单选题Which of the following dynamic view would you query to identify the online CURRENT redo log group？（）A V$LOGB V$LOFHISTC V$LOGFILED V$LOG_HISTORY

第1题：

Redo log files are multiplexed in your database. The disk in which you have one of the redo log members is highly fragmented. In the process of defragmentation you lose the redo log member， which is not a member of the current group. How would you recover from the loss of the redo log member？（）

• A、SMON would automatically restore the lost file.
• B、You would need to restore the whole database from the last backup.
• C、You would need to restore the file from the last full database backup.
• D、You would need to use flashback technology to restore the lost redo log member.
• E、You would need to use Recovery Manager （RMAN） to restore the lost redo log member.
• F、You would need to restore the missing log file by copying one of the remaining files from the same group.

第2题：

You executed the following command to start the database：  SQL> STARTUP  ORACLE instance started.  Total System Global Area 281018368 bytes  Fixed Size 789000 bytes  Variable Size 229635576 bytes  Database Buffers 50331648 bytes  Redo Buffers 262144 bytes ORA-00205： error in identifying controlfile， check alert log for more info  Which view would you query at this stage to investigate this missing control file？（）

• A、V$INSTANCE
• B、V$CONTROLFILE
• C、DBA_CONTROL_FILES
• D、V$DATABASE_PROPERTIES
• E、V$CONTROLFILE_RECORD_SECTION

第3题：

You are maintaining the SALES database for an organization. You have enabled the Flashback Database feature and want to estimate the flashback space required for future operations.  Which view would you query to estimate the flashback space required？（）

• A、 V$DATABASE
• B、 V$FLASHBACK_DATABASE_STAT
• C、 V$FLASHBACK_DATABASE_LOG
• D、 V$RECOVERY_FILE_DEST

第4题：

You are maintaining your database in Oracle10g. You have set the value of the STATISTICS_LEVEL initialization parameter to TYPICAL and the value of the FAST_START_MTTR_TARGET parameter to 900 seconds. To increase the performance of the database， you want to determine the log file size that should equal the minimum size of all the online redo log files. Which column will enable you to perform the desired task？（）

• A、 the WRITES_LOGFILE_SIZE column of the V$INSTANCE_RECOVERY view
• B、 the column of the V$INSTANCE_RECOVERY view
• C、 the OPTIMAL_LOGFILE_SIZE column of the V$INSTANCE_RECOVERY view
• D、 the LOG_FILE_SIZE_REDO_BLKS column of the V$INSTANCE_RECOVERY view

第5题：

You are required to flashback your database. You want to find the amount of flashback data generated since the database was opened. Which task will you perform to obtain the required information？（）

• A、 Query the V$FLASHBACK_DATABASE_LOG view.
• B、 Query the V$FLASHBACK_DATABASE_STAT view.
• C、 Check the value of the DB_FLASHBACK_RETENTION_TARGET initialization parameter.
• D、 Query the V$RECOVERY_FILE_DEST view.

第6题：

Your database is in ARCHIVELOG mode. You have two online redo log groups each of which contains one redo member. When you attempt to start the database， you receive the following errors：   ORA-00313： open failed for members of log group 1 of thread 1   ORA-00312： online log 1 thread 1： ’D:///REDO01.LOG’   You discover that the online redo log file of the current redo group is corrupted.  Which statement should you use to resolve this issue？（）

• A、 SQL>ALTER DATABASE DROP LOGFILE GROUP 1；
• B、 SQL>ALTER DATABASE CLEAR LOGFILE GROUP 1；
• C、 SQL>ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1；
• D、 SQL>ALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’；

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第13题：

You recently activated a resource plan named OLTP_PLAN in your database. Several users are concurrently running long transactions. You decide to monitor the resource manager to determine if the resource allocation formulated in the OLTP_PLAN is sufficient for peak database hours. Which dynamic performance view should you use to display the CPU time consumed by all the sessions within the resource groups？（）  

• A、 V$SYSSTAT
• B、 V$SESSSTAT
• C、 V$RSRC_PLAN
• D、 V$RSRC_CONSUMER_GROUP

第14题：

You are working as a DBA at NetFx Corporation. You discover that the SCOTT schema is deleted by mistake. You decide to flash the database back to the time when the schema existed. Which view will you query to determine the estimated size of the flashback data that you require for your current target retention？（）

• A、 V$FLASHBACK_DATABASE_LOG
• B、 V$FLASHBACK_DATABASE_STAT
• C、 V$DATABASE
• D、 V$UNDOSTAT

第15题：

In the parameter file of your production database， the FAST_START_MTTR_TARGET parameter is set to 300 to optimize instance recovery. While observing the performance of the database during instance recovery， you find that the redo log files are not sized properly to support this activity. Which two sources could you use to determine the optimal size of the redo log files？（）

• A、the V$LOG view
• B、the V$DBFILE view
• C、the V$LOGFILE view
• D、the V$INSTANCE_RECOVERY view
• E、Oracle Enterprise Manager Database Control

第16题：

Which of the following views must you query to identify any corrupt data file blocks that have been detected during backup set creation？（）

• A、V$COPY_CORRUPT
• B、V$COPY_CORRUPTION
• C、V$BACKUP_CORRUPT
• D、V$BACKUP_CORRUPTION

第17题：

Which of the following dynamic view would you query to identify the online CURRENT redo log group？（）

• A、V$LOG
• B、V$LOFHIST
• C、V$LOGFILE
• D、V$LOG_HISTORY

第18题：

View the Exhibit.You executed the following command to perform a backup of the USERS tablespace： RMAN> BACKUP TABLESPACE USERS；  Which three types of files are backed up？ （）

• A、 all the data files belonging to the USERS tablespace
• B、 password file
• C、 online redo log files
• D、 the current control file
• E、 archived redo log files
• F、 the current server parameter file
• G、 data files belonging to the USERS tablespace and all the default tablespaces

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