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

1. Which statement about SMS table spaces is correct?

A) SMS table spaces are recommended when you have small tables that are not likely to grow quickly.
B) Tables, large objects (LOBs), and indexes can each reside in separate SMS table spaces.
C) The system catalog cannot be stored in an SMS table space.
D) Extents are more likely to be contiguous with SMS table spaces than they are with DMS table spaces.

2. If the AUDIT_BUF_SZ configuration parameter is set to zero (0), what will happen?

A) Statements generating audit records must wait for the records to be written to disk before they can complete execution.
B) There is no limit to how many audit records can be stored in an internal memory buffer for one single statement generating audit records.
C) The audit facility writes records to disk at the same time the statements generating the audit records are executing.
D) The writing of audit records to disk will be delayed until a minimum number of records (based on record size and memory available in the database heap) have been generated.

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

4. Consider the following statement:

Which indexes should be created for optimal query performance?

A) CREATE INDEX emp_idx ON employee (workdept, lastname, job); CREATE INDEX dept_idx ON department (deptname, deptno);
B) CREATE INDEX emp_idx ON employee (workdept); CREATE INDEX dept_idx ON department (deptno);
C) CREATE INDEX emp_idx ON employee (workdept) CLUSTER; CREATE INDEX dept_idx ON department (deptname, deptno);
D) CREATE INDEX emp_idx ON employee (lastname, job, workdept) CLUSTER; CREATE INDEX dept_idx ON department (deptname);

5. The following query is executed frequently against the SALES table: SELECT sales_person, region FROM sales WHERE region = 'Quebec' Which statement will create an index for optimal query performance?

A) CREATE INDEX sales_idx ON sales (region, sales_person)
B) CREATE INDEX sales_idx ON sales (sales_person)
C) CREATE INDEX sales_idx ON sales (region)
D) CREATE INDEX sales_idx ON sales (region) INCLUDE (sales_person)

Solutions: