In which scenario wi...

单项选择题In which scenario will you perform a cancel-based recovery？（）

A. when a tablespace is dropped and you have only RMAN-based backup of the database
B. when a table is dropped and stored in the Recycle Bin
C. when you are required to recover an existing table to its previous state
D. when a tablespace is dropped and you have only a user-managed full backup of the database

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1.单项选择题You are maintaining the PROD database for NetFx Corporation. You have configured controlfile autobackup in your database. At 6：00 P.M. on Monday， you issue the following command： RMAN>BACKUP DATABASE； At 8：00 A.M. on Tuesday， you are unable to start the database because all the control files are missing. You decide to restore the control files from the backup by using the RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP； command. Which operation should you perform before using the RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP； command？（）

A. Start the database in the MOUNT stage.
B. Back up the control file to trace.
C. Set the DBID
D. Issue the RECOVER DATABASE command.

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2.单项选择题 In which scenario will you issue the following command？（）
SQL> RECOVER DATABASE UNTIL TIME ’2005-10-04 ： 12：09：08’ USING
BACKUP CONTROLFILE；

A. when all the control files are missing and only a binary backup of the current control file exists
B. when a multiplexed copy of the current control file is missing
C.when all the control files are missing and only a script containing the CREATE CONTROLFILE statement exists
D. when the SPFILE is missing

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3.单项选择题In which scenario will you perform an incomplete recovery？（）

A. when a table is dropped and stored in the Recycle Bin
B. when all the control files are deleted
C. when a member of a multiplexed redo log group is dropped
D. when you are required to recover a table to its previous state

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4.单项选择题 You are working as a DBA in a company. The datafiles in the database are as follows：

On Monday， you tried to start up the database but failed because all the control files were missing. You recreated the control file using the script you have created by issuing the ALTER DATABASE BACKUP CONTROLFILE TO TRACE command. What is the prerequisite for recreating the control file？（）

A. All the datafiles should be listed in the CREATE CONTROLFILE statement.
B. The DATA2.dbf and DATA3.dbf datafiles should be listed in the CREATE CONTROLFILE statement.
C. The SYSTEM01.dbf datafile should be listed in the CREATE CONTROLFILE statement.
D. The SYSAUX01.dbf datafile should be listed in the CREATE CONTROLFILE statement.

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5.单项选择题Your database is in ARCHIVELOG mode. You lost an index tablespace due to a disk failure while the database was open. You have neither a backup of the lost index tablespace nor the scripts containing the CREATE INDEX statements to recreate the indexes. Currently， several users are executing long-running queries on the database. What will happen to the ongoing activity in the database？（）

A. The queries that are currently executing will abort and an error message will be returned to the user.
B. The queries that are currently executing will execute normally but future queries will not executed.
C. Data Manipulation Language （DML） statements cannot be performed on the tables on which the indexes are based.
D. The currently executing and future queries will execute normally， but will be slower

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6.单项选择题You are maintaining your database in Oracle10g. You find that the INDEXES index tablespace should be recovered. How will you recover the index tablespace？（）

A. by using the Flashback Database feature
B. by using RMAN incomplete recovery
C. by performing a user-managed incomplete recovery
D. by dropping and re-creating the index tablespace

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7.单项选择题 You have created a password file using the following command：
ORAPWD file=d：\oracle\ora9i\orapwU01 password=change_on_install entries=3
Which of the following is true about this password file？（）

A. If the REMOTE_LOGIN_PASSWORDFILE parameter is set to SHARED in the initialization parameter file， then a maximum of three users can be granted the SYSDBA or SYSOPER privileges.
B. If the REMOTE_LOGIN_PASSWORDFILE parameter is set to EXCLUSIVE in the initialization parameter file， then a maximum of three users can be granted the SYSDBA or SYSOPER privileges.
C. If the REMOTE_LOGIN_PASSWORDFILE parameter is set to SHARED in the initialization parameter file， then the SYSDBA and SYSOPER privileges can be granted to other users as long as space in the password file is
D. If the REMOTE_LOGIN_PASSWORDFILE parameter is set to EXCLUSIVE in the initialization parameter file， then the SYSDBAand SYSOPER privileges can be granted to other users as long as space in the password file is available.

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8.单项选择题Adam is working as a Database Administrator （DBA） for TeleSoft Corporation. His database is running in the ARCHIVELOG mode. During database startup， he discovers that one of the disks crashed， resulting in the permanent loss of a read-write USERS tablespace. The USERS01.dbf datafile belongs to the USERS tablespace and is 500 MB in size. He needs to recover the USERS tablespace from the backup. While reviewing the backup details， he discovers that the most recent available backup is five days old. This backup was taken when the USERS tablespace was read-only. After correcting the hardware problem that caused the failure， what should Adam do to recover the USERS tablespace？（）

A. Restore the USERS01.dbf file from the backup， and open the database using the STARTUP command.
B. Restore the USERS01.dbf file using the RECOVER TABLESPACE command， and open the database using the ALTER DATABASE OPEN statement.
C. Restore the USERS01.dbf file from the backup， recover the USERS tablespace using the RECOVER TABLESPACE command， and open the database using the ALTER DATABASE OPEN statement.
D. Restore the USERS01.dbf file from the backup and change the status of the USERS tablespace from read-only to read-write using the ALTER TABLESPACE USERS READ WRITE statement. Then， recover the USERS tablespace using the RECOVER TABLESPACE command， and open the database using the ALTER DATABASE OPEN statement.

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9.单项选择题 Your database is in manual archive mode. Your online redo log groups are configured as follows：

You discover that DISK 3 has encountered a media failure that has resulted in a loss of all the multiplexed copies of online redo log files.
You decide to delete the REDO01C.LOG， REDO02C.LOG， and REDO3C.LOG files to prevent the LGWR background process from attempting to access these files. When you query the V$LOG dynamic view， you receive the following output：

Which sequence of statements should you use to drop the missing online redo log files from the database？（）
1. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO01C.LOG’；
2. ALTER SYSTEM SWITCH LOGFILE；
3. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO03C.LOG’；
4. ALTER SYSTEM ARCHIVE LOG GROUP 3；
5. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO02C.LOG’；
6. ALTER SYSTEM ARCHIVE LOG GROUP 1；

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

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10.单项选择题 You are operating your database in the manual archiving mode. Currently， your database is configured with the following online redo log groups and members：

You tried to drop Group 1 from the database but received the following errors：
ORA-01623： log 1 is current log for thread 1 cannot drop
ORA-00312： online log 1 thread 1：
’D：\ORACLE\ORADATA\TESTDB\REDO01a.LOG’
What might be the reason for these errors？（）

A. Group 1 is an active or current online redo log group.
B. Group 1 is an inactive online redo group that has not been archived yet.
C. The members of the Group 1 are temporarily asymmetric with the members of other groups.
D. The size of the online redo log members of Group 1 is different from the size of the members in other groups.

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