多选题You execute this command to drop the ITEM table， which has the primary key referred in the ORDERS table：SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE；  Which two statements are true about theeffect of the command（）ANo flashback is possible to br

第1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2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3题：

第4题：

You execute this command to drop the ITEM table， which has the primary key referred in the ORDERtable：  SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE；  Which two statements are true about the effect of the command（）

• A、No flashback is possible to bring back the ITEM table.
• B、The ORDER table is dropped along with the ITEM table.
• C、The dependent referential integrity constraints in the ORDER table are disabled.
• D、The dependent referential integrity constraints in the ORDER table are removed.
• E、The table definition of the ITEM table and associated indexes are placed in the recycle bin.

第5题：

For which two SQL statements can you use the Flashback Table feature to revert a table to its previous state？（）

• A、UPDATE TABLE
• B、CREATE CLUSTER
• C、TRUNCATE TABLE
• D、ALTER TABLE MOVE
• E、INSERT INTO···VALUES
• F、ALTER TABLE···DROP COLUMN
• G、ALTER TABLE···DROP PARTITION

第6题：

Which two statements are true about the primary key constraint in a table？ （）

• A、It is not possible to disable the primary key constraint.
• B、It is possible to have more than one primary key constraint in a single table.
• C、The primary key constraint can be referred by only one foreign key constraint.
• D、The primary key constraint can be imposed by combining more than one column.
• E、The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.

第7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8题：

第9题：

You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）

• A、Restore the backup control file and open the database with RESETLOGS option.
• B、Perform point-in-time recovery because flashback cannot be performed again on this table
• C、Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
• D、Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

第10题：

Examine the command that is used to create a table：  SQL> CREATE TABLE orders（oid NUMBER（6） PRIMARY KEY， odate DATE， ccode NUMBER（6）， oamt NUMBER（10，2）） TABLESPACE users；  Which two statements are true about the effect of the above command） （）

• A、A CHECK constraint is created on the OID column.
• B、A NOT NULL constraint is created on the OID column.
• C、The ORDERS table is the only object created in the USERS tablespace.
• D、The ORDERS table and a unique index are created in the USERS tablespace.
• E、The ORDERS table is created in the USERS tablespace and a unique index is created on the OIDcolumn in the SYSTEM tablespace.