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Oracle 1Z0-147 Exam Syllabus Topics:

Oracle9i program with pl/sql Sample Questions:

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

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

3. You need to create a trigger to ensure that information in the EMP table is only modified during business hours, Monday to Friday from 9:00am to 500pm Which types of trigger do you create? (Choose two.)

A) row level AFTER INSERT OR UPDATE OR DELETE ON EMP
B) statement level AFTER INSERT OR UPDATE OR DELETE ON EMP
C) statement level BEFORE INSERT OR UPDATE OR DELETE ON EMP
D) row level BEFORE INSERT OR UPDATE OR DELETE ON EMP

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

5. Examine this code:
CREATE OR REPLACE PACKAGE metric_converter
IS
c_height CONSTRAINT NUMBER := 2.54;
c_weight CONSTRAINT NUMBER := .454;
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER;
END;
/
CREATE OR REPLACE PACKAGE BODY metric_converter
IS
FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * c_height;
END calc_height;
FUNCTION calc_weight (p_weight_in_pounds NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_weight_in_pounds * c_weight
END calc_weight
END metric_converter;
/
CREATE OR REPLACE FUNCTION calc_height (p_height_in_inches NUMBER)
RETURN NUMBER
IS
BEGIN
RETURN p_height_in_inches * metric_converter.c_height;
END calc_height;
/
Which statement is true?

A) If you remove the stand alone stored function CALC_HEIGHT, then the METRIC_CONVERTER package body and the package specification are removed.
B) If you remove the package body, then the package specification is removed.
C) If you remove the package specification, then the package body is removed.
D) If you remove the package body, then the package specification and the stand alone stored function CALC_HEIGHT are removed.
E) The stand alone function CALC_HEIGHT cannot be created because its name is used in a packaged function.
F) If you remove the package specification, then the package body and the stand alone stored function CALC_HEIGHT are removed.

Solutions: