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Oracle9i program with pl/sql Sample Questions:

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

2. Which table should you query to determine when your procedure was last compiled?

A) USER_PROCEDURES
B) USER_OBJECTS
C) USER_PLSQL_UNITS
D) USER_PROCS

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

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

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

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

Solutions: