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Oracle9i program with pl/sql Sample Questions:

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

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

2. Examine this code:
CREATE OR REPLACE FUNCTION gen_email_name
(p_first_name VARCHAR2, p_last_name VARCHAR2, p_id NUMBER)
RETURN VARCHAR2
is
v_email_name VARCHAR2(19);
BEGIN
v_email_home := SUBSTR(p_first_name, 1, 1) ||
SUBSTR(p_last_name, 1, 7) ||
'@Oracle.com';
UPDATE employees
SET email = v_email_name
WHERE employee_id = p_id;
RETURN v_email_name;
END;
You run this SELECT statement:
SELECT first_name, last_name
gen_email_name(first_name, last_name, 108) EMAIL
FROM employees;
What occurs?

A) The statement fails because the functions does not contain code to end the transaction.
B) Employee 108 has his email name updated based on the return result of the function.
C) The SQL statement executes successfully and control is passed to the calling environment.
D) The SQL statement executes successfully, because UPDATE and DELETE statements are ignoring in stored functions called from SQL expressions.
E) The statement fails because functions called from SQL expressions cannot perform DML.

3. Examine the code examples. Which one is correct?

A) CREATE OR REPLACE TRIGGER authorize_action CALL log_execution BEFORE INSERT ON EMPLOYEES; /
B) CREATE OR REPLACE TRIGGER authorize_action BEFORE EMPLOYEES INSERT CALL log_execution;
C) CREATE OR REPLACE TRIGGER authorize_action BEFORE EMPLOYEES INSERT CALL log_execution;
D) CREATE OR REPLACE TRIGGER authorize_action BEFORE INSERT ON EMPLOYEES CALL log_execution; /

4. Which two statements about packages are true? (Choose two)

A) The contents of packages can be shared by many applications.
B) Packages can be nested.
C) You can achieve information hiding by making package constructs private.
D) You can pass parameters to packages.
E) A package is loaded into memory each time it is invoked.

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) This variable cannot be assigned a value from outside the package.
C) BB_PACK.V_MAX_TEAM_SALARY := 75000000;
D) V_MAX_TEAM_SALARY := 7500000;

Solutions: