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Oracle9i program with pl/sql Sample Questions:

1. Which two dictionary views track dependencies? (Choose two)

A) DBA_DEPENDENT_OBJECTS
B) USER_DEPENDENCIES
C) UTL_DEPTREE
D) DEPTREE_TEMPTAB
E) USER_SOURCE
F) USER_OBJECTS

2. Which statement about triggers is true?

A) You use a database trigger to fire when an INSERT statement occurs.
B) You use a system event trigger to fire when an UPDATE statement occurs.
C) You use an application trigger to fire when a DELETE statement occurs.
D) You use INSTEAD OF trigger to fire when a SELECT statement occurs.

3. You disabled all triggers on the EMPLOYEES table to perform a data load. Now, you need to enable all triggers on the EMPLOYEES table. Which command accomplished this?

A) You cannot enable multiple triggers on a table in one command.
B) ALTER employees ENABLE ALL TRIGGERS;
C) ALTER TRIGGERS ON TABLE employees ENABLE;
D) ALTER TABLE employees ENABLE ALL TRIGGERS;

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

5. Examine this package:
CREATE OR REPLACE PACKAGE manage_emps
IS
tax_rate CONSTANT NUMBER(5,2) := .28;
v_id NUMBER;
PROCEDURE insert_emp (p_deptno NUMBER, p_sal NUMBER);
PROCEDURE delete_emp;
PROCEDURE update_emp;
FUNCTION calc_tax (p_sal NUMBER)
RETURN NUMBER;
END manage_emps;
/
CREATE OR REPLACE PACKAGE BODY manage_emps
IS
PROCEDURE update_sal
(p_raise_amt NUMBER)
IS
BEGIN UPDATE emp SET sal = (sal * p_raise_emt) + sal WHERE empno = v_id; END; PROCEDURE insert_emp (p_deptno NUMBER, p_sal NUMBER) IS BEGIN INSERT INTO emp(empno, deptno, sal) VALYES(v_id, p_depntno, p_sal); END insert_emp; PROCEDURE delete_emp IS BEGIN DELETE FROM emp WHERE empno = v_id; END delete_emp; PROCEDURE update_emp IS v_sal NUMBER(10, 2); v_raise NUMBER(10, 2); BEGIN SELECT sal INTO v_sal FROM emp WHERE empno = v_id; IF v_sal < 500 THEN v_raise := .05; ELSIP v_sal < 1000 THEN v_raise := .07; ELSE v_raise := .04; END IF; update_sal(v_raise); END update_emp; FUNCTION calc_tax (p_sal NUMBER) RETURN NUMBER IS BEGIN RETURN p_sal * tax_rate;
END calc_tax;
END manage_emps;
/
How many public procedures are in the MANAGE_EMPS package?

A) Two
B) Four
C) Three
D) One
E) Five

Solutions: