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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) Employee 108 has his email name updated based on the return result of the function.
C) The SQL statement executes successfully, because UPDATE and DELETE statements are ignoring in stored functions called from SQL expressions.
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.

2. Local procedure A calls remote procedure B.
Procedure B was compiled at 8 A.M.
Procedure A was modified and recompiled at 9 A.M. Remote procedure B was later modified and recompiled at 11 A.M.
The dependency mode is set to TIMESTAMP.
What happens when procedure A is invoked at 1 P.M?

A) Procedure B is invalidated and recompiles when invoked.
B) There is no affect on procedure A and it runs successfully.
C) Procedure A is invalidated and recompiles for the first time it is invoked.
D) Procedure A is invalidated and recompiles for the second time it is invoked.

3. Which two tables or views track object dependencies? (Choose two)

A) USER_DEPENDENCIES
B) IDEPTREE
C) USER_DEPTREE
D) USER_DEPENDS
E) USER_IDEPTREE

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

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

5. Given a function CALCTAX:
CREATE OR REPLACE FUNCTION calctax (sal NUMBER) RETURN NUMBER
IS
BEGIN
RETURN (sal * 0.05);
END;
If you want to run the above function from the SQL *Plus prompt, which statement is true?

A) You need to create a SQL *Plus environment variable X and issue the command EXECUTE :X := CALCTAX;
B) You need to create a SQL *Plus environment variable X and issue the command :X := CALCTAX(1000);.
C) You need to execute the command CALCTAX(1000);.
D) You need to create a SQL *Plus environment variable X and issue the command EXECUTE :X := CALCTAX(1000);
E) You need to execute the command EXECUTE FUNCTION calctax;.

Solutions: