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Oracle9i program with pl/sql Sample Questions:

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

2. Under which two circumstances do you design database triggers? (Choose two)

A) To replicate built-in constraints in the Oracle server such as primary key and foreign key.
B) For centralized, global operations that should be fired for the triggering statement, regardless of which user or application issues the statement.
C) To duplicate the functionality of other triggers.
D) To guarantee that when a specific operation is performed, related actions are performed.

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 an INSERT 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 a SELECT command against the EMPLOYEES table.

4. Which two program declarations are correct for a stored program unit? (Choose two)

A) CREATE OR REPLACE FUNCTION tax_amt
(p_id NUMBER)
RETURN NUMBER
B) CREATE OR REPLACE PROCEDURE tax_amt
(p_id NUMBER, p_amount OUT NUMBER)
C) CREATE OR REPLACE FUNCTION tax_amt
(p_id NUMBER)
RETURN NUMBER(10,2)
D) CREATE OR REPLACE PROCEDURE tax_amt
(p_id NUMBER, p_amount OUT NUMBER(10, 2))
E) CREATE OR REPLACE PROCEDURE tax_amt
(p_id NUMBER)
RETURN NUMBER

5. You want to create a PL/SQL block of code that calculates discounts on customer orders. -This code will be invoked from several places, but only within the program unit ORDERTOTAL. What is the most appropriate location to store the code that calculates the discounts?

A) A local subprogram defined within the program unit ORDERTOTAL.
B) A block of code in a PL/SQL library.
C) A standalone procedure on the client machine.
D) A block of code in the body of the program unit ORDERTOTAL.
E) A stored procedure on the server.

Solutions: