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Oracle9i program with pl/sql Sample Questions:
1. Why do you use an INSTEAD OF trigger?
A) To modify data in which the DML statement has been issued against an inherently nonupdateable view.
B) To insert into an audit table when data is updated in a sensitive column.
C) To perform clean up actions when ending a user session.
D) To insert data into a view that normally does not accept inserts.
2. When using a PL/SQL stored package, how is a side effect defined?
A) changes only to packaged public variables defined in a package body
B) changes to database tables or packaged public variables defined in a package body
C) changes only to database tables
D) changes only to packaged public variables defined in a package specification
E) changes to database tables or packaged variables defined in a package specification
3. To be callable from a SQL expression, a user-defined function must do what?
A) Return a BOOLEAN or VARCHAR2 data type.
B) Have both IN and OUT parameters.
C) Be stored only in the database.
D) Use the positional notation for parameters.
4. Examine this code:
CREATE OR REPLACE PROCEDURE add_dept
( p_name departments.department_name%TYPE DEFAULT 'unknown',
p_loc departments.location_id%TYPE DEFAULT 1700)
IS
BEGIN
INSERT INTO departments(department_id, department_name,
loclation_id)
VALUES(dept_seq.NEXTVAL,p_name, p_loc);
END add_dept;
/
You created the add_dept procedure above, and you now invoke the procedure in SQL *Plus.
Which four are valid invocations? (Choose four)
A) EXECUTE add_dept(p_name=>'Education', 2500)
B) EXECUTE add_dept(p_loc=>2500)
C) EXECUTE add_dept('Education', 2500)
D) EXECUTE add_dept('2500', p_loc =>2500)
E) EXECUTE add_dept(p_loc=>2500, p_name=>'Education')
5. Examine this package:
CREATE OR REPLACE PACKAGE BB_PACK
IS
V_MAX_TEAM_SALARY NUMBER(12,2);
PROCEDURE ADD_PLAYER(V_ID IN NUMBER, V_LAST_NAME VARCHAR2,
V_SALARY_NUMBER;
END BB_PACK;
/
CREATE OR REPLACE PACKAGE BODY BB_PACK
IS
PROCEDURE UPD_PLAYER_STAT
(V_ID IN NUMBER, V_AB IN NUMBER DEFAULT 4, V_HITS IN NUMBER)
IS
BEGIN
UPDATE PLAYER_BAT_STAT
SET AT_BATS = AT_BATS + V_AB,
HITS = HITS + V_HITS
WHERE PLAYER_ID = V_ID)
COMMIT;
END UPD_PLAYER_STAT;
PROCEDURE ADD_PLAYER
(V_ID IN NUMBER, V_LAST_NAME VARCHAR2, V_SALARY NUMBER)
IS
BEGIN
INSERT INTO PLAYER(ID,LAST_NAME,SALARY)
VALUES (V_ID, V_LAST_NAME, V_SALARY);
UPD_PLAYER_STAT(V_ID,0.0);
END ADD_PLAYER;
END BB_PACK;
Which statement will successfully assign $75,000,000 to the V_MAX_TEAM_SALARY variable
from within a stand-alone procedure?
A) BB_PACK.ADD_PLAYER.V_MAX_TEAM_SALARY := 75000000;
B) BB_PACK.V_MAX_TEAM_SALARY := 75000000;
C) This variable cannot be assigned a value from outside the package.
D) V_MAX_TEAM_SALARY := 7500000;
Solutions:
Question # 1 Answer: A | Question # 2 Answer: E | Question # 3 Answer: D | Question # 4 Answer: B,C,D,E | Question # 5 Answer: B |