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Exam Number/Code : A2090-612
Exam Name : Assessment: DB2 10 DBA for z/OS Assessment
Questions and Answers : 134 Q&As
Update Time: 2014-06-05

QUESTION NO: 1
Workload Manager (WLM) manages how many concurrent stored procedures can run in an
address space and the number of concurrent stored procedures in an address space cannot
exceed the value of the NUMTCB parameter. Which statement about the value of NUMTCB is
correct?
A. NUMTCB parameter must be set to 1 for Java stored procedures.
B. NUMTCB parameter must be set to 1 for REXX stored procedures.
C. NUMTCB parameter can be a value greater than 1 for native SQL stored procedures.
D. NUMTCB parameter can be a value greater than 1 when a stored procedure invokes DB2
utilities.
Answer: B


QUESTION NO: 2
If a single row of the PLAN_TABLE has a 'Y' value in more than one of the sort composite
columns, what is indicated?
A. The next sort step will perform two sorts.
B. There are multiple sorts in the plan step.
C. One sort in the plan step will accomplish two tasks.
D. Two sorts are performed on the new table of a star join.
Answer: C


QUESTION NO: 3
What IBM provided stored procedure will access DB2 real time statistics tables?
A. DSNAEXP
B. DSNAIMS
C. DSNACCOX
D. DSNLEUSR
Answer: C


QUESTION NO: 4
The EXPLAIN STMTCACHE ALL statement provides information about SQL tuning. Which
information is part of the DSN_STATEMENT_CACHE_TABLE?
A. Filter factor information.
B. Stage 1 and stage 2 information.
C. Number of columns used in an index.
D. Number of times an SQL statement is executed.
Answer: D


QUESTION NO: 5
Which two of the following DB2 performance features will ignore clustering in favor of faster insert
performance? (Choose two.)
A. Append
B. Inline LOBs
C. Member cluster
D. Volatile table
E. Include columns
Answer: A,C


QUESTION NO: 6
When is a merge scan join a well performing access path?
A. When the number of qualifying rows of the inner and outer table are both large.
B. When the query references at least two dimensions and the STARJOIN subsystem parameter
is 1.
C. When the number of rows in the outer table is small and the number of pages accessed in the
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inner table is small.
D. When the matching columns of the inner table are in a non-clustering index or the outer table
has duplicate qualifying rows.
Answer: A