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Oracle 1Z0-147 Exam Syllabus Topics:

Oracle9i program with pl/sql Sample Questions:

1. You have a row level BEFORE UPDATE trigger on the EMP table. This trigger contains a SELECT statement on the EMP table to ensure that the new salary value falls within the minimum and maximum salary for a given job title.
What happens when you try to update a salary value in the EMP table?

A) The trigger fires successfully.
B) The trigger fails because you cannot use the minimum and maximum functions in a BEFORE UPDATE trigger.
C) The trigger fails because it needs to be a row level AFTER UPDATE trigger.
D) The trigger fails because a SELECT statement on the table being updated is not allowed.

2. 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) INSTEAD OF trigger
D) Application trigger

3. The OLD and NEW qualifiers can be used in which type of trigger?

A) Row level application trigger
B) Statement level DML trigger
C) Row level system trigger
D) Row level DML trigger
E) Statement level application trigger
F) Statement level system trigger

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

5. What part of a database trigger determines the number of times the trigger body executes?

A) Trigger type
B) Trigger timing
C) Trigger event
D) Trigger body

Solutions: