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Oracle9i program with pl/sql Sample Questions:

1. You need to implement a virtual private database (vpd). In order to have the vpd functionality, a trigger is required to fire when every user initiates a session in the database.What type of trigger needs to be created?

A) INSTEAD OF trigger
B) Application trigger
C) System event trigger
D) DML trigger

2. When using a PL/SQL stored package, how is a side effect defined?

A) changes to database tables or packaged variables defined in a package specification
B) changes only to packaged public variables defined in a package body
C) changes to database tables or packaged public variables defined in a package body
D) changes only to packaged public variables defined in a package specification
E) changes only to database tables

3. Examine this code:
CREATE OR REPLACE PACKAGE comm_package
IS
g_comm NUMBER := 10;
PROCEDURE reset_comm(p_comm IN NUMBER);
END comm_package;
/
User Jones executes the following code at 9:01am: EXECUTE comm_package.g_comm := 15
User Smith executes the following code at 9:05am: EXECUTE comm_paclage.g_comm := 20
Which statement is true?

A) g_comm has a value of 10 at 9:06am for both Jones and Smith.
B) g_comm has a value of 15 at 9:06am for Jones.
C) g_comm has a value of 20 at 9:06am for both Jones and Smith.
D) g_comm has a value of 15 at 9:06am for Smith.
E) g_comm has a value of 15 at 9:03 am for both Jones and Smith.
F) g_comm has a value of 10 at 9:03am for both Jones and Smith

4. You want to create a PL/SQL block of code that calculates discounts on customer orders. -This code will be invoked from several places, but only within the program unit ORDERTOTAL. What is the most appropriate location to store the code that calculates the discounts?

A) A standalone procedure on the client machine.
B) A stored procedure on the server.
C) A block of code in a PL/SQL library.
D) A local subprogram defined within the program unit ORDERTOTAL.
E) A block of code in the body of the program unit ORDERTOTAL.

5. Examine this function:
CREATE OR REPLACE FUNCTION CALC_PLAYER_AVG (V_ID in PLAYER_BAT_STAT.PLAYER_ID%TYPE) RETURN NUMBER IS V_AVG NUMBER; BEGIN SELECT HITS / AT_BATS INTO V_AVG FROM PLAYER_BAT_STAT WHERE PLAYER_ID = V_ID; RETURN (V_AVG); END; Which statement will successfully invoke this function in SQL *Plus?

A) EXECUTE CALC_PLAYER_AVG(31);
B) SELECT CALC_PLAYER_AVG(PLAYER_ID) FROM PLAYER_BAT_STAT;
C) START CALC_PLAYER_AVG(31)
D) CALC_PLAYER_AVG(31);
E) CALC_PLAYER('RUTH');

Solutions: