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Oracle9i program with pl/sql Sample Questions:

1. Examine this code
CREATE OR REPLACE PROCEDURE load bfile (p_flle_loc IN VARCHAR2)
IS
V_file BFILE;
V_filename VARCHAR2 (16);
CURSOR emp_cursor IS
SELECT employee_id
FROM employees
WHERE Job_id = 'IT_PROG'
FOR UPDATE;
BEGIN
FOR emp_record IN emp_cursor LOOP
V_filename:= emp_record.employee_id || '.GIF';
V_file := BFILENAME(p_flle_loc, v_filename);
END LOOP;
END;
/
What does the BFILENAME function do?

A) It returns a BFILE locator that is associated with a physical LOB binary file on the server's file system
B) It checks for the existence of an external BFILE
C) It creates a directory object for use with the external BFILEs
D) It reads data from an external BFILE

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

3. You create a DML trigger. For the timing information, which are valid with a DML trigger?

A) IN PLACE OF
B) ON STATEMENT EXECUTION
C) BEFORE
D) DURING
E) ON SHUTDOWN

4. Examine this package:
CREATE OR REPLACE PACKAGE discounts
IS
g_id NUMBER := 7829;
discount_rate NUMBER := 0.00;
PROCEDURE display_price (p_price NUMBER);
END discounts;
/
CREATE OR REPLACE PACKAGE BODY discounts
IS
PROCEDURE display_price (p_price NUMBER)
IS
BEGIN
DBMS_OUTPUT.PUT_LINE('Discounted '||
TO_CHAR(p_price*NVL(discount_rate, 1)));
END display_price;
BEGIN
discount_rate := 0.10;
END discounts;
/
Which statement is true?

A) The value of DISCOUNT_RATE is set to 0.10 each time the package is invoked in a session.
B) The value of DISCOUNT_RATE always remains 0.00 in a session.
C) The value of DISCOUNT_RATE is set to 0.10 when the package is invoked for the first time in a session.
D) The value of DISCOUNT_RATE is set to 1.00 each time the procedure DISPLAY_PRICE is invoked.

5. Which statement is valid when removing procedures?

A) For faster removal and re-creation, do not use a drop procedure statement.
Instead, recompile the procedure using the alter procedure statement with the REUSE SETTINGS
clause.
B) Use a drop procedure statement to drop a standalone procedure.
C) Use a drop procedure statement to drop a procedure that is part of a package.
Then recompile the package specification.
D) Use a drop procedure statement to drop a procedure that is part of a package.
Then recompile the package body.

Solutions: