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Oracle9i program with pl/sql Sample Questions:

1. You have the following table:
CREATE TABLE Emp_log ( Emp_id NUMBER Log_date DATE, New_salary NUMBER, Action VARCHAR(20));
You have the following data in the EMPLOYEES table:
EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID
100 King 24000 90 101 Kochhar 17000 90 102 De Haan 17000 90 103 Hunold 9000 60 104 Ernst 6000 60 105 Austin 4800 60 106 Pataballa 4800 60 107 Lorentz 4200 60 108 Greenberg 12000 100 201 Hartstein 13000 20 202 Fay 6000 20
You create this trigger:
CREATE OR REPLACE TRIGGER Log_salary_increase AFTER UPDATE ON employees FOR EACH ROW WHEN (:new.Salary > 1000) BEGIN INSERT INTO Emp_log (Emp_id, Log_date, New_Salary, Action) VALUES (new.Employee_id, SYSDATE, :new.SALary, 'NEW SAL'); END /
Then, you enter the following SQL statement:
UPDATE Employee SET Salary = Salary + 1000.0 Where Department_id = 20M
What are the result in the EMP_LOG table?
A EMP_ID LOG_DATE NEW_SALARY ACTION
201 24-SEP-02 13000 NEW SAL 202 24-SEP-02 600 NEW SAL

A) EMP_ID LOG_DATE NEW_SALARY ACTION
201 24-SEP-02 NEW SAL 202 24-SEP-02 NEW SAL
B) EMP_ID LOG_DATE NEW_SALARY ACTION
201 24-SEP-02 14000 NEW SAL 202 24-SEP-02 7000 NEW SAL
C) No rows are inserted.

2. 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) DML trigger
B) INSTEAD OF trigger
C) System event trigger
D) Application trigger

3. How can you migrate from a LONG to a LOB data type for a column?

A) Use the DBMS_LOB.MIGRATE procedure.
B) Use the UTL_MANAGE_LOMIGRATE procedure.
C) Use the DBMS_MANAGE_LOB.MIGRATE procedure.
D) You cannot migrate from a LONG to a LOB date type for a column.
E) Use the ALTER TABLE command.

4. Consider this scenario
A procedure X references a view Y that is based on a table Z .
Which two statements are true? (Choose two.)

A) Y is an indirect dependent of Z
B) Z is an indirect dependent of Y
C) Z is a direct dependent of X
D) Y is a direct dependent of X
E) Y is an indirect dependent of X
F) Y is a referenced object

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

Solutions: