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IBM C2090-730 Exam Syllabus Topics:

IBM DB2 9 Family Fundamentals Sample Questions:

Question 1

The following triggers were defined for a table named SALES in the order shown:
CREATE TRIGGER trigger_a NO CASCADE BEFORE UPDATE ON sales REFERENCING NEW AS new FOR EACH ROW SET new.commission = sale_amt * .05 WHERE invoice = n.invoice;
CREATE TRIGGER trigger_b AFTER INSERT ON sales REFERENCING NEW AS new FOR EACH ROW UPDATE sales SET bill_date = CURRENT DATE + 30 DAYS WHERE invoice = n.invoice;
CREATE TRIGGER trigger_c NO CASCADE BEFORE DELETE ON sales FOR EACH ROW SIGNAL SQLSTATE '75005' SET MESSAGE_TEXT = 'Deletes not allowed!';
Which of the following statements is NOT true?

A. Whenever a row is inserted into the SALES table, the value in the BILL_DATE column is automatically set to 30 days from today
B. Whenever a row in the SALES table is updated, all three triggers are fired but nothing happens because none of the triggers have been coded to trap update operations
C. Each time a row is inserted into the SALES table, trigger TRIGGER_A is fired first, followed by trigger TRIGGER_B
D. Once a row has been added to the SALES table, it cannot be removed

Question 2

Two applications have created a deadlock cycle in the locking subsystem. If lock timeout is set to 30 and both applications were started at the same time, what action will the deadlock detector take when it "wakes up" and discovers the deadlock?

A. It will wait 30 seconds, then rollback the current transactions of both applications if the deadlock has not been resolved
B. It will go back to sleep for 30 seconds, then if the deadlock still exists, it will randomly pick an application and rollback its current transaction
C. It will randomly pick an application and rollback its current transaction
D. Itwill rollback the current transactions of both applications

Question 3

Which of the following deletion rules on CREATE TABLE will allow parent table rows to be deleted if a dependent row exists?

A. ON DELETE SET NO VALUE
B. ON DELETE RESTRICT
C. ON DELETE CASCADE
D. ON DELETE NO ACTION

Question 4

57 Given table T1 has column I1 containing the following data: I1
1
2
3
4
If the following sequence of SQL statements is applied within a single unit of work:
UPDATE t1 SET i1 = 3 WHERE i1 = 2; S
AVEPOINT s1 ON ROLLBACK RETAIN CURSORS;
UPDATE t1 SET i1 = 5 WHERE i1 = 3;
SAVEPOINT s2 ON ROLLBACK RETAIN CURSORS;
INSERT INTO t1 (i1) VALUES (6);
ROLLBACK TO SAVEPOINT s1;
UPDATE t1 SET i1 = 2 WHERE i1 = 4;
COMMIT;
What is the expected sequence of values returned from?
SELECT i1 FROM t1 ORDER BY i1

A. 1, 2, 3, 3
B. 1, 2, 3, 3, 6
C. 1, 2, 2, 5, 6
D. 1, 2, 2, 4

Question 5

Given the following set of statements:
CREATE TABLE tab1 (col1 INTEGER, col2 CHAR(20));
COMMIT;
INSERT INTO tab1 VALUES (123, 'Red');
INSERT INTO tab1 VALUES (456, 'Yellow');
SAVEPOINT s1 ON ROLLBACK RETAIN CURSORS;
DELETE FROM tab1 WHERE col1 = 123;
INSERT INTO tab1 VALUES (789, 'Blue');
ROLLBACK TO SAVEPOINT s1;
INSERT INTO tab1 VALUES (789, 'Green');
UPDATE tab1 SET col2 = NULL WHERE col1 = 789; COMMIT;
Which of the following records would be returned by the following statement?
SELECT * FROM tab1

A. COL1 COL2
123 Red 456 Yellow 789 3 record(s) selected.
B. COL1 COL2
123 Red 456 Yellow 789 Green 3 record(s) selected.
C. COL1 COL2
123 Red 456 Yellow 2 record(s) selected.
D. COL1 COL2
456 Yellow 1 record(s) selected.

Solutions: