单选题The data file belonging to theSYSTEMtablespaceis corrupted and no backup of the file is available. How do you recover the data file？（）A The data file cannot be recovered.B The date file can be restored from theSYSTEMauto backup.C Take thetablespaceoffl

第1题：

Which of the following commands should be run to verify that file system /data is not corrupted?（）

• A、fsck /dta
• B、fsck datavg
• C、lqueryvg datavg
• D、stat /data

第2题：

The loss of the control file forced you to re/x7fcreate the control file. After re/x7fcreating it and opening the database， you find that some of the data files are named as MISSINGnnnnn， where nnnnn is a five/x7fdigit 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.

第3题：

第4题：

You received the following error：   ORA-01578： ORACLE data block corrupted   （file # %s， block # %s）   Which file will you check to view additional information regarding the cause of this error？（）

• A、the alert log file and the trace files
• B、 the redo log files
• C、 the control file
• D、 the change tracking file

第5题：

When performing an incomplete recover of the whole database， which data files must you restore？ （）

• A、Only the damaged or lost data files.
• B、All of the data files of the database.
• C、Only the data files belonging to the SYSTEM tablespace.
• D、The data files belonging to the SYSTEM tablespace and the damaged or lost data files.

第6题：

The data file belonging to theSYSTEMtablespaceis corrupted and no backup of the file is available. How do you recover the data file？（）

• A、The data file cannot be recovered.
• B、The date file can be restored from theSYSTEMauto backup.
• C、Take thetablespaceoffline，drop，kand re-create it.
• D、Recovery Manager （RMAN） is used to recover the data file.
• E、The ALTER DATABSE CREATE DATAFILE..commandis used to recover the data file.

第7题：

A data file become corrupted in your database due to bad sectors on the disk. Because of corruption， you lost all the important tables in that data file. Which method would you use for recovery？（）

• A、 Flash back all the tables in the data file， one by one.
• B、 Restore the data file to a new location and perform a media recovery.
• C、 Flash back the database， there is no need to restore the data file.
• D、 Restore the data file from the most recent backup and flash the database.

第8题：

A data file became corrupted in your database due to bad sectors on the disk. Because of corruption， you lost all the important tables in that data file. Which method would you use for recovery？（）

• A、flash back all the tables in the data file， one by one
• B、restore the data file to a new location and perform a media recovery
• C、flash back the database; there is no need to restore the data file
• D、restore the data file from the most recent backup and flash back the database

第9题：

View this parameter setting in your database：   DB_CREATE_FILE_DEST=’D:// /oracle/product/10.2.0/oradata/oracle’  You created a tablespace by using this command：   CREATE TABLESPACE USERS；  Which two statements are true about the USERS tablespace？（）

• A、The tablespace has two data files.
• B、An error is reported and tablespace creation fails.
• C、Data files are created with names generated by the instance.
• D、The tablespace can be extended without specifying the data file.
• E、Data files belonging to the USERS tablespace cannot be renamed.

第10题：

You issue the following statement：   SQL> SELECT FIRSTNAME， LASTNAME FROM HR.EMPLOYEE；  You receive the following error：         01578： ORACLE data block corrupted （file# 6， block # 54）        ORA-01110 ： data file 6： ’u01/oracle/oradata/data1.dbf’   How will you resolve this problem of data block corruption by reducing the mean time to recover （MTTR）？（）

• A、 by using the DBMS_REPAIR package
• B、 by using the DBVERIFY utility
• C、 by using Block Media Recovery
• D、 by issuing the ANALYZE TABLE HR.EMPLOYEES VALIDATE STRUCTURE command