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

1. Given the following CREATE TABLE statement:

Which statement is correct?

A) A range-partitioned table is created and values outside the range of 1 to 1000000 can be stored in the STUDENT_ID column.
B) A range-clustered table is created and only values from 1 to 1000000 can be stored in the STUDENT_ID column.
C) A range-partitioned table is created and only values from 1 to 1000000 can be stored in the STUDENT_ID column.
D) A range-clustered table is created and values outside the range of 1 to 1000000 can be stored in the STUDENT_ID column.

2. A DBA wants to create a table named SALES that has the following characteristics: ?effective data clustering and management of space utilization ?rows in the table should be clustered based on when they are added to the table Which clause must be used with the CREATE TABLE statement to define this table?

A) ORGANIZE BY INSERT TIME
B) ORGANIZE BY KEY SEQUENCE
C) ORGANIZE BY TIME PERIOD
D) ORGANIZE BY DIMENSIONS

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 DATE_DIM and use only one partition with a collocated join to the SALES table using the primary key DATE_ID.
B) 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.
C) Reload table SALES and use only one partition with a collocated join to the DATE_DIM table using the primary key DATE_ID.
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. If a large amount of sequential prefetching is occurring, what can be done to improve efficiency?

A) Create indexes that encourage the optimizer to use index-only access.
B) Set SEQDETECT to NO.
C) Allocate a block-based area in the appropriate buffer pool.
D) Set NUMBLOCKPAGES to 0 in all buffer pools.

5. Which is NOT a valid method for prefetching data?

A) Read-ahead prefetching
B) Smart data prefetching
C) Consecutive prefetching
D) Sequential detection prefetching

Solutions: