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IBM Assessment: DB2 10.1 Advanced DBA for LUW Sample Questions:

1. Which statement about the initiation of parallel I/O is correct?

A) For read-ahead prefetching, each list of data pages is divided into smaller lists according to extent boundaries and assigned to different I/O servers.
B) For list prefetching, each list of data pages is divided into smaller lists according to extent boundaries and assigned to different I/O servers.
C) For sequential prefetching, parallel I/O is initiated when the extent size is a multiple of the prefetch size for a table space. Each prefetch request is divided into smaller requests and assigned to different I/O servers.
D) For sequential prefetching, parallel I/O is initiated when the prefetch size is a multiple of the extent size for a table space. Each prefetch request is divided into smaller requests and assigned to different I/O servers.

2. In what situation should you use a redirected restore operation?

A) You want to restore you table spaces into new storage groups.
B) You want to drop a storage group during a restore process.
C) You want to restore your table space containers into a different physical location.
D) You want to move data from one operating system to another.

3. 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) Reload table SALES and use only one partition with a collocated join to the DATE_DIM table using the primary key DATE_ID.
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_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.
D) 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.

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

5. What contributes to the efficient use of block-based buffer pools?

A) The table space extent size is equal to the block size specified for the buffer pool.
B) The table space prefetch size is equal to the block size specified for the buffer pool.
C) The application performs a lot of random I/O operations.
D) The application does not use sequential prefetching.

Solutions: