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IBM Websphere Datastage V.8.0 Sample Questions:

1. Click the Exhibit button.
A customer is complaining of poor performance from the job shown in the exhibit, which aggregates and joins on ZIP code. Currently all partitioning is set to "Auto" and sort/partition insertion is allowed. What would give the best performance improvement for the job?

A) Hash partition and sort on ZIP code prior to the Copy stage and use entire partitioning on the output of the Aggregator stage.
B) Hash partition and sort on ZIP code prior to the Copy stage, and use same partitioning on the Aggregator and Join stages.
C) Use same partitioning on all input links in the job; create the input data set by hash-partitioning its input on ZIP code.
D) Hash partition and sort on ZIP code on the input links to the Aggregator and Join stages.

2. Click the Exhibit button.
In the exhibit, data is being read from a Sequential File stage (Read_Selling_Group_Mapping) and written to a target Data Set stage (Write_Selling_Group_Mapping_Copy). All columns are being mapped source to target in the Copy stage. After the job is executed using a 2-node configuration file, you notice that the Data Set has only one partition. What are two actions that can be done to this job to ensure Data Set has two partitions? (Choose two.)

A) Enable Runtime Column Propagation (RCP) and set "Force" option in the Copy stage to "TRUE".
B) Disable Runtime Column Propagation (RCP) and set "Force" option in the Copy stage to "TRUE".
C) Enable Runtime Column Propagation (RCP) and set "Force" option in the Copy stage to "FALSE".
D) Disable Runtime Column Propagation (RCP) and set "Force" option in the Data Set stage to "TRUE".

3. Which two statements are accurate regarding usage of database stages? (Choose two.)

A) Native database stages match columns by name.
B) Database stages cannot create tables and must be done externally.
C) Plug-in stages match columns by name.
D) DataStage provides native Oracle database stages.

4. You are assigned to write a job that splits a single Data Set into three Data Sets based on character values on the input record. Normally you would use a transformer link constraint to achieve this but you discover that the condition for each output link is supplied at runtime. Which stage would allow you to parameterize the entire condition for splitting the input data set?

A) Match Frequency
B) Split Vector
C) Filter
D) Modify

5. Click the Exhibit button. Given the requirement to store output in a format suitable for long-term archive storage, what can be done to improve performance of this developed job as shown in the exhibit?

A) Change Execution Mode to Parallel in Sequential File Advanced stage properties.
B) Replace output Sequential File stage with Data Set.
C) Replace output Sequential File stage with External Target.
D) Replace output Sequential File stage with File Set.

Solutions: