单选题In user-managed backup and recover procedures， how are data files backed up？ （）A Using SQL commands.B Using SQL*Plus commands.C Using operating system commands.D Using Recover Manager commands.

第1题：

Your database runs in NOARCHIVELOG mode， and is backed up every night using RMAN scripts. However， last night your assistant DBA performed a manual operating system backup， instead of running the scripts. Today your database crashed and you now want to use the backups from last night. What do you need todo？（）

• A、You need to perform the restore and recover operations manually, because the backup was made manually. 
• B、First you need to resynchronize the catalog with the control file, and then you can use RMAN to recover the database. 
• C、First you need to add the backup to the catalog using the CATALOG command, and then you can use RMAN to recover the database. 
• D、You can just use RMAN and recover the database, because RMAN automatically updates the catalog with the backup information. 

第2题：

It is a holiday and no transactions are being performed on the database. You took a consistent backup of your database without using Recovery Manager （RMAN）. How would you make use of this consistent backup in RMAN？（）

• A、cannot be used in RMAN
• B、by starting up the database again
• C、by using the CATALOG command of RMAN
• D、by using the RECOVER CATALOG command in RMAN
• E、by re-creating the target control file to rebuild the RMAN repository

第3题：

You are using Enterprise Manager to schedule backups for your database.  Which type of script would begenerated by the backup scheduler（）

• A、XML script
• B、PL/SQL script
• C、Operating system scriptThis document was downloaded from =>> http：//www.amaderforum.com
• D、Recovery Manager （RMAN） script

第4题：

You plan to take a closed database backup using operating system commands. Which three SHUTDOWN options are appropriate for this type of backup？（）

• A、ABORT
• B、NORMAL
• C、IMMEDIATE
• D、TRANSACTIONAL

第5题：

You are using the backup scheduler in Enterprise Manager （EM） to schedule a backup of your database. Which type of script does the backup scheduler generate？ （）

• A、SQL script
• B、PL/SQL script
• C、Operating System （OS） script
• D、Enterprise Manager （EM） script
• E、Recovery Manager （RMAN） script

第6题：

You scheduled a backup by using the Schedule Backup option in Oracle Enterprise Manager. Which statement about the script created by Oracle Enterprise Manager is true？ （）

• A、It is a SQL script.
• B、It is a PL/SQL file.
• C、It is an operating system （OS） file.
• D、It is a Recovery Manager （RMAN） script

第7题：

Which two are characteristics of user-managed backup and recovery operations？（）

• A、Recovery is initiated using SQL*Plus.
• B、Database files are backed up using SQL commands.
• C、Database files are backed up with Recovery Manager.
• D、Database files are restored using Recovery Manager.
• E、Database files are backed up using operating system commands.

第8题：

A company has a policy that states that all servers will be fully backed up on the weekend.Additionally， all changed items will be backed up each night. In the event of a server failure， the administrator wants to be able to fully recover the system using two restore jobs. Which of the following backup levels should be used nightly？（）

• A、Incremental
• B、Normal
• C、Differential
• D、Full

第9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.

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