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Oracle9i program with pl/sql Sample Questions:

1. Examine this code:
CREATE OR REPLACE TRIGGER update_emp
AFTER UPDATE ON emp
BEGIN
INSERT INTO audit_table (who, dated)
VALUES (USER, SYSDATE);
END;
You issue an UPDATE command in the EMP table that results in changing 10 rows.
How many rows are inserted into the AUDIT_TABLE?

A) 1
B) A value equal to the number of rows in the EMP table.
C) 10
D) None

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

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

3. To be callable from a SQL expression, a user-defined function must do what?

A) Use the positional notation for parameters.
B) Be stored only in the database.
C) Return a BOOLEAN or VARCHAR2 data type.
D) Have both IN and OUT parameters.

4. Examine this code:
CREATE OR REPLACE PROCEDURE add_dept
( p_name departments.department_name%TYPE DEFAULT 'unknown',
p_loc departments.location_id%TYPE DEFAULT 1700)
IS
BEGIN
INSERT INTO departments(department_id, department_name,
loclation_id)
VALUES(dept_seq.NEXTVAL,p_name, p_loc);
END add_dept;
/
You created the add_dept procedure above, and you now invoke the procedure in SQL *Plus.
Which four are valid invocations? (Choose four)

A) EXECUTE add_dept('2500', p_loc =>2500)
B) EXECUTE add_dept('Education', 2500)
C) EXECUTE add_dept(p_loc=>2500)
D) EXECUTE add_dept(p_name=>'Education', 2500)
E) EXECUTE add_dept(p_loc=>2500, p_name=>'Education')

5. You need to implement a virtual private database (vpd). In order to have the vpd functionality, a trigger is required to fire when every user initiates a session in the database.What type of trigger needs to be created?

A) Application trigger
B) DML trigger
C) INSTEAD OF trigger
D) System event trigger

Solutions: