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IBM DB2 9.7 Advanced DBA for LUW Sample Questions:

1. Table T1 was created by executing the following statement:

Immediately after creation, table T1 was populated with 10 rows. Later, user USER1 ran an application that inserted 100,000 rows into table T1. The following query is frequently ran against the T1 table:
SELECT deptno, empno, deptname FROM t1 WHERE deptno = 'EN' AND empno = '123' Assuming current statics exist for the table and index, which index will provide optimal performance for this query?

A) CREATE INDEX idx1 ON t1 (deptno, empno) INCLUDE (deptname)
B) CREATE INDEX idx1 ON t1 (deptno)
C) CREATE INDEX idx1 ON t1 (deptno) INCLUDE (empno)
D) CREATE INDEX idx1 ON t1 (deptno, empno)

2. A DBA migrating an existing database to DB2 9.7 wants to allow the primary and secondary recovery logs to be used with non-buffered IO. Which statement is true?

A) The DB2_LOGGER_AUTO_BUFFERED registry variable must be set to YES.
B) The DB2_LOGGER_BUFFERED registry variable must be set to OFF.
C) This behavior is automatically enabled by default.
D) The DB2_LOGGER_NON_BUFFERED_IO registry variable must be set to AUTO.

3. Which method should be used to construct an LBAC security component that represents a person's level of trust?

A) ORDER
B) TREE
C) ARRAY
D) SET

4. Which option of the ALTER TABLE statement tells the DB2 optimizer to use an index scan on a table that might vary in size at run time from being empty to containing a large number of rows?

A) CARDINALITY VOLATILE
B) VOLATILE
C) INDEXSCAN
D) CURRENT CARDINALITY

5. In which two environments would intra-partition parallelism be used? (Choose two.)

A) Multiple database partitions, single processor core
B) Single database partition, multiple processor cores
C) Single database partition, single processor core
D) Multiple database partitions, multiple processor cores

Solutions: