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Oracle9i program with pl/sql Sample Questions:

1. When using a PL/SQL stored package, how is a side effect defined?

A) changes to database tables or packaged public variables defined in a package body
B) changes to database tables or packaged variables defined in a package specification
C) changes only to packaged public variables defined in a package body
D) changes only to packaged public variables defined in a package specification
E) changes only to database tables

2. Examine this code:
CREATE OR REPLACE FUNCTION gen_email_name
(p_first VARCHAR2, p_last VARCHAR2)
RETURN VARCHAR2
IS
v_email_name VARCHAR (19) ;
BEGIN
v_email_bame := SUBSTR(p_first, 1, 1) ||
SUBSTR(p_last, 1, 7) ||
RETURN v_email_name;
END;
/
Which two statements are true? Select two.

A) This function will generate a string based on 2 character values passed into the function.
B) This function can be used only on tables where there is a p_first and p_last column.
C) This function is invalid.
D) This function can be used only if the two parameters passed in are not null values.
E) This function can be used against any table.
F) This function cannot be used in a SELECT statement.

3. What is true about stored procedures?

A) A stored procedure is named PL/SQL block with at least one parameter declaration in the procedure specification.
B) A stored procedure uses the DECLARE keyword in the procedure body to declare formal parameters.
C) A stored procedure uses the DELCLARE keyword in the procedure specification to declare formal parameters.
D) A stored procedure must have at least one executable statement in the procedure body.

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

5. The add_player procedure inserts rows into the PLAYER table. Which command will show this directory dependency?

A) SELECT * FROM USER DEPENDENCIES WHERE REFERENCED_NAME = 'TABLE';
B) SELECT * FROM USER_DEPENDENCIES WHERE REFERENCED_NAME = 'PLAYER';
C) SELECT * FROM USER DEPENDENCIES WHERE REFERENCED_NAME = 'ADD_PLAYER';
D) SELECT * FROM USER_DEPENDENCIES WHERE TYPE = 'DIR';

Solutions: