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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. Examine this procedure:
CREATE OR REPLACE PROCEDURE INSERT_TEAM
(V_ID in NUMBER, V_CITY in VARCHAR2 DEFAULT 'AUSTIN', V_NAME in VARCHAR2)
IS
BEGIN
INSERT INTO TEAM (id, city, name)
VALUES (v_id, v_city, v_name);
COMMIT;
END
Which two statements will successfully invoke this procedure in SQL *Plus? (Choose two)

A) EXECUTE INSERT_TEAM(3, V_NAME=>'LONGHORNS', V_CITY=>'AUSTIN');
B) EXECUTE INSERT_TEAM(3, 'AUSTIN','LONGHORNS');
C) EXECUTE INSERT_TEAM (3, 'LONGHORNS');
D) EXECUTE INSERT_TEAM;
E) EXECUTE INSERT_TEAM (V_ID := V_NAME := 'LONGHORNS', V_CITY := 'AUSTIN');

3. Examine this code:
CREATE OR REPLACE PROCEDURE insert_dept
(p_location_id NUMBER)
IS
v_dept_id NUMBER(4);
BEGIN
INSERT INTO departments
VALUES (5, 'Education', 150, p_location_id);
SELECT department_id
INTO v_dept_id
FROM employees
WHERE employee_id=99999;
END insert_dept;
/
CREATE OR REPLACE PROCEDURE insert_location
( p_location_id NUMBER,
p_city VARCHAR2)
IS
BEGIN
INSERT INTO locations(location_id, city)
VALUES (p_location_id, p_city);
insert_dept(p_location_id);
END insert_location;
/
You just created the departments, the locations, and the employees table. You did not insert any
rows. Next you created both procedures.
You new invoke the insert_location procedure using the following command:
EXECUTE insert_location (19, 'San Francisco')
What is the result in thisEXECUTE command?

A) The location table has one row.
The departments and the employees tables are empty.
B) The departments table has one row.
The locations and the employees tables are empty.
C) The locations, departments, and employees tables are empty.
D) The locations table and the departments table both have one row. The employees table is empty.

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

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

5. Examine this code CREATE OR REPLACE FUNCTION change_dept (p_old_id NUMBER, p_deptname VARCHAR2) RETURN NUMBER IS V_new_id NUMBER; BEGIN SELECT departments_seq.nextval INTO v_new_id FROM dual; UPDATE departments SET departmenet_id = v_new_id, Department_name = p_deptname WHERE department_id = p_old_id; Return v_new_id; END; /
There are no foreign key integrity constraints on the EMPLOYEES and DEPARTMENTS tables. Which statement performs a successful update to the EMPLOYEES table?

A) UPDATE departments
SET department_id = change_dept(10, 'Finance')
Where department_id = 10;
B) UPDATE departments
change_dept(270, 'Outsource')
Where department_name = 'payroll';
C) UPDATE employees
SET department_id = change_dept(10, 'Finance')
Where department_id = DEPARTMENTS:CURRVAL;
D) UPDATE employees
SET department_id = change_dept(10, 'Finance')
Where department_id = 10;

Solutions: