单选题A database is running in ARCHIVELOG mode and regular backups are performed. A user receives the following error message . Which is the recommended sequence of operations you need to perform for the query successfully?（）A Drop the affected tablespace, r

第1题：

A database is running in ARCHIVELOG mode and regular backups are performed. A user receives the following error message . Which is the recommended sequence of operations you need to perform for the query successfully?（）

• A、Drop the affected tablespace, re-create the tablespace, restore the datafiles, and the tablespace. 
• B、Take the affected datafile offline (if not already offline), restore the damaged image of the datafile, and then bring it online. 
• C、Restart the database in MOUNT mode, restore the damaged datafile, recover the datafile and then open the database with resetlogs.
• D、Put the database in RESTRICTED mode, restore all the datafiles in the affected datafile and recover the tablespace, and then put the database in normal operational mode. 

第2题：

Your database is running in ARCHIVELOG mode. You are performing a user-managed backup of the DATA1 tablespace.  You place the DATA1 tablespace in backup mode by issuing the following statement：   ALTER TABLESPACE data1 BEGIN BACKUP；   While you are performing the backup， an error occurs that causes the instance to terminate abnormally. Which statement about the DATA1 tablespace is true？（）  

• A、 The DATA1 tablespace is automatically taken out of backup mode when the instance aborts.
• B、 If you restart the database，the DATA1 tablespace will be automatically taken out of backup mode  when the database is opened.
• C、 If you restart the database，the DATA1 tablespace will be automatically taken out of backup mode  when the database is mounted.
• D、 If you restart the database，the database will not be opened.

第3题：

第4题：

Which two statements are true regarding the database in ARCHIVELOG mode？（）

• A、You have to shut down the database to perform the backups.
• B、Archiving information is written to the data files and redo log files.
• C、You can perform complete database backups without closing the database.
• D、Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.
• E、All the previous database backups become invalid after you configure the database to ARCHIVELOG mode.

第5题：

The database is configured in ARCHIVELOG mode and regular complete database backups are taken. The loss of which two types of files may require a recovery with the RESETLOGS option？（）

• A、 Control files
• B、 Password files
• C、 Inactive online redo log file
• D、 Archived log files required to perform recovery
• E、 Newly created tablespace which is not backed up

第6题：

In order to perform Flashback Transaction Query operations， which of these steps are required？（）

• A、 Ensure that database is running with version 10.1 compatibility.
• B、 Enable Flashback Logging.
• C、 Enable Supplemental Logging.
• D、 Ensure that the database is running with version 10.0 compatibility.
• E、 Ensure that the database is in ARCHIVELOG mode.

第7题：

Your database operates in ARCHIVELOG mode and all the tablespaces are online. Due to a user error， you decided to perform an incomplete recovery. Which two tasks would you be required to perform in the recovery process？（）

• A、 open the database with the RESTRICTED option
• B、 open the database with the RESETLOGS option
• C、 recover to the required SCN only that data file in which the error occurred
• D、 recover all the data files to the same system change number （SCN）

第8题：

At database startup， you discover that one of the disks containing an index tablespace has been lost due to a media failure. A backup of the lost index tablespace is not available. You have all the necessary scripts to recreate the indexes. You need to re-create the indexes in a new index tablespace. Which action must you perform before re-creating the indexes？（）

• A、 Start the database in OPEN mode， and create a new index tablespace.
• B、 Start the database in OPEN mode， and drop the lost index tablespace from the database.
• C、Start the database in MOUNT mode， create a new index tablespace， and drop the lost index tablespace from the database.
• D、 Start the database in MOUNT mode， drop the lost index tablespace from the database， open the database， and create a new index tablespace.

第9题：

Your database is open and running in ARCHIVELOG mode. You take RMAN full backups every Sunday night. On Monday morning， while querying the user1.employees table， you receive the following error message：  01578： ORACLE data block corrupted （file # 5， block # 51） ORA-01110： data file 5：  ’/u01/app/oracle/oradata/orcl/example01.dbf’  You need to rectify the corruption while ensuring the following： The data file should remain online.  The mean time to recover （MTTR） should be minimal.  You are not using a backup control file， and all the archived logs are accessible.   Which option would you choose？（）

• A、flash back the corrupted blocks
• B、use the DBMS_REPAIR package
• C、use the RMAN TSPITR command
• D、use the RMAN BLOCKRECOVER command
• E、use the RESTORE DATABASE and RECOVER DATABASE commands
• F、investigate the time at which the corruption occurred and perform a point-in-time recovery

第10题：

Your test database is running in NOARCHIVELOG mode. Which statement is true regarding the type ofbackups that can be performed on the database（）

• A、You can perform online whole database backups.
• B、You can performofflinewhole database backups.
• C、You cannot perform schema-level export/import operations.
• D、You can perform the backup of only the SYSTEM tablespace when the database is open.