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IBM A2090-730 Exam Syllabus Topics:

IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

1. Application A holds an Exclusive lock on table TAB1 and needs to acquire an Exclusive lock on table TAB2. Application B holds an Exclusive lock on table TAB2 and needs to acquire an Exclusive lock on table TAB1. If lock timeout is set to -1 and both applications are using the Read
Stability isolation level, which of the following will occur?

A) Applications A and B will cause a deadlock situation
B) Application B will read the copy of table TAB1 that was loaded into memory when Application A first read it
C) Application B will read the data in table TAB1 and see uncommitted changes made by Application A
D) Application B will be placed in a lock-wait state until ApplicationA releases its lock

2. Assuming table TAB1 contains 100 rows, which of the following queries will return only half of the rows available?

A) SELECT * FROM tab1 FETCH FIRST 50 ROWS ONLY
B) SELECT * FROM tab1 FIND FIRST 50 ROWS
C) SELECT * FROM tab1 MAXROWS 50
D) SELECT * FROM tab1 WHILE ROW_NUM < 50

3. A sequence was created with the DDL statement shown below:
CREATE SEQUENCE my_sequence CACHE 10 ORDER
The following statements are successfully executed in sequence through separate database connections:
CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar CONNECTION2 - VALUES NEXT VALUE FOR my_sequence INTO :con2hvar CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar
What is the current value of the :con1hvar host variable?

A) 11
B) 3
C) 30
D) 2

4. The EMPLOYEE table contains the following information:
EMPNO NAME WORKDEPT
101 SAM A11 102 JOHN C12 103 JANE 104 PAT Remote 105 ANNE 106 BOB A11
The MANAGER table contains the following information:
MGRID NAME DEPTNO EMPCOUNT
1 WU B01 2 JONES A11 3 CHEN - 4 SMITH - 5 THOMAS C12
After this statement is executed:
UPDATE manager m SET empcount = (SELECT COUNT(workdept) FROM employee e WHERE workdept=m.deptno)
What is the result of the following query?
SELECT mgrid, empcount FROM MANAGER WHERE empcount IS NOT NULL ORDER BY mgrid

A) MGRID EMPCOUNT ----- -------- 1 0 22 3 0 4 0 5 1
B) MGRID EMPCOUNT ----- -------- 1 3 2 33 3 4 3 5 3
C) MGRID EMPCOUNT ----- -------- 1 0 22 5 1
D) MGRID EMPCOUNT ----- -------- 1 0 22 3 2 4 2 5 1

5. Which of the following CREATE TABLE statements will NOT be successful?

A) CREATE TABLE t1 (c1 XML, c2 XML)
B) CREATE TABLE t1 (c1 XML NOT NULL, c2CHAR(20))
C) CREATE TABLE t1 (c1 XML CHECK (c1 IS VALIDATED), c2 INT)
D) CREATE TABLE t1 (c1 XML NOT NULL UNIQUE, c2 INT)

Solutions: