IBM C2090-612 Exam Questions

Question 6 of 134

When is a merge scan join a well performing access path?

When the number of qualifying rows of the inner and outer table are both large.

When the query references at least two dimensions and the STARJOIN subsystem parameter is 1.

When the number of rows in the outer table is small and the number of pages accessed in the inner table is small.

When the matching columns of the inner table are in a non-clustering index or the outer table has duplicate qualifying rows.

Correct Answer: A

Question 7 of 134

What trace class will show deadlock information?

Audit class 3.

Statistic class 3.

Accounting class 1.

Performance class 8.

Correct Answer: B

Question 8 of 134

Which DSNZPARM will define the number of RID Blocks in the RID Pool?

NUMTCB

MAXRBLK

CONDBAT

URLGWTH

Correct Answer: B

Question 9 of 134

When DB2 detects at runtime requiring a large amount of data to be read, which prefetch method is used more often?

List prefetch

Dynamic prefetch

Sequential prefetch

Skip sequential prefetch

Correct Answer: B

Question 10 of 134

In order to retain an access path across a rebind which of the following commands could be used?

BIND PLAN

REBIND PACKAGE(PK1) REOPT(ONCE)

BIND PACKAGE (PK1) EXPLAIN(YES)

REBIND PACKAGE (PK1) PLANMGMT(BASIC)

Correct Answer: D