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Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE PACKAGE bonus
IS
g_max_bonus NUMBER := .99;
FUNCTION calc_bonus (p_emp_id NUMBER)
RETURN NUMBER;
FUNCTION calc_salary (p_emp_id NUMBER)
RETURN NUMBER;
END;
/
CREATE OR REPLACE PACKAGE BODY bonus
IS v_salary employees.salary%TYPE; v_bonus employees.commission_pct%TYPE; FUNCTION calc_bonus (p_emp_id NUMBER) RETURN NUMBER IS BEGIN SELECT salary, commission_pct INTO v_salary, v_bonus FROM employees WHERE employee_id = p_emp_id; RETURN v_bonus * v_salary; END calc_bonus FUNCTION calc_salary (p_emp_id NUMBER) RETURN NUMBER IS BEGIN SELECT salary, commission_pct INTO v_salary, v_bonus FROM employees WHERE employees RETURN v_bonus * v_salary + v_salary; END cacl_salary; END bonus; / Which statement is true?

A) You can call the BONUS.CALC_SALARY packaged function from an INSERT command against the EMPLOYEES table.
B) You can call the BONUS.CALC_SALARY packaged function form a DELETE command against the EMPLOYEES table.
C) You can call the BONUS.CALC_SALARY packaged function from a SELECT command against the EMPLOYEES table.
D) You can call the BONUS.CALC_SALARY packaged function from an UPDATE command against the EMPLOYEES table.

2. You need to disable all triggers on the EMPLOYEES table.Which command accomplishes this?

A) ALTER employees DISABLE ALL TRIGGERS;
B) ALTER TRIGGERS ON TABLE employees DISABLE;
C) None of these commands; you cannot disable multiple triggers on a table in one command.
D) ALTER TABLE employees DISABLE ALL TRIGGERS;

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

4. Which four triggering events can cause a trigger to fire? (Choose four)

A) A user executes a CREATE or an ALTER table statement.
B) A database is shut down or started up.
C) A user executes a JOIN statement that uses four or more tables.
D) A specific error or any errors occurs.
E) A specific user or any user logs on or off.
F) A user executes a SELECT statement with an ORDER BY clause.

5. Examine this code:
CREATE OR REPLACE TRIGGER update_emp
AFTER UPDATE ON emp
BEGIN
INSERT INTO audit_table (who, dated)
VALUES (USER, SYSDATE);
END;
You issue an UPDATE command in the EMP table that results in changing 10 rows.
How many rows are inserted into the AUDIT_TABLE?

A) A value equal to the number of rows in the EMP table.
B) 10
C) None
D) 1

Solutions: