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IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

1. Given that tables T1 and T2 contain the following rows:
Table T1: C1 C2
5 4 5 2 5 5 Table T2: C1 C2
5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2 ?

A) SELECT * FROM T1 EXCEPT SELECT * FROM T2
B) SELECT * FROM T1 MINUS SELECT * FROM T2
C) SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1
D) SELECT * FROM T1 NOT EXISTS SELECT * FROM T2

2. When does a view get populated?

A) Any time an executable SQL statement references it
B) The first time any executable SQL statement references it
C) When it is referenced in an INSERT statement
D) When it is created

3. Given the following tables:
YEAR_2006 EMPID NAME
1 Jagger, Mick 2 Richards, Keith 3 Wood, Ronnie 4 Watts, Charlie 5 Jones, Darryl 6 Leavell, Chuck YEAR_1962 EMPID NAME
1 Jagger, Mick 2 Richards, Keith 3 Jones, Brian 4 Wyman, Bill 5 Chapman, Tony 6 Stewart, Ian
If the following SQL statement is executed, how many rows will be returned?
SELECT name FROM year_2006 UNION SELECT name FROM year_1962

A) 6
B) 12
C) 10
D) 0

4. Which of the following would NOT provide access to data stored in table TABLE1 using the name T1?

A) A schema named T1 that references table TABLE1
B) An alias named T1 that references a view named V1 that references table TABLE1
C) An alias named T1 that references table TABLE1
D) A view named T1 that references table TABLE1

5. If a view named V1 is created in such a way that it references every column in a table named EMPLOYEE except a column named SALARY, which of the following is NOT an accurate statement?

A) View V1 can be used as a data source for other views
B) All data, except SALARY data that is stored in the EMPLOYEE table is copied to the physical location associated with view V1
C) View V1 does not have to reside in the same schema as the EMPLOYEE table
D) View V1 can be used in the same context as the EMPLOYEE table for all data retrieval operations that do not acquire SALARY information

Solutions: