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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 will complete with an insert of a new row.
B) The row will be found with a different ROW CHANGE TOKEN and Transaction 2 will overwrite the values set in 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 has to retry in order to retrieve the current data.
D) The row will be found with the same ROW CHANGE TOKEN. Transaction 2 will now insert its values replacing those of transaction 1.

2. Given the following DDL:

what will the SALARY be?

A) salary * 1.05
B) salary * 1.03
C) salary * 1.10
D) salary * 1.50

3. Click the Exhibit button.

A user-defined function was created using the statement shown in the exhibit. Which additional option can be added to the CREATE FUNCTION statement to tell the optimizer that the function does not always return the same results for a given argument value?

A) NOT FENCED
B) STATIC DISPATCH
C) NO EXTERNAL ACTION
D) NOT DETERMINISTIC

4. Which statement will create a scalar function named FCN1?

A) CREATE FUNCTION fcn1(v1 CHAR(3)) RETURNS ROW CONTAINING CHAR(3) ?CREATE FUNCTION fcn1(v1 CHAR(3)) RETURNS ROW CONTAINING CHAR(3)
B) CREATE FUNCTION fcn1(v1 CHAR(3)) RETURNS CHAR(3) ?CREATE FUNCTION fcn1(v1 CHAR(3)) RETURNS CHAR(3)
C) CREATE SCALAR FUNCTION fcn1(v1 CHAR(3)) RETURNS ROW CONTAINING CHAR(3) ?CREATE SCALAR FUNCTION fcn1(v1 CHAR(3)) RETURNS ROW CONTAINING CHAR(3)
D) CREATE SCALAR FUNCTION fcn1(v1 CHAR(3)) RETURNS CHAR(3) ?CREATE SCALAR FUNCTION fcn1(v1 CHAR(3)) RETURNS CHAR(3)

5. Given the variable declaration shown below: DECLARE v_mydate DATE; Which statement will assign a value to the variable V_MYDATE?

A) VALUES (08262010) INTO v_mydate;
B) SELECT CURRENT DATE INTO v_mydate FROM SYSIBM.SYSDUMMY1;
C) VALUES CURRENT TIMESTAMP INTO v_mydate;
D) SELECT CURRENT TIMESTAMP INTO v_mydate FROM SYSIBM.SYSDUMMY1;

Solutions: