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IBM DB2 10.1 Advanced DBA for Linux UNIX and Windows Sample Questions:

1. A query against the system catalog revealed that data for a table named SALES in a partitioned database is distributed as follows:

What can be done to improve the performance of a query that joins SALES and DATE_DIM tables (where SALES is a fact table and DATE_DIM is a dimension table) using the DATE_ID column?

A) Create a replicated table REPL_SALES from the SALES table, refresh REPL_SALES table, create index on DATE_ID column in theREPL_SALES table, and collect statistics on REPL_SALES table.
B) Reload table DATE_DIM and use only one partition with a collocated join to the SALES table using the primary key DATE_ID.
C) Create a replicated table REPL_DATE_DIM from the DATE_DIM table, refresh REPL_DATE_DIM table, create index on DATE_ID column in theREPL_DATE_DIM table, and collect statistics on REPL_DATE_DIM table.
D) Reload table SALES and use only one partition with a collocated join to the DATE_DIM table using the primary key DATE_ID.

2. When will the existing data for a new partition be visible to applications querying a range-partitioned table?

A) After the ALTER TABLE ... ATTACH and SET INTEGRITY statements are executed.
B) After the ALTER TABLE ... ADD statement is executed.
C) After the ALTER TABLE ... ATTACH statement is executed.
D) After the ALTER TABLE ... ADD and SET INTEGRITY statements are executed.

3. A table named SALES was created as follows:

Assuming all table spaces required already exist, which statement(s) must be executed to add a new partition that already contains data for the first quarter of 2013 to the SALES table and leave the table accessible?

A) ALTER TABLE sales ADD PARTITION part_2013q1
STARTING ('01/01/2013') ENDING ('03/31/2013') IN ts5;
SET INTEGRITY FOR sales IMMEDIATE CHECKED;
B) ALTER TABLE sales ATTACH PARTITION part_2013q1
STARTING ('01/01/2013') ENDING ('03/31/2013')
FROM TABLE q12013_sales;
SET INTEGRITY FOR sales IMMEDIATE CHECKED;
C) ALTER TABLE sales ADD PARTITION part_2013q1
STARTING ('01/01/2013') ENDING ('03/31/2013') IN ts5;
D) ALTER TABLE sales ATTACH PARTITION part_2013q1
STARTING ('01/01/2013') ENDING ('03/31/2013')
FROM TABLE q12013_sales;

4. The following query is executed frequently against the SALES table: SELECT sales_id, sales_date, sales_person FROM sales; If data in the SALES_ID column is unique, which statement will create an index for optimal query performance and ensure uniqueness of the SALES_ID column?

A) CREATE UNIQUE INDEX sales_idx ON sales (sales_id) INCLUDE (sales_date, sales_person)
B) CREATE INDEX sales_idx ON sales (sales_id) INCLUDE (sales_date, sales_person)
C) CREATE UNIQUE INDEX sales_idx ON sales (sales_id, sales_date, sales_person)
D) CREATE INDEX sales_idx ON sales (sales_id, sales_date, sales_person)

5. What will occur when a database administrator adds a new automatic storage path to an existing storage group?

A) Existing table spaces will not consume storage on the new path.
B) New table spaces will start consuming storage on the new path.
C) The storage group will be placed in "Rebalance Pending" mode.
D) DB2 will verify that space is available on the storage path specified.

Solutions: