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

2. Which statement is true about removing packages?

A) You must remove both the package body and the specification separately
B) You must remove the package body first
C) Removing a package specification removes the body too
D) Removing the package body removes the specification too
E) Removing a package specification removes all stand alone stored functions named in the specification

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

4. Examine this code:
CREATE OR REPLACE PROCEDURE audit_emp
(p_id IN emp_empno%TYPE)
IS
v_id NUMBER;
PROCEDURE log_exec
IS
BEGIN
INSERT INTO log_table (user_id, log_delete)
VALUES (USER, SYSDATE);
END log_exec;
v_name VARCHAR2(20);
BEGIN
DELETE FROM emp
WHERE empno = p_id;
log_exec;
SELECT ename, empno
INTO v_name, v_id
FROM emp
WHERE empno = p_id;
END audit_emp;
Why does this code cause an error when compiled?

A) The LOG_EXEC procedure should be invoked as EXECUTE log_exec with the AUDIT_EMP procedure.
B) An insert statement is not allowed in a subprogram declaration.
C) Variable v_name should be declared before declaring the LOG_EXEC procedure.
D) Procedure LOG_EXEC should be declared before any identifiers.

5. This statement fails when executed:
CREATE OR REPLACE TRIGGER CALC_TEAM_AVG
AFTER INSERT ON PLAYER
BEGIN
INSERT INTO PLAYER_BATSTAT (PLAYER_ID, SEASON_YEAR,AT_BATS,HITS)
VALUES (:NEW.ID, 1997, 0,0);
END;
To which type must you convert the trigger to correct the error?

A) Statement
B) Before
C) ORACLE FORM trigger
D) Row

Solutions: