单选题You specified extent management as local for a tablespace. How will it affect space management in the tablespace？（）A All the extents will be of the same size.B Bitmap will be used to record free and allocated extents.C Free extents will be managed by t

第1题：

You are creating a locally managed tablespace to meet the following requirements： All the extents should be of the same size.  The data should be spread across two data files.  A bitmap should be used to record the free space within the allocated extents. Which three options would you choose？（）

• A、set PCTFREE and PCTUSED to 50
• B、specify extent allocation as Uniform
• C、specify extent allocation as Automatic
• D、create the tablespace as bigfile tablespace
• E、create the tablespace as smallfile tablespace
• F、set segment space management to Automatic
• G、use the RESIZE clause while creating the tablespace

第2题：

Which two statements about bigfile tablespaces are true？ （）

• A、The bigfile tablespace have only one data file.
• B、The segment space management is automatic.
• C、The extent management is dictionary managed.
• D、The database can have only one bigfile tablespace.
• E、The bigfile tablespace can be converted to a smallfile tablespace.

第3题：

Your database is running under automatic undo management and the UNDO_RETENTION parameter is set to 900 sec. You executed the following command to enable retention guarantee：  SQL> ALTER TABLESPACE undotbs1 RETENTION GUARANTEE;  What effect would this statement have on the database？（）

• A、The extents in undo tablespace retain data until the next full database backup.
• B、The extents containing committed data in the undo tablespace are never overwritten.
• C、The extents which no longer contain uncommitted data in the undo tablespace are not overwritten for at least15 minutes.
• D、The extents containing committed data in the undo tablespace are not overwritten until the instance  is shut down.

第4题：

You executed the following command to create a tablespace called SALES_DATA： SQL> CREATE TABLESPACE sales_data DATAFILE SIZE 100M SEGMENT SPACE MANAGEMENT AUTO； Which two statements are true about the SALES_DATA tablespace（）

• A、The database automatically determines the extent-sizing policy for the tablespace.
• B、The segments are automatically shrunk when the contents are removed from them.
• C、The allocation of extents within the tablespace is managed through the dictionary tables.
• D、The space utilization description of the data blocks in segments is recorded in bitmap blocks.
• E、The space utilization description of the data blocks in segments is managed through free lists.

第5题：

Examine the statement：   SQL> CREATE TABLESPACE user_data  2> EXTENT MANAGEMENT LOCAL  3> SEGMENT SPACE MANAGEMENT AUTO；   Which twp assumptions must be true for this statement to execute successfully？（）

• A、Oracle Managed Files are used for this instance.
• B、The USER_DATA tablespace is managed using FET$/UET$ tables.
• C、The COMPATIBLE initialization parameter must be 9.0.0 or higher.
• D、Space within segments in the USER_DATA tablespace is managed with freelists.

第6题：

You specified extent management as local for a tablespace. How will it affect space management in the tablespace？（）

• A、All the extents will be of the same size.
• B、Bitmap will be used to record free and allocated extents.
• C、Free extents will be managed by the data dictionary tables.
• D、The tablespace will be system managed and the users cannot specify the extent size.

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第13题：

Evaluate the following command and its output：   SQL>SELECT * FROM dba_temp_free_space；  TABLESPACE_NAME TABLESPACE_SIZE ALLOCATED_SPACE FREE_SPACE  LMTEMP 250609664 101048576 149561088 Which two statements correctly interpret the output？（）

• A、 FREE_SPACE indicates only the space that is currently unallocated.
• B、 ALLOCATED_SPACE indicates only the space currently allocated and in use.
• C、 FREE_SPACE indicates only the space that is currently allocated and available for reuse.
• D、 ALLOCATED_SPACE indicates both the space currently allocated and used，and the space that is available for reuse.
• E、 FREE_SPACE indicates both the space that is currently allocated and available for reuse，and the space that is currently unallocated.

第14题：

You want to be notified when the space usage of an existing critical tablespace has reached 75% of the allocated space. Which option would you use to achieve this？（）

• A、run a procedure to check the tablespace space usage
• B、define the warning threshold for the tablespace at 75% in Database Control
• C、create a trigger to be executed when tablespace space usage reaches 75%
• D、submit a job by using DBMS_JOB package to check the free space in the tablespace at regular intervals
• E、define the warning threshold to be 75% for the tablespace by ALTER TABLESPACE .. ADD THRESHOLD command

第15题：

You specified segment space management as automatic for a tablespace. What effect would this have on space management？（）

• A、Extents would be managed by the freelists.
• B、The segment would be managed by bitmaps.
• C、The segment would be managed by the freelists.
• D、Free space would be managed by the data dictionary.

第16题：

Examine the commands executed in a DBA session：SQL> CREATE BIGFILE TABLESPACE MRKT 2 DATAFILE ’/u01/app/oracle/oradata/orcl/mrkt.dbf’ size 10M LOGGING 3 EXTENT MANAGEMENT LOCALSEGMENT SPACE MANAGEMENT AUTO； Tablespace created. SQL> ALTER DATABASE DEFAULT TABLESPACE MRKT； Database altered.  Which two statements are trueregarding the MRKT tablespace（）

• A、No more data files can be added to the tablespace.
• B、Segment space is managed by free lists in the tablespace.
• C、A user created without being assigned a default tablespace uses this tablespace.
• D、The tablespace can be dropped with the current setting with segments present in it

第17题：

You executed the following command to create a tablespace called SALES_DATA：  > CREATE TABLESPACE sales_data DATAFILE SIZE 100M SEGMENT SPACE MANAGEMENT AUTO；  Which two statements are true about the SALES_DATA tablespace （）

• A、The database automatically determines the extent-sizing policy for the tablespace.
• B、The segments are automatically shrunk when the contents are removed from them.
• C、The allocation of extents within the tablespace is managed through the dictionary tables.
• D、The space utilization description of the data blocks in segments is recorded inbitmapblocks.
• E、The space utilization description of the data blocks in segments is managed through free lists.MANUAL

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