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

1. The following query is executed frequently against the EMPLOYEE table: SELECT empid, salary, bonus FROM employee ORDER BY bonus, salary; Which statement will create an index for optimal query performance?

A) CREATE INDEX bonus_salary_idx ON employee (bonus, salary) CLUSTER
B) CREATE INDEX salary_bonus_idx ON employee (salary, bonus) CLUSTER
C) CREATE INDEX salary_bonus_idx ON employee (salary, bonus)
D) CREATE INDEX bonus_salary_idx ON employee (bonus, salary)

2. In which scenario should a DBA consider creating a multidimensional clustering (MDC) table instead of a regular base table?

A) To improve access performance for tables in an OLTP database.
B) To improve query performance in a data warehouse environment.
C) To improve insert/delete performance for tables in an OLTP database.
D) To improve index performance in a data warehouse environment.

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. Which statement about Insert-Time-Clustered (ITC) is correct?

A) Block indexes cannot be created for ITC tables.
B) Views cannot be created on ITC tables.
C) ITC tables can release their empty pages to the operating system.
D) ITC tables do not support row compression.

5. Which statement about Q Replication is correct?

A) It uses HADR message queues to transmit transactions between source and target databases.
B) It uses WebSphere MQ message queues to transmit transactions between source and target databases.
C) It uses continuous log shipping to replicate from the source database to the target database.
D) It uses replication control tables and changed data tables to replicate from the source database to the target database.

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