单选题The user SCOTT executes the following command successfully to increase the salary values in one of his sessions：  SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20；  Before SCOTT ends the transaction， user HR who has the privileges on EMP table executes

第1题：

授予sa用户在SCOTT.EMP表中SAL列的更新权限的语句是（）。

• A、GRANT CHANGE ON SCOTT.EMP TO SA
• B、GRANT UPDATE ON SCOTT.EMP（SAL） TO SA
• C、GRANT UPDATE （SAL） ON SCOTT.EMP TO SA
• D、GRANT MODIFY ON SCOTT.EMP（SAL） TO SA

第2题：

You execute the following piece of code with appropriate privileges: User SCOTT has been granted theCREATE SESSION privilege and the MGR role.Which two statements are true when a session logged in as SCOTT queries the SAL column in the viewand the table?（）

• A、Data is redacted for the EMP.SAL column only if the SCOTT session does not have the MGR role set.
• B、Data is redacted for EMP.SAL column only if the SCOTT session has the MGR role set.
• C、Data is never redacted for the EMP_V.SAL column.
• D、Data is redacted for the EMP_V.SAL column only if the SCOTT session has the MGR role set.
• E、Data is redacted for the EMP_V.SAL column only if the SCOTT session does not have the MGR role set.

第3题：

In which two scenarios should you issue the following command？（） FLASHBACK TABLE SCOTT.EMP TO TIMESTAMP SYSTIMESTAP- INTERVAL ’15’ MINUTE；

• A、 when the schema of the user， SCOTT， was deleted by mistake 15 minutes ago
• B、 when the table EMP of the SCOTT schema was dropped by mistake 15 minutes ago
• C、 when some rows of the table， EMP， in the SCOTT schema were deleted by mistake 15 minutes ago
• D、 when some incorrect values were inserted in the EMP table in the user Scott’s schema during the last 15 minutes
• E、 never， because FLASHBACK TABLE is not a valid command in Oracle 10g.

第4题：

User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL> SELECT ename FROM emp  2 WHERE job=’CLERK’ FOR UPDATE OF empno；  SCOTT has opened another session to work with the database instance.  Which three operations wouldwait when issued in SCOTT’s second session（）

• A、LOCK TABLE emp IN SHARE MODE；
• B、LOCK TABLE emp IN EXCLUSIVE MODE；
• C、UPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；
• D、INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；
• E、SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；

第5题：

User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command： SQL> SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance.  Which three operations would waitwhen issued in SCOTT’s second session（）

• A、LOCK TABLE emp IN SHARE MODE；
• B、LOCK TABLE emp IN EXCLUSIVE MODE；
• C、UPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？
• D、INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；
• E、SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno

第6题：

The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command：  SQL> GRANT SELECT，INSERT，UPDATE ON emp TO scott WITH GRANT OPTION； The user SCOTT executes this command to grant privileges to the user JIM： SQL> GRANT SELECT，INSERT，UPDATE ON hr.emp TO jim；  Now， the user HR decides to revoke privileges from JIM using this command： SQL> REVOKE SELECT，INSERT，UPDATE ON emp FROM jim； Which statement is true after HR issues the REVOKE command（）

• A、The command fails because SCOTT still has privileges.
• B、The command succeeds and privileges are revoked from JIM.
• C、The command fails because HR cannot revoke the privileges from JIM.
• D、The command succeeds and only HR has the privilege to perform the SELECT， INSERT， and UPDATEoperations on the EMP table.

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第13题：

The HR user creates a view with this command：  SQL> CREATE VIEW emp_v AS SELECT * FROM scott.emp；  Now HR wants to grant the SELECT privilege on the EMP_V view to the JIM user.  Which statement is true in this scenario？（）

• A、HR can grant the privilege to JIM but without GRANT OPTION.
• B、HR can grant the privilege to JIM because HR is the owner of the view.
• C、SCOTT has to grant the SELECT privilege on the EMP table to JIM before this operation.
• D、HR needs the SELECT privilege on the EMP table with GRANT OPTION from SCOTT for this operation.

第14题：

You execute the following command to audit the 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 the whole session if user SCOTT successfully drops one or more tables in his session.
• B、One audit record is created for every session when any user successfully drops a table owned by SCOTT.
• C、One audit record is created for each successful DROP TABLE command executed by any user to drop tables owned by SCOTT.
• D、One audit record is generated for the session when SCOTT grants the DROP ANY TABLE privilege to other users in his session.
• E、One audit record is created for each successful DROP TABLE command executed in the session of SCOTT.

第15题：

A redaction policy was added to the SAL column of the SCOTT.EMP table: All users have their default set of system privileges. For which three situations will data not be redacted?（）

• A、SYS sessions, regardless of the roles that are set in the session
• B、SYSTEM sessions, regardless of the roles that are set in the session
• C、SCOTT sessions, only if the MGR role is set in the session
• D、SCOTT sessions, only if the MGR role is granted to SCOTT
• E、SCOTT sessions, because he is the owner of the table
• F、SYSTEM session, only if the MGR role is set in the session

第16题：

The user SCOTT executes the following command successfully to increase the salary values in one of his sessions：  SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20；  Before SCOTT ends the transaction， user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data？（）

• A、because of redo data from redo log file
• B、because of data from database buffer cache
• C、because of data from a temporary tablespace
• D、because of undo data from the undo tablespace

第17题：

User A executes the following command to update the TRANS table）  SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’；  Before user A issues a COMMIT or ROLLBACK command， user B executes the following command on the TRANS table：   SQl> ALTER TABLE trans MODIFY （tr_type VARCHAR2 （3））；  What would happen in this scenario？（）

• A、The transaction for user A is rolled back.
• B、The ALTER TABLE command modifies the column successfully.
• C、The ALTER TABLE command fails due to the resource being busy.
• D、The ALTER TABLE command waits until user A ends the transaction.

第18题：

User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK，or any data definition language （DDL） command：  SQL> SELECT job FROM emp  2  WHERE job=’CLERK’ FOR UPDATE OF empno;  SCOTT has opened another session to work with the database. Which three operations would wait when issued in SCOTT’s second session？（）

• A、LOCK TABLE emp IN SHARE MODE;
• B、LOCK TABLE emp IN EXCLUSIVE MODE;
• C、DELETE FROM emp WHERE job=’MANAGER’;
• D、INSERT INTO emp（empno，ename） VALUES （1289，’Dick’）;
• E、SELECT job FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno;

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