in ARCHIVELOG mode. On Friday evening， you perform an online database backup by using the BACKUP DATABASE command at the Recovery Manager （RMAN） prompt and close the database. On Monday， the System Administrator informs you about the failure of two hard disks. One of the lost disks contains two datafiles， HR1.DBF and HR2.DBF， both of which belong to a read/write tablespace named HR. The disk also contains a datafile， USERS.DBF， which belongs to a read/write tablespace named USERS. You need to restore and recover the database backup that was performed on Friday evening. After mounting the database， you issue the following RMAN commands： RMAN>RESTORE DATABASE； RMAN>RECOVER DATABASE； After successfully executing these RMAN commands， you issue the following statement using SQL*Plus： SQL>ALTER DATABASE OPEN； You receive the following errors when attempting to open the database： ORA-01157： cannot identify/lock data file 10 see DBWR trace file ORA-01110： data file 10： ’D：\USERS.DBF’ What is the cause of these errors？（）
A. The USERS.DBF datafile is corrupted and cannot be restored by RMAN.
B. The USERS.DBF datafile was not backed up using the RMAN BACKUP DATABASE command.
C. The USERS.DBF datafile was not restored using the RMAN RESTORE DATABASE command.
D. The USERS.DBF datafile was not recovered using the RMAN RECOVER DATABASE command.
