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Oracle 1Z0-147 Exam Syllabus Topics:

Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE PACKAGE metric_converter
IS
c_height CONSTRAINT NUMBER := 2.54;
c_weight CONSTRAINT NUMBER := .454;
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER;
END;
/
CREATE OR REPLACE PACKAGE BODY metric_converter
IS
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * c_height;
END calc_height;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_weight_in_pounds * c_weight
END calc_weight
END metric_converter;
/
CREATE OR REPLACE FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * metric_converter.c_height;
END calc_height;
/
Which statement is true?

A) The stand alone function CALC_HEIGHT cannot be created because its name is used in a packaged function.
B) If you remove the package body, then the package specification is removed.
C) If you remove the stand alone stored function CALC_HEIGHT, then the METRIC_CONVERTER package body and the package specification are removed.
D) If you remove the package specification, then the package body and the stand alone stored function CALC_HEIGHT are removed.
E) If you remove the package specification, then the package body is removed.
F) If you remove the package body, then the package specification and the stand alone stored function CALC_HEIGHT are removed.

2. Examine the trigger:
CREATE OR REPLACE TRIGGER Emp_count
AFTER DELETE ON Emp_tab
FOR EACH ROW
DELCARE
n INTEGER;
BEGIN
SELECT COUNT(*)
INTO n
FROM Emp_tab;
DBMS_OUTPUT.PUT_LINE(' There are now ' || a ||
' employees,');
END;
This trigger results in an error after this SQL statement is entered:
DELETE FROM Emp_tab WHERE Empno = 7499;
How do you correct the error?

A) Change the trigger to a statement-level trigger by removing FOR EACH ROW.
B) Change the trigger type to a BEFORE DELETE.
C) Take out the COUNT function because it is not allowed in a trigger.
D) Remove the DBMS_OUTPUT statement because it is not allowed in a trigger.

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

4. 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;
You make a change to the body of the BB_PACK package. The BB_PACK body is recompiled.
What happens if the stand alone procedure VALIDATE_PLAYER_STAT references this package?

A) VALIDATE_PLAYER_STAT cannot recompile and must be recreated.
B) VALIDATE_PLAYER_STAT and BB_PACK are invalidated.
C) VALIDATE_PLAYER_STAT is not invalidated.
D) VALDIATE_PLAYER_STAT is invalidated.

5. 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 insert data into a view that normally does not accept inserts.
D) To perform clean up actions when ending a user session.

Solutions: