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IBM DB2 9.7 Advanced DBA for LUW Sample Questions:

1. 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) INDEXSCAN
B) CURRENT CARDINALITY
C) CARDINALITY VOLATILE
D) VOLATILE

2. Table TAB1 was created using the following statement: CREATE TABLE tab1 (c1 INT, c2 INT, c3 INT, c4 INT, c5 INT); If column C1 is unique and queries typically access columns C1, C2, C3 and C4 together, which statement(s) will create index(es) that will provide optimal query performance?

A) CREATE UNIQUE INDEX xtab1 ON tab1 (c1); CREATE INDEX xtab2 ON tab1 (c2) INCLUDE (c3, c4);
B) CREATE UNIQUE INDEX xtab1 ON tab1 (c3) INCLUDE (c1, c2, c4);
C) CREATE UNIQUE INDEX xtab1 ON tab1 (c1) INCLUDE (c2, c3, c4);
D) CREATE UNIQUE INDEX xtab1 ON tab1 (c4, c3, c2, c1);

3. Given an HADR pair configured with HADR_PEER_WINDOW set to 300 seconds. If the standby server looses communication with the primary at 11:02:03 am, when can the following command be run so that the standby server will successfully be promoted to be a primary server?
TAKEOVER HADR ON DB mydb BY FORCE PEER WINDOW ONLY

A) Any time after 11:07:04 am
B) Any time after 11:07:03 am
C) Any time before 11:07:03 am
D) Any time after 11:02:03 am

4. Which statement is correct about statistical views?

A) A statistical view provides the optimizer with more accurate cardinality estimates.
B) A statistical view is created by executing runstats on a regular view.
C) A statistical view provides the optimizer with additional correlation statistics.
D) A statistical view holds information about the system catalog statistical tables.

5. The table STORESALES was created with the following statement:

Which is true when the following statement is executed?
CREATE UNIQUE INDEX index_partIDcustID ON storesales (partID, custID)

A) A non-unique partitioned index is created successfully.
B) The index creation fails because it does not contain the column from the table partitioning key.
C) A unique non-partitioned index is created successfully.
D) A unique partitioned index is created successfully.

Solutions: