IBM DB2 9 Family Fundamentals : C2090-730

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IBM C2090-730 Exam Syllabus Topics:

IBM DB2 9 Family Fundamentals Sample Questions:

Question 1

If the following SQL statements are executed in the order shown:
CREATE TABLE orders (order_num INTEGER NOT NULL, buyer_name VARCHAR(35), amount NUMERIC(5,2));
CREATE UNIQUE INDEX idx_orderno ON orders (order_num);
Which of the following describes the resulting behavior?

A. Every ORDER_NUM value entered must be unique; no other index can be created for the ORDERS table that reference the ORDER_NUM column
B. Duplicate ORDER_NUM values are allowed; no other index can be created for the ORDERS table that reference the ORDER_NUM column
C. Every ORDER_NUM value entered must be unique; whenever the ORDERS table is queried rows will be displayed in no particular order
D. Every ORDER_NUM value entered must be unique; whenever the ORDERS table is queried rows should be displayed in order of increasing ORDER_NUM values

Question 2

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. 0
B. 12
C. 10
D. 6

Question 3

A sequence was created with the DDL statement shown below:
CREATE SEQUENCE my_seq START WITH 10 INCREMENT BY 10 CACHE 10
User USER1 successfully executes the following statements in the order shown:
VALUES NEXT VALUE FOR my_seq INTO :hvar; VALUES NEXT VALUE FOR my_seq INTO :hvar;
User USER2 successfully executes the following statements in the order shown:
ALTER SEQUENCE my_seq RESTART WITH 5 INCREMENT BY 5 CACHE 5; VALUES NEXT VALUE FOR my_seq INTO :hvar;
After users USER1 and USER2 are finished, user USER3 executes the following query:
SELECT NEXT VALUE FOR my_seq FROM sysibm.sysdummy1
What value will be returned by the query?

A. 30
B. 5
C. 10
D. 20

Question 4

What type of constraint is used to ensure that each row inserted into the EMPLOYEE table with a value in the WORKDEPT column has a row with a corresponding value in the DEPTNO column of the DEPARTMENT table?

A. A foreign key reference from the DEPARTMENT tables DEPTNO column to the WORKDEPT column of the EMPLOYEE table
B. A foreign key reference from the EMPLOYEE tables WORKDEPT column to the DEPTNO column of the DEPARTMENT table
C. A check constraint on the EMPLOYEE table
D. A unique constraint on the EMPLOYEE table WORKDEPT column

Question 5

Which of the following will be a consequence of defining the column IDCOL2 in TABLE2 as a foreign key referencing the primary key (IDCOL1) of TABLE1?

A. When inserting a row in TABLE2, the only values that DB2 will allow for IDCOL2 are the existing values of IDCOL1.
B. When inserting a row in TABLE2, DB2 will only allow foreign values forIDCOL2, that is values which do not exist in IDCOL1.
C. DB2 will no longer allow updating the value of IDCOL1 in TABLE1.
D. When a SELECT statement joins TABLE1 with TABLE2, DB2 will automatically add the condition TABLE1.IDCOL1=TABLE2.IDCOL2 if not specified in the statement.

Solutions: