多选题You issued the following command：        SQL> DROP TABLE MYTABLE；        SQL> SHOW RECYCLEBIN  The following output is returned：        ORIGINAL NAME RECYCLEBIN NAME               OBJECT TYPE      DROP TIME        ------------- ------------------------

第1题：

删除PRIMARYKEY约束条件及其所有依赖约束条件的语法是什么（）

• A、ALTER TABLE table_name DROP CONSTRAINT constraint_name CASCADE
• B、ALTER TABLE table_name DROP CONSTRAINT FOREIGN KEY CASCADE
• C、DROP CONSTRAINT table_name（constraint_name）
• D、ALTER TABLE table_name DROP CONSTRAINT constraint_name

第2题：

The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema. Which two statements are true regarding the outcome of this action? （）(Choose two)

• A、All the related indexes and views are automatically dropped
• B、The flashback drop feature can recover only the table structure
• C、Only the related indexes are dropped whereas views are invalidated
• D、The flashback drop feature can recover both the table structure and its data

第3题：

You accepted the recommended SQL Profile by executing the following code：   DECLARE   sqlprofile_name varchar2（30）；  BEGIN   sqlprofile_name ：= DBMS_SQLTUNE.ACCEPT_SQL_PROFILE（  task_name => ’my_task’，   profile_name => ’my_profile’）；   END；   Which advisor will analyze this profile？（）  

• A、 SQL Access Advisor
• B、 Undo Advisor
• C、 Segment Advisor
• D、 SQL Tuning Advisor

第4题：

You execute the following command to audit database activities： SQL> AUDIT DROP ANY TABLE BY scott BY SESSION WHENEVER SUCCESSFUL； What is the effect of this command（）

• A、One audit record is created for every successful DROP TABLE command executed in the session of SCOTT.
• B、One audit record is generated for the session when SCOTT grants the DROP ANY TABLE privilege to otherusers.
• C、One audit record is created for the whole session if user SCOTT successfully drops one or more tables inhis session.
• D、One audit record is created for every session of any other user in which a table owned by SCOTT isdropped successfully.
• E、One audit record is created for every successful DROP TABLE command executed by any user to drop Tables owned by SCOTT

第5题：

Examine the following commands executed in your database： SQL> ALTER SESSION RECYCLEBIN=ON； Session altered  SQL> CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees；  Table created.  Further， you executed the following command to drop the table：  SQL> DROP TABLE emp； Table dropped.  What happens in this scenario？ （）

• A、The table is moved to the SYSAUX tablespace.
• B、The table is moved to the SYSTEM tablespace.
• C、The table is removed from the database permanently.
• D、The table is renamed and remains in the TBSFD tablespace.

第6题：

The RECYCLEBIN parameter is set to ON for your database. You drop a table，PRODUCTS，from the SCOTT schema.  Which two statements are true regarding the outcome of this action？（）

• A、 All the related indexes and views are automatically dropped
• B、 The flashback drop feature can recover only the table structure
• C、 Only the related indexes are dropped whereas views are invalidated
• D、 The flashback drop feature can recover both the table structure and its data

第7题：

User A executes the following command to drop a large table in your database：SQL> DROP TABLE trans； While the drop table operation is in progress， user B executes the following command on the same table：SQL> DELETE FROM trans WHERE tr_type=’SL’； Which statement is true regarding the DELETE command（）

• A、It fails to delete the records because the records are locked in SHARE mode.
• B、It deletes the rows successfully because the table is locked in SHARE mode
• C、It fails to delete the records because the table is locked in EXCLUSIVE mode.
• D、It deletes the rows successfully because the table is locked in SHARE ROW EXCLUSIVE mode.

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第13题：

An application needs a table for each connection that tracks the ID and Name of all items previously ordered and committed within the connection. The table also needs to be cleaned up and automatically removed each time a connection is ended. Assuming the ITEMS table was created with the following SQL statement: CREATE TABLE items item_no INT, item_name CHAR(5), item_qty INT) Which of the following SQL statements will provide the table definition that meets the specified requirements?（）

• A、DECLARE GLOBAL TEMPORARY TABLE tracker AS (SELECT item_no, item_name FROM items) WITH NO DATA ON COMMIT PRESERVE ROWS ON DISCONNECT DROP TABLE
• B、DECLARE GLOBAL TEMPORARY TABLE tracker AS (SELECT item_no, item_name FROM items) WITH NO DATA ON COMMIT PRESERVE ROWS
• C、CREATE TABLE systmp.tracker AS (SELECT item_num, item_name FROM items) WITH NO DATA ON COMMIT PRESERVE ROWS
• D、CREATE TABLE tracker AS (SELECT item_num, item_name FROM items) ON COMMIT PRESERVE ROWS ON DISCONNECT DROP TABLE

第14题：

What is the net effect of the following command？（）   alter diskgroup dgroup1 drop disk abc；

• A、 The disk ABC will be dropped from the disk group. Since you did not issue a rebalance command，the data on that disk will be lost.
• B、 The command will raise an error indicating that you need to rebalance the disk group to remove the data from that disk prior to dropping the disk.
• C、 The disk group will be automatically rebalanced during the drop operation. Once the rebalancing is complete，the disk will be dropped.
• D、 This command will fail because you cannot drop a specific disk in an ASM disk group.
• E、 The disk drop command will be suspended for a predetermined amount of time，waiting for you to also issue an alter diskgroup rebalance command. Once you have issued the rebalance command，ASM will proceed to rebalance the disk group and then drop the disk.

第15题：

You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）

• A、Immediately following statement execution 
• B、After the ALTER TABLE DROP UNUSED COLUMNS command is issued 
• C、After the ALTER TABLE SET UNUSED COLUMN command is issued 
• D、After the ALTER TABLE MODIFY command is issued

第16题：

You issued the following command：        SQL> DROP TABLE MYTABLE；        SQL> SHOW RECYCLEBIN  The following output is returned：        ORIGINAL NAME RECYCLEBIN NAME               OBJECT TYPE      DROP TIME        ------------- ------------------------------ --------------- --------------------        MYTABLE BIN$04LhcpndanfgMAAAAAANPw==$0     TABLE           2005-01-13：20：11：31  You want to drop the table， MYTABLE， from the Recycle Bin. Which two commands can you issue to accomplish the desired task？（）

• A、 DROP TABLE MYTABLE PURGE；
• B、 PURGE RECYCLEBIN；
• C、 PURGE TABLE MYTABLE；
• D、 PURGE TABLE BIN$04LhcpndanfgMAAAAAANPw==$0；

第17题：

You issued the following command to drop the PRODUCTS table: SQL> DROP TABLE products; What is the implication of this command?（）

• A、All data along with the table structure is deleted 
• B、The pending transaction in the session is committed 
• C、All indexes on the table will remain but they are invalidated 
• D、All views and synonyms will remain but they are invalidated 
• E、All data in the table are deleted but the table structure will remain

第18题：

You created the ORDERS table in your database by using the following code：   SQL> CREATE TABLE ORDERS （ORDER_DATE TIMESTAMP（0） WITH TIME ZONE）；   Then， you inserted data in the ORDERS table and saved it by issuing the following statements：SQL> INSERT INTO ORDERS VALUES（’18-AUG-00 10：26：44 PM America/New_York’）；   SQL> INSERT INTO ORDERS VALUES（’23-AUG-02 12：46：34 PM America/New_York’）；   SQL> COMMIT；   Next， you issued the following statement to change the time zone for the database：   SQL> ALTER DATABASE SET TIME_ZONE=’Europe/London’；   What will be the result of executing the above statement？（）  

• A、 The statement will fail.
• B、 The statement will be executed successfully， and the new time zone will be set for the database.
• C、 The statement will be executed successfully， but the new time zone will be set for the current session.
• D、The statement will be executed successfully， but the new time zone will neither be set for the database nor for a specific session.

第19题：

Note the output of the following query；   SQL> SELECT flashback_archieve_name， status FROM dba_flashback_archieve； FLASHBACK_ARCHIEVE_NAME STATUS FLA1   You executed the following command to enable Flashback Data Archive on the EXCHANGB_PATE table：   ALTER TABLE exchange_rate FLASHBACK ARCHIEVE；   What is the outcome of this command？（）  

• A、 The table uses the default Flashback Data Archive.
• B、 The Flashback Data Archive Is created In the SYSAUX tablespace.
• C、 The Flashback Data Archive is created in the same tablespace where the tables are stored.
• D、 The command generates an error because no flashback Data Archive name is specified and there is no default Flashback Data Achieve.

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