Consider the following scenario： You have a directory， data， under the disk group tdgroupA. You want to create an alias for one of the data files and you execute the following command： ALTER DISKGROUP tdgroupA 
ADD ALIAS ’+tdgroupA/data/datafile.dbf’ 
FOR ’+tdgroupA.231.45678’； 
Which task would be accomplished by the command？（）

单项选择题You are using an Automatic Storage Management （ASM） instance to manage the files of your production database. While studying the parameter file of the ASM instance， you find the following entry：  ASM_DISKSTRING =  devices *  What could be the reason for this setting？（）

A.to enable the ASM instance to identify the alert log file
B.to enable the ASM instance to identify the server parameter file
C.to enable the ASM instance to define the locations for Oracle Managed Files （OMF）
D.to enable the ASM instance to identify all disks that can be accessed by it in the /devices directory

单项选择题You want an ASM instance to manage the files of your database. To achieve this objective， you specify the following parameters in the parameter file of the database：  INSTANCE_TYPE = RDBMS DB_NAME = PROD  LARGE_POOL_SIZE = 8MB  DB_BLOCK_SIZE = 4K  LOG_ARCHIVE_DEST = +dgroupA  LOG_ARCHIVE_FORMAT =  $ORACLE_SID_%s_%t.%t   DB_CREATE_FILE_DEST = +dgroupA  COMPATIBLE = 10.1.0.2.0  CONTROL_FILES = +dgroupA  Which parameter would be ignored while starting up the instance for the database PROD？（）

A.DB_BLOCK_SIZE
B.CONTROL_FILES
C.LARGE_POOL_SIZE
D.LOG_ARCHIVE_DEST
E.LOG_ARCHIVE_FORMAT
F.DB_CREATE_FILE_DEST

单项选择题You have many users complaining about slow inserts into a large table. While investigating the reason， you find that the number of indexes on the table is high. You want to find out which indexes are not being used.  Which method would you follow to achieve this？（）

A.enable index monitoring and query the DBA_OBJECTS view
B.enable index monitoring and query the DBA_INDEXES view
C.enable index monitoring and query the V$OBJECT_USAGE view
D.enable index monitoring and view the DBA_INDEXTYPE_COMMENTS view

多项选择题Users in your production database complain that they are getting the following error message while trying to insert rows into the ORDERS table： ERROR at line 1：  ORA-01654： unable to extend index USERS.ORDERS_IND by 8 in tablespace INDEXES  While investigating， you find that the INDEXES tablespace has run out of space and there is no more free space on the disk where the data files are available.  Which two actions could you perform to overcome this error without affecting the queries that are currently being executed？（）

A.drop and re-create the index
B.coalesce the ORDERS_IND index
C.coalesce the INDEXES tablespace
D.drop and re-create the ORDERS table
E.rebuild the index online and move it to another tablespace

单项选择题In one of your online transaction processing （OLTP） applications， most users frequently modify the values， including the key values， of the application tables. Some users generate application reports by using multiple application tables.  What is the best table structure that you can use to gain optimal performance？（）

A.heap table
B.object table
C.external table
D.clustered table
E.global temporary table
F.index-organized table （IOT）