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IBM Assessment: DB2 9.7 SQL Procedure Developer Sample Questions:

1. Using Optimistic Locking, both Transaction 1 and Transaction 2 have read the same row including the RID_BIT and ROW CHANGE TOKEN values. Transaction 1 updates the row after ensuring that the row has not changed after the previous SELECT by adding a RID_BIT and ROW CHANGE TOKEN predicate to the UPDATE statement. Transaction 2 now tries to update that same row using the same predicate as transaction 1. What will be the result?

A) The row will not be found because the value of the ROW CHANGE TOKEN has changed in regard to the UPDATE of transaction 1. Transaction 2 has to retry in order to retrieve the current data.
B) The row will be found with the same ROW CHANGE TOKEN. Transaction 2 will now insert its values replacing those of transaction 1.
C) The row will not be found because the value of the ROW CHANGE TOKEN has changed in regard to the UPDATE of transaction 1. Transaction 2 will complete with an insert of a new row.
D) The row will be found with a different ROW CHANGE TOKEN and Transaction 2 will overwrite the values set in transaction 1.

2. Click the Exhibit button.

The table and triggers in the exhibit have been created successfully, when the statements shown below are executed.
INSERT INTO emp_hours VALUES('KAY', '9:00', '17:00');
INSERT INTO emp_hours (emp_name, starting) VALUES('BILL', '9:00');
What is the result?

A) Table EMP_HOURS will contain this row: BILL 9:00:00 AM 17:00:00 PM
B) Table EMP_HOURS will contain this row: BILL 9:00:00 AM
C) Table EMP_HOURS will contain these rows: KAY 9:00:00 AM 5:00:00 PM BILL 9:00:00 AM
D) Table EMP_HOURS will contain these rows: KAY 9:00:00 AM 5:00:00 PM BILL 9:00:00 AM 10:00:00 AM

3. Click the Exhibit button.

A trigger was created as shown in the exhibit.
The UPDATE statement shown below is executed. UPDATE dept SET sales_id = '300' WHERE sales_id = '200'
How many row(s) are updated in the EMPLOYEE table?

A) 3
B) 2
C) 0
D) 1

4. Which two types of stored procedures can be developed in IBM Data Studio? (Choose two.)

A) SQL
B) Perl
C) Ruby
D) PL/SQL
E) PHP

5. Which of the following can be done while debugging a SQL procedure with IBM Data Studio?

A) Re-execute the current statement.
B) Edit the procedure and continue.
C) Change the order of statements being executed.
D) Change the value of any variables used.

Solutions: