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IBM DB2 9 Family Fundamentals Sample Questions:

1. Given the following table and XML data stored in the CONTACTINFO column:
CREATE TABLE clients(
id INT PRIMARY KEY NOT NULL,
name VARCHAR(50),
status VARCHAR(10),
contactinfo XML)
<Client>
<Address>
<street>25 EastCreek</street>
<city>Toronto</city>
<prov-state>Ontario</prov-state>
<pcode-zip>M8X-3T6</pcode-zip>
</Address>
<phone>
<work>4165551358</work>
<home>9051112222</home>
<fax>9051112222</fax>
</phone>
<preferredcontact>by fax</preferredcontact>
</Client>
What is the result of the following XQuery expression?
for $y in db2-fn:xmlcolumn('CLIENTS.CONTACTINFO')/Client//fax return $y

A) No results because theXQuery expression is not a valid FLWOR expression
B) No results because there is no <fax> child element of <Client>
C) <fax>9051112222</fax>
D) 9051112222

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

3. What does the following statement do? GRANT REFERENCES (col1, col2) ON TABLE table1 TO user1 WITH GRANT OPTION

A) Gives user USER1 the ability to refer to COL1 and COL2 of table TABLE1 in views, along with the ability to give this authority to other users and groups.
B) Gives user USER1 the ability to define a referential constraint on table TABLE1 using columns COL1 and COL2 as the foreign key of the constraint.
C) Gives user USER1 the ability to define a referential constraint on table TABLE1 using columns COL1 and COL2 as the parent key of the constraint.
D) Gives user USER1 the ability to refer to COL1 and COL2 of table TABLE1 in queries, along with the ability to give this authority to other users and groups.

4. Given the following two tables:
NAMES
NAME NUMBER
Wayne Gretzky 99 Jaromir Jagr 68 Bobby Orr 4 Bobby Hull 23 Brett Hull 16 Mario Lemieux 66 Mark Messier 11
POINTS
NAME POINTS
Wayne Gretzky 244 Jaromir Jagr 168 Bobby Orr 129 Brett Hull 121 Mario Lemieux 189 Joe Sakic 94
Which of the following statements will display the player name, number, and points for all players that have scored points?

A) SELECT p.name,n.number, p.points FROM names n FULL OUTER JOIN points p ON n.name = p.name
B) SELECT p.name,n.number, p.points FROM names n RIGHT OUTER JOIN points p ON n.name = p.name
C) SELECT p.name,n.number, p.points FROM names n LEFT OUTER JOIN points p ON n.name = p.name
D) SELECT p.name,n.number, p.points FROM names n INNER JOIN points p ON n.name = p.name

5. What is the maximum size that can be specified when creating an XML column in a DB2 table?

A) No size is specified
B) The buffer pool size
C) The extent size for the table space
D) The page size for the table space

Solutions: