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Oracle9i program with pl/sql Sample Questions:

1. Which two statements about functions are true? (Choose two.)

A) From SOL*Plus, a function can be executed by giving the command EXECUTE functionname;
B) A function must have a return statement in its body to execute successfully
C) A stored function that is called from a SOL statement can return a value of any PL/SOL variable data type
D) A stored function increases efficiency of queries by performing functions on the server rather than in the application
E) Client-side functions can be used in SOL statements

2. 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 discounts;
/
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(dlscount_rate, 1)));
END display_price;
BEGIN
Discount_rate = 0.10;
END discounts;
/
The SQL*Plus SERVEROUTPUT setting is turned on in your session. You execute the procedure
DISPLAY_PRICE from SQL*Plus with the command EXECUTE discounts. display_price (100);
What is the result?

A) Discounted 10
B) Discounted NULL
C) Discounted 0.00
D) Discounted 100
E) Discounted 0.10

3. Examine this code:
CREATE OR REPLACE PRODECURE add_dept (p_dept_name VARCHAR2 DEFAULT 'placeholder', p_location VARCHAR2 DEFAULT 'Boston')
IS BEGIN INSERT INTO departments VALUES (dept_id_seq.NEXTVAL, p_dept_name, p_location); END add_dept; /
Which three are valid calls to the add_dep procedure? (Choose three)

A) add_dept;
B) add_dept(, 'New York');
C) add_dept(p_location=>'New York');
D) add_dept('Accounting');

4. The add_player procedure inserts rows into the PLAYER table. Which command will show this directory dependency?

A) SELECT * FROM USER_DEPENDENCIES WHERE REFERENCED_NAME = 'PLAYER';
B) SELECT * FROM USER DEPENDENCIES WHERE REFERENCED_NAME = 'ADD_PLAYER';
C) SELECT * FROM USER_DEPENDENCIES WHERE TYPE = 'DIR';
D) SELECT * FROM USER DEPENDENCIES WHERE REFERENCED_NAME = 'TABLE';

5. What happens during the execute phase with dynamic SQL for INSERT, UPDATE, and DELETE operations?

A) The validity of the SQL statement is established.
B) The area of memory established to process the SQL statement is released.
C) An area of memory is established to process the SQL statement.
D) The rows are selected and ordered.
E) The SQL statement is run and the number of rows processed is returned.

Solutions: