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IBM Assessment: DB2 9.7 Advanced DBA for LUW Sample Questions:

1. Which description is correct when discussing the DB2_MEM_TUNING_RANGE registry variable?

A) It is recommended that this variable be used to set the maximum percentage of memory that DB2 can use on the system.
B) It is recommended to set this variable only when using STMM, when DATABASE_MEMORY is set to AUTOMATIC, and if insufficient system memory problems are occurring.
C) It is recommended that this variable be enabled at all times in order to prevent DB2 from taking too much physical memory.
D) It is recommended to set this variable only when the Self-Tuning Memory Manager (STMM) is disabled.

2. A database and a table space were created using the following commands:

Afterwards, two tables were created in table space TBSP1 and both tables were populated with 100,000 rows. If a DBA decides that database MYDB should use automatic storage, which command(s) are needed to convert both the database and table space TBSP1?

A) ALTER DATABASE mydb AUTOMATIC STORAGE YES ON ?mnt/path_1? ?mnt/path_2?
B) ALTER DATABASE mydb AUTOMATIC STORAGE YES ON ?mnt/path_1? ?mnt/path_2? ALTER TABLESPACE tbsp1 MANAGED BY AUTOMATIC STORAGE;
C) ALTER DATABASE mydb ADD STORAGE ON ?mnt/path_1? ?mnt/path_2? ALTER TABLESPACE tbsp1 MANAGED BY AUTOMATIC STORAGE;
D) ALTER DATABASE mydb ADD STORAGE ON ?mnt/path_1? ?mnt/path_2?

3. What steps, in the correct order, are performed by the SQL and XQuery compilers to generate executable code for non-federated queries?

A) parse query; check semantics; rewrite query; build access plan
B) check semantics; parse query; rewrite query; build access plan
C) check semantics; parse query; build access plan; pushdown predicates; execute access plan
D) parse query; rewrite query; check semantics; pushdown predicates; execute access plan

4. The DBA needs to create a table with key columns YEARMONTH and YEAR. This table needs to be partitioned by column YEARMONTH with three months per data partition. Additionally, data needs to be organized by column YEAR, so that all rows within any three month date range are clustered together based on 12 months of data. Which CREATE TABLE statement will accomplish this objective?

A) CREATE TABLE tab1
(yearmonth INT,
year CHAR(2))
PARTITION BY RANGE (year) (STARTING 201001 ENDING 201012 EVERY 3)
ORGANIZE BY DIMENSIONS (yearmonth))
B) CREATE TABLE tab1
(yearmonth INT,
year CHAR(2))
PARTITION BY RANGE (yearmonth) (STARTING 201001 ENDING 201012 EVERY 12)
ORGANIZE BY DIMENSIONS (year))
C) CREATE TABLE tab1
(yearmonth INT,
year CHAR(2))
PARTITION BY RANGE (year) (STARTING 201001 ENDING 201012 EVERY 12)
ORGANIZE BY DIMENSIONS (yearmonth))
D) CREATE TABLE tab1
(yearmonth INT,
year CHAR(2))
PARTITION BY RANGE (yearmonth) (STARTING 201001 ENDING 201012 EVERY 3)
ORGANIZE BY DIMENSIONS (year))

5. 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 and C3 together, which statement(s) will create index(es) that will provide optimal query performance?

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

Solutions: