試題詳解

QUESTION 91 Examine this package CREATE OR REPLACE PACKAGE discounts IS g_id NUMBER:=7839 discount_rate NUMBER:=0.00; PROCEDURE display_price(p_price NUMBER); END discount; / CREATE OR REPLACE PACKAGE BODY discounts IS PROCEDURE display_price (p_price NUMBERI) IS BEGIN DBMS_OUTPUT.PUT LINE ( 'Discounted '|| TO_CHAR(p_price*NVL(discount_rate,1))); END discount; BEGIN Discount_rate=0.10; END discounts; / The SOL*Plus SERVEROUTPUT setting is turned on in your session. You execute the procedure DISPLAY_PRICE from SOL*Plus with the command EXECUTE discount.display_price(100); What is the result?
(A) Discounted 10
(B) Discounted 100
(C) Discounted 0.00
(D) Discounted NULL
(E) Discounted 0.10