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Oracle9i program with pl/sql Sample Questions:

1. Which three are true statements about dependent objects? (Choose three)

A) You can view whether an object is valid or invalid in the USER_STATUS data dictionary view.
B) Invalid objects cannot be described.
C) The Oracle server automatically records dependencies among objects.
D) All schema objects have a status that is recorded in the data dictionary.
E) You can view whether an object is valid or invalid in the USER_OBJECTS data dictionary view.
F) An object with status of invalid cannot be a referenced object.

2. Examine this procedure:
CREATE OR REPLACE PROCEDURE ADD_PLAYER
(V_ID IN NUMBER, V_LAST_NAME VARCHAR2)
IS
BEGIN
INSERT INTO PLAYER (ID,LAST_NAME)
VALUES (V_ID, V_LAST_NAME);
COMMIT;
END;
This procedure must invoke the APD_BAT_STAT procedure and pass a parameter.
Which statement, when added to the above procedure will successfully invoke the
UPD_BAT_STAT procedure?

A) UPD_BAT_STAT(V_ID);
B) EXECUTE UPD_BAT_STAT(V_ID);
C) START UPD_BAT_STAT(V_ID);
D) RUN UPD_BAT_STAT(V_ID);

3. 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;
/
What is the name of the private procedure in this package?

A) UPDATE_SAL
B) MANAGE_EMPS
C) DELETE_EMP
D) UPDATE_EMP
E) INSERT_EMP
F) CALC_TAX

4. Which statements are true? (Choose all that apply)

A) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_TRIGGERS data dictionary view to see the compilation errors.
B) If errors occur during the compilation of a trigger you can use the SHOW ERRORS command within iSQL *Plus to see the compilation errors.
C) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_ERRORS data dictionary view to see compilation errors.
D) If errors occur during the compilation of a trigger, the trigger is still created.

5. Examine this code:
CREATE OR REPLACE FUNCTION gen_email_name
(p_first_name VARCHAR2, p_last_name VARCHAR2, p_id NUMBER)
RETURN VARCHAR2
is
v_email_name VARCHAR2(19);
BEGIN
v_email_home := SUBSTR(p_first_name, 1, 1) ||
SUBSTR(p_last_name, 1, 7) ||
'@Oracle.com';
UPDATE employees
SET email = v_email_name
WHERE employee_id = p_id;
RETURN v_email_name;
END;
You run this SELECT statement:
SELECT first_name, last_name
gen_email_name(first_name, last_name, 108) EMAIL
FROM employees;
What occurs?

A) The statement fails because functions called from SQL expressions cannot perform DML.
B) The statement fails because the functions does not contain code to end the transaction.
C) The SQL statement executes successfully, because UPDATE and DELETE statements are ignoring in stored functions called from SQL expressions.
D) Employee 108 has his email name updated based on the return result of the function.
E) The SQL statement executes successfully and control is passed to the calling environment.

Solutions: