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Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE FUNCTION calc_sal(p_salary NUMBER)
RETURN NUMBER
IS
v_raise NUMBER(4,2) DEFAULT 1.08;
BEGIN
RETURN v_raise * p_salary;
END calc_sal;
/
Which statement accurately call the stored function CALC_SAL? (Choose two)

A) SELECT salary, calc_sal(salary)
FROM employees
WHERE department_id = 60;
B) SELECT last_name, salary, calc_sal(salary)
FROM employees ORDER BY
calc_sal(salary);
C) UPDATE employees (calc_sal(salary))
SET salary = salary * calc_sal(salary);
D) DELETE FROM employees(calc_sal(salary))
WHERE calc_sal(salary) > 1000;
E) INSERT calc_sal(salary) INTO employees
WHERE department_id = 60;

2. When creating a function, in which section will you typically find the RETURN keyword?

A) DECLARATIVE
B) DECLARATIVE,EXECUTABLE and EXCEPTION HANDLING
C) EXECUTABLE and HEADER
D) HEADER only

3. Examine this code:
CREATE OR REPLACE PROCEDURE set_bonus
(p_cutoff IN VARCHAR2 DEFAULT 'WEEKLY'
p_employee_id IN employees_employee_id%TYPE
p_salary IN employees_salary%TYPE,
p_bonus_percent IN OUT NUMBER DEFAULT 1.5,
p_margin OUT NUMBER DEFAULT 2,
p_bonus_value OUT NUMBER)
IS
BEGIN UPDATE emp_bonus SET bonus_amount =(p_salary * p_bonus_percent)/p_margin WHERE employee_id = p_employee_id; END set_bonus; /
You execute the CREATE PROCEDURE statement above and notice that it fails. What are two reasons why it fails? (Choose two)

A) The declaration of the format parameter p_bonus_percent cannot have a DEFAULT clause.
B) The formal parameter p_cutoff cannot have a DEFAULT clause.
C) The format parameter p_bonus_value is declared but is not used anywhere.
D) The syntax of the UPDATE statement is incorrect.
E) The declaration of the format parameter p_margin cannot have a DEFAULT clause.
F) You cannot update a table using a stored procedure.

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

5. You have the following table:
CREATE TABLE Emp_log ( Emp_id NUMBER Log_date DATE, New_salary NUMBER, Action VARCHAR(20));
You have the following data in the EMPLOYEES table:
EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID
100 King 24000 90 101 Kochhar 17000 90 102 De Haan 17000 90 103 Hunold 9000 60 104 Ernst 6000 60 105 Austin 4800 60 106 Pataballa 4800 60 107 Lorentz 4200 60 108 Greenberg 12000 100 201 Hartstein 13000 20 202 Fay 6000 20
You create this trigger:
CREATE OR REPLACE TRIGGER Log_salary_increase AFTER UPDATE ON employees FOR EACH ROW WHEN (:new.Salary > 1000) BEGIN INSERT INTO Emp_log (Emp_id, Log_date, New_Salary, Action) VALUES (new.Employee_id, SYSDATE, :new.SALary, 'NEW SAL'); END /
Then, you enter the following SQL statement:
UPDATE Employee SET Salary = Salary + 1000.0 Where Department_id = 20M
What are the result in the EMP_LOG table?
A EMP_ID LOG_DATE NEW_SALARY ACTION
201 24-SEP-02 13000 NEW SAL 202 24-SEP-02 600 NEW SAL

A) EMP_ID LOG_DATE NEW_SALARY ACTION
201 24-SEP-02 NEW SAL 202 24-SEP-02 NEW SAL
B) EMP_ID LOG_DATE NEW_SALARY ACTION
201 24-SEP-02 14000 NEW SAL 202 24-SEP-02 7000 NEW SAL
C) No rows are inserted.

Solutions: