多选题You decided to increase the value for the SHARED_SERVERS parameter by using the following command：  SQL ALTER SYSTEM SET SHARED_|SERVERS=3 SCOPE=？；  Which three values can be specified for the SCOPE clause？（）AALLBPFILECBOTHDNONEESPFILEFMEMORYGINSTANCEH

第1题：

You have specified the warning and critical threshold values of an application tablespace to be 60% and 70% respectively. From the tablespace space usage metrics， you find that the actual space usage has reached the specified warning threshold value， but no alerts have been generated. What could be the reason for this？（）

• A、 The EVENT parameter was not set
• B、 The SQL_TRACE parameter is set to FALSE
• C、 The Enterprise Manager Grid Control is not used
• D、 The STATISTICS_LEVEL parameter is set to BASIC
• E、 The TIMED_STATISTICS parameter is set to FALSE

第2题：

You decided to change the location of the flash recovery area. You executed the following command：   ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’+disk1’ SCOPE=BOTH SID=’*’；   Which statement is true？（）

• A、 The location can be changed only if the flash recovery area is empty.
• B、 After executing the command， all new flash recovery area files will be created in the new location.
• C、 The command will generate an error because you cannot change the flash recovery area while the database is open.
• D、 All the existing files in the flash recovery area will be moved to the new location and all new Flash Recovery Area files will be created in the new location.

第3题：

第4题：

our database instance is started using the server parameter file （SPFILE）. You executed a command tochange the value of the LOG_BUFFER initialization parameter：ALTER SYSTEM SET LOG_BUFFER=32M SCOPE=BOTH； What would be the outcome of this command（）

• A、The command succeeds only if Automatic Memory Management is not enabled.
• B、The command succeeds， but you need to restart the database for changes to take effect.
• C、The command returns an error because the size of the redo log buffer cannot be changed dynamically.
• D、The parameter value is changed and it comes into effect as soon as space becomes available in theSystem Global Area （SGA）

第5题：

You have joined a new organization as a Database Administrator. The Security Administrator in your organization has kept human errors， such as erroneously dropping users， tables， and important data， to a minimum by carefully granting only the necessary privileges to each user. As a result of several ongoing transactions within your database， you discover that the flashback logs are rapidly increasing in the flash recovery area. To avoid out-of-space errors， you decide to delete the flashback logs from the flash recovery area. How can you delete the flashback logs from the database if your database is up and running？（）

• A、 Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.
• B、 Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement while the database is up and running.
• C、 Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.
• D、 Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.

第6题：

You have a range-partitioned table in your database. Each partition in the table contains the sales data for a quarter.  The partition related to the current quarter is modified frequently and other partitions undergo fewer data manipulations. The preferences for the table are set to their default values. You collect statistics for the table using the following command in regular intervals： SQL> EXECUTE  DBMS_STATS.GATHER_TABLE_STATS（’SH’，’SALES’，GRANULARITY=>’GLOBAL’）；   You need statistics to be collected more quickly.  What can you do to achieve this？（）

• A、 Set DYNAMIC_SAMPLING to level 4
• B、 Set the STATISTICS_LEVEL parameter to BASIC
• C、 Set the INCREMENTAL value to TRUE for the partition table
• D、 Increase the value of STALE_PERCENT for the partition table

第7题：

You have specified the warning and critical threshold values of an application tablespace to be 60% and 70%， respectively. From the tablespace space usage metrics， you find that the actual space usage has reached the specified warning threshold value， but no alerts have been generated. What could be the reason for this？（）

• A、The EVENT parameter was not set.
• B、The SQL_TRACE parameter is set to FALSE
• C、The Enterprise Manager Grid Control is not used.
• D、The STATISTICS_LEVEL parameter is set to BASIC
• E、The TIMED_STATISTICS parameter is set to FALSE

第8题：

You issued the following statement：   SQL> ALTER SESSION SET NLS_LANG=FRENCH_CANADA.WE8ISO8859P1；   Which parameter is NOT overridden by using the above statement？（）  

• A、 the value of the NLS_LANGUAGE variable
• B、 the value of the NLS_TERRITORY variable
• C、 the value of the NLS_CURRENCY variable
• D、the character encoding scheme used by the client application

第9题：

Your database instance is started using the server parameter file （SPFILE）. You executed acommand to change the value of the LOG_BUFFER initialization parameter： ALTER SYSTEM SET LOG_BUFFER=32M SCOPE=BOTH；  What would be the outcome of this command（）

• A、The command succeeds only if Automatic Memory Management is not enabled.
• B、The command succeeds， but you need to restart the database for changes to take effect.
• C、The command returns an error because the size of the redo log buffer cannot be changed dynamically.
• D、The parameter value is changed and it comes into effect as soon as space becomes available in the System Global Area （SGA）.

第10题：

You are working as a DBA in an organization. The flash recovery area files are created in ’+disk1’. You want to create new flash recovery area files in the ’+disk2’ location. The new location of the flash recovery area files should be written in the control file and the spfile.Which command will you issue to change the location of the flash recovery area files？（）  

• A、 ALTER SYSTEM SET DB_RECOVERY_FILE_DEST = ’+disk2’ ；
• B、 ALTER SYSTEM SET DB_RECOVER_FILE_DEST = ’+disk2’ SCOPE = BOTH；
• C、 ALTER SYSTEM SET DB_CREATE_FILE_DEST = ’+disk2’；
• D、 ALTER SYSTEM SET DB_CREATE_ONLINE_LOG_DEST_n = ’+disk2’；