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问题:

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Evaluate the following function code:  
CREATE FUNCTION get_dept_avg(dept_id NUMBER) RETURN NUMBER RESULT_CACHE RELIES_ON (EMPLOYEES) IS avgsal NUMBER(6); BEGIN 
SELECT AVG(SALARY)INTO avgsal FROM EMPLOYEES  
WHERE DEPARTMENT_ID = dept_id; RETURN avgsal; END get_dept_avg;  
Which statement is true regarding the above function?()

A .  The cached result becomes invalid when any structural change is done to the EMPLOYEES table. 
B .  If the function execution results in an unhandled exception,the exception result is also stored in the cache.
C .  Each time the function is invoked in a different session,the current result in the result cache gets overwritten.
D .  If the function is invoked with a different parameter value,the existing result in the result cache gets overwritten by the latest value.

You execute the following RMAN command in the order shown below: BACKUP VALIDATE DATABASE; BLOCKRECOVER CORRUPTION LIST; What will these commands do?()  Create a backup of the database and recover all corrupted blocks found in the backup.。  Run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the database.。  Run a backup validation to populate V$COPY_CORRUPTION view, and then list any corrupt blocks recorded in the view.。  Run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view, and then repair any corrupt blocks recorded in the view.。  Run a backup validation, repair any corrupt blocks found during the validation process, and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired.。 王某,20岁,不慎被金环蛇咬伤,以下哪一项不是咬伤后的临床表现() 烦躁不安。 语言不清。 视物模糊。 皮肤粘膜出血。 肢体软瘫或麻木。 什么是正点行车?影响正点行车的因素有哪些?如何保证正点行车? 简述往复式压缩机活塞的基本结构型式。 You are connecting to an Oracle database server from a client by using the following connect string:  SQL> CONNECT hr/hr@pdserver.us.oracle.com:1521/proddb  Which naming method is being used in this case?() Local Naming。 Easy Connect。 External Naming。 Directory Naming。

Evaluate the following function code:  
CREATE FUNCTION get_dept_avg(dept_id NUMBER) RETURN NUMBER RESULT_CACHE RELIES_ON (EMPLOYEES) IS avgsal NUMBER(6); BEGIN 
SELECT AVG(SALARY)INTO avgsal FROM EMPLOYEES  
WHERE DEPARTMENT_ID = dept_id; RETURN avgsal; END get_dept_avg;  
Which statement is true regarding the above function?()

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