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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. 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 A is invalidated and recompiles for the first time it is invoked.
C) Procedure B is invalidated and recompiles when invoked.
D) Procedure A is invalidated and recompiles for the second time it is invoked.

3. Which two programming constructs can be grouped within a package? (Choose two)

A) Cursor
B) Trigger
C) View
D) Sequence
E) Constant

4. Procedure PROCESS_EMP references the table EMP.
Procedure UPDATE_EMP updates rows if table EMP through procedure PROCESS_EMP.
There is a remote procedure QUERY_EMP that queries the EMP table through the local
procedure PROCESS_EMP.
The dependency mode is set to TIMESTAMP in this session.
Which two statements are true? (Choose two)

A) If internal logic of procedure PROCESS_EMP is modified and successfully recompiles, QUERY_EMP gets invalidated and will recompile when invoked for the first time.
B) If the signature of procedure PROCESS_EMP is modified and successfully recompiles, the EMP table is invalidated.
C) If internal logic of procedure PROCESS_EMP is modified and successfully recompiles, UPDATE_EMP gets invalidated and will recompile when invoked for the first time.
D) If internal logic of procedure PROCESS_EMP is modified and successfully recompiles, QUERY_EMP gets invalidated and will recompile when invoked for the second time.
E) If the signature of procedure PROCESS_EMP is modified and successfully recompiles, UPDATE_EMP gets invalidated and will recompile when invoked for the first time.

5. Which statements are true? (Choose all that apply)

A) If errors occur during the compilation of a trigger, the trigger is still created.
B) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_TRIGGERS data dictionary view to see the compilation errors.
C) If errors occur during the compilation of a trigger you can use the SHOW ERRORS command within iSQL *Plus to see the compilation errors.
D) If errors occur during the compilation of a trigger you can go into SQL *Plus and query the USER_ERRORS data dictionary view to see compilation errors.

Solutions: