Your&ensp;database&ensp;operates&ensp;...

单项选择题X 纠错

Your database operates in ARCHIVELOG mode. Usermanaged consistent backups are performed every Sunday night.
On Tuesday， client A drops a table at 8：00 a.m. as follows：
SQL> DROP TABLE cust_ord PURGE;
Table dropped.
Client B executes a query at 9：00 a.m. on the same table as follows：
SQL> SELECT * FROM cust_ord;
SELECT * FROM cust_ord
*
ERROR at line 1：
ORA00942： table or view does not exist
Client B needs the dropped table and reports the problem to you. With reference to this scenario， which action should you take？（）

A.retrieve the table by using the flashback feature
B.restore all the data files from last Sunday’s backup， and then perform a timebased recovery
C.restore all the data files from last Sunday’s backup， and then perform a log sequence recovery
D.restore all the data files from last Sunday’s backup， and then perform a cancelbased recovery
E.restore from last Sunday’s backup only data files that belong to the tablespace in which the table was stored， and then perform a complete recovery

参考答案：

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多项选择题

You are connected to Recovery Manager （RMAN） without a recovery catalog. There is no copy of the control file available. You want to restore the control file from an autobackup. To retrieve the autobackup，you need the database ID （DBID）.
In which two sources would you find the DBID？（）

A.the trace file
B.the alert log file
C.an RMAN session log file
D.the server parameter file
E.the formatted name of a control file autobackup

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多项选择题

You used the following command in Recovery Manager （RMAN） as part of the recovery process： RESTORE CONTROLFILE FROM AUTOBACKUP;
How does RMAN find the control file autobackup？（）

A.by using the trace file
B.by using the alert log file
C.by using the database ID
D.by using the server parameter file
E.by using the V$CONTROLFILE view
F.by using the autobackup format configuration setting

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多项选择题

In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog and restored the control file by using the following command： RMAN> RESTORE CONTROLFILE;
Which two operations do you need to perform after restoring the control file from backup？（）

A.shut down and restart the instance
B.add new tempfiles to the temporary tablespaces after recovery
C.perform a media recovery and open the database with the RESETLOGS option
D.perform a media recovery and bring the database to NOARCHIVELOG mode

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单项选择题

In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog. The following commands are used in the process of recovering the database by using the backup control file：
In what sequence would you use this process to perform the recovery？（）

A.7， 2， 3， 1， 4， 6， 5
B.7， 1， 3， 2， 6， 5， 4
C.2， 1， 7， 6， 3， 5， 4
D.2， 7， 3， 5， 1， 6， 4

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单项选择题

The loss of the control file forced you to recreate the control file. After recreating it and opening the database， you find that some of the data files are named as MISSINGnnnnn， where nnnnn is a fivedigit number starting with 0.
What could be the possible reason？（）

A.These are the data files that are corrupted.
B.There is no SYSAUX tablespace in your database
C.There is a readonly tablespace in your database.
D.These are the data files that cannot be recovered.

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单项选择题

You have a readonly tablespace on readonly media. You want to perform a media recovery on the existing data files， but using a backup control file. The backup control file indicates that the status of the readonly tablespace was read/write when the control file was backed up. What should you consider？（）

A.drop the readonly tablespace and recreate the tablespace after recovery
B.take data files from the readonly tablespace offline before performing a recovery
C.perform a recovery; status of the tablespace in control file will be changed automatically
D.recovery using backup control file is not possible， so restore all the files from the last full database backup， and then open the database

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单项选择题

One of the tablespaces is readonly in your database. The loss of all control files forced you to recreate the control file.
Which operation do you need to perform after recreating the control file and opening the database？（）

A.drop and recreate the readonly tablespaces
B.rename the readonly data files to their correct file names
C.change the tablespace status from read/write to readonly
D.recreate the readonly tablespace because it is automatically removed

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单项选择题

You lost the PRODSTD tablespace， which was read/write. The tablespace was readonly when the last backup was performed. How would you recover the tablespace？（）

A.restore the tablespace from the backup; there is no need to apply the redo information
B.restore the full database to recover the data up to the point when you performed the backup
C.restore the tablespace from the backup， and then perform a recovery using the backup control file
D.restore the tablespace from the backup， and then recover the tablespace; all the redo information from the point when the tablespace was made read/write is applied

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多项选择题

You noticed that the index tablespace in your database requires a recovery. However， instead of performing a media recovery， you decided to recreate the indexes in a new tablespace. Which two options would you use to reduce the time it takes to recreate the indexes？（）

A.ONLINE
B.REVERSE
C.PARALLEL
D.COMPRESS
E.NOLOGGING
F.COMPUTE STATISTICS

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多项选择题

You lost the index tablespace in your database. You decided to recreate the index tablespace and the indexes in the tablespace.
What methods can you use to recreate the indexes？（）

A.Data Pump
B.SQL scripts
C.SQL*Loader
D.Flashback database
E.Recovery Manager （RMAN） script

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