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Oracle9i program with pl/sql Sample Questions:

1. You create a DML trigger. For the timing information, which is valid with a DML trigger?

A) ON STATEMENT EXECUTION
B) DURING
C) ON SHUTDOWN
D) BEFORE
E) INSTEAD

2. Examine this code:
CREATE OR REPLACE PROCEDURE audit_action (p_who VARCHAR2) AS BEGIN INSERT INTO audit(schema_user) VALUES(p_who); END audit_action; /
CREATE OR REPLACE TRIGGER watch_it AFTER LOGON ON DATABASE CALL audit_action(ora_login_user) / What does this trigger do?

A) The trigger invoked the procedure audit_action each time a user logs on to his/her schema and adds the username to the audit table.
B) The trigger records an audit trail when a user makes changes to the database.
C) The trigger invokes the procedure audit_action each time a user logs on to the database and adds the username to the audit table.
D) The trigger marks the user as logged on to the database before an audit statement is issued.

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

4. Examine this code:
CREATE OR REPLACE STORED FUNCTION get_sal
(p_raise_amt NUMBER, p_employee_id employees.employee_id%TYPE)
RETURN NUMBER
IS
v_salary NUMBER;
v_raise NUMBER(8,2);
BEGIN
SELECT salary
INTO v_salary
FROM employees
WHERE employee_id = p_employee_id;
v_raise := p_raise_amt * v_salary;
RETURN v_raise;
END;
Which statement is true?

A) This statement returns a raise amount based on an employee id.
B) This statement creates a stored procedure named get_sal.
C) This statement creates a stored function named get_sal.
D) This statement fails.
E) This statement creates a stored function named get_sal with a status of invalid.

5. Examine this code:
CREATE OR REPLACE PROCEDURE add_dept
( p_name departments.department_name%TYPE DEFAULT 'unknown',
p_loc departments.location_id%TYPE DEFAULT 1700)
IS
BEGIN
INSERT INTO departments(department_id, department_name,
loclation_id)
VALUES(dept_seq.NEXTVAL,p_name, p_loc);
END add_dept;
/
You created the add_dept procedure above, and you now invoke the procedure in SQL *Plus.
Which four are valid invocations? (Choose four)

A) EXECUTE add_dept('2500', p_loc =>2500)
B) EXECUTE add_dept(p_loc=>2500, p_name=>'Education')
C) EXECUTE add_dept('Education', 2500)
D) EXECUTE add_dept(p_loc=>2500)
E) EXECUTE add_dept(p_name=>'Education', 2500)

Solutions: