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IBM Websphere Datastage V.8.0 Sample Questions:

1. Click the Exhibit button.
In the exhibit, each Job Activity runs a single parallel job. Sequencer1 is configured for All, while Sequencer5 is configured for Any. Assuming that the server hardware has enough system resources to execute all jobs simultaneously, what is the maximum number of jobs that could be running simultaneously?

A) 2
B) 4
C) 5
D) 3

2. A DataStage job uses an Inner Join to combine data from two source parallel data sets that were written to disk in sort order based on the join key columns. Which two methods could be used to dramatically improve performance of this job? (Choose two.)

A) Explicitly specify hash partitioning and sorting on each input to the Join stage.
B) Set the environment variable $APT_SORT_INSERTION_CHECK_ONLY.
C) Unset the Preserve Partitioning flag on the output of each parallel data set.
D) Add a parallel sort stage before each Join input, specifying the "Don't Sort, Previously Grouped" sort key mode for each key.

3. 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.

4. Multiple "resource disk" entries for each node allows for which two events? (Choose two.)

A) Buffers to be written/read in multiple disk locations.
B) File Sets and Data Sets to be written/read in multiple locations.
C) Prevents jobs from aborting if a single resource disk location fills.
D) Additional processes to handle all I/O.

5. Which two statements are correct about XML stages and their usage? (Choose two.)

A) XML Input stage converts XML data to tabular format.
B) XML Transformer stage converts XSLT data to tabular format.
C) XML Output stage can invoke an XSLT style sheet for XML to tabular transformations.
D) XML Output stage converts tabular data to XML hierarchical structure.

Solutions: