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Oracle9i program with pl/sql Sample Questions:

1. Which statement is valid when removing procedures?

A) Use a drop procedure statement to drop a procedure that is part of a package.
Then recompile the package specification.
B) 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.
C) Use a drop procedure statement to drop a standalone procedure.
D) Use a drop procedure statement to drop a procedure that is part of a package.
Then recompile the package body.

2. 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.

3. What can you do with the DBMS_LOB package?

A) Use the DBMS_LOB.FILEEXISTS function to find the location of a BFILE.
B) Use the DBMS_LOB.WRITE procedure to write data to a BFILE.
C) Use the DBMS_LOBFILENAME function to locate an external BFILE.
D) Use the DBMS_LOB.FILECLOSE procedure to close the file being accessed.

4. 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.

5. Examine this code:
CREATE OR REPLACE PACKAGE comm_package
IS
g_comm NUMBER := 10;
PROCEDURE reset_comm(p_comm IN NUMBER);
END comm_package;
/
User Jones executes the following code at 9:01am: EXECUTE comm_package.g_comm := 15
User Smith executes the following code at 9:05am: EXECUTE comm_paclage.g_comm := 20
Which statement is true?

A) g_comm has a value of 15 at 9:06am for Smith.
B) g_comm has a value of 15 at 9:03 am for both Jones and Smith.
C) g_comm has a value of 15 at 9:06am for Jones.
D) g_comm has a value of 10 at 9:06am for both Jones and Smith.
E) g_comm has a value of 20 at 9:06am for both Jones and Smith.
F) g_comm has a value of 10 at 9:03am for both Jones and Smith

Solutions: