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IBM 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 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.
C) The row will be found with a different ROW CHANGE TOKEN and Transaction 2 will overwrite the values set in transaction 1.
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. What are two ways to execute an SQL procedure using IBM Data Studio? (Choose two.)

A) Open a SQL editor, enter the appropriate CALL statement and hit the Run button.
B) Right-click on the SQL procedure and select the Run option from the menu.
C) Open a Command Line Processor window from IBM Data Studio and execute the appropriate CALL statement.
D) Right-click on the SQL procedure and select the Open Visual Explain option from the menu.
E) Open a text editor, enter the appropriate CALL statement and hit the run button.

3. Given the following statements in an SQL procedure:

Which of the following assignment statements is valid?

A) SET c1 = CURSOR FOR VALUES (1, 2, 3);
B) SET c1 = VALUES (1, 2, 3);
C) c1 = CURSOR VALUES (1, 2, 3);
D) SET VALUES (1, 2, 3) for CURSOR c1;

4. Which statement will let you use the result set from the nested procedure CALLEE?

A) BIND RESULT SET WITH PARAMETERS FOR PROCEDURE callee;
B) ASSOCIATE RESULT SET LOCATOR( loc1) WITH PROCEDURE callee;
C) INSERT RESULT SET FROM callee INTO CURSOR c1;
D) SELECT * FROM callee;

5. Which object is used to return a result set from an SQL procedure?

A) Temporary table
B) Scratchpad
C) Array
D) Cursor

Solutions: