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IBM InfoSphere DataStage v8.5 Sample Questions:

1. Which of the following describes what happens when Runtime Column Propagation is enabled?

A) An input column value flows into a target column only if it matches it by name.
B) An input column value flows into a target column based on its position in a Schema file.
C) An input column value flows into a target column only if it is explicitly mapped to it.
D) An input column value flows into a target column based on its position in the input row. For example, first column in the input row goes into the first target column.

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

3. You are responsible for managing job changes for you project team. You must update the source code repository through Eclipse Team source code integration whenever a developer notifies you of an asset change.
What two tasks allow you to update the source code repository with the changed asset? (Select two)

A) Right-click the asset and click the Team command to commit the artifact to the source control system.
B) Right-click the asset and click the Deploy command
C) Right-click the asset and click the Build command
D) Right-click the asset and click the Send to Source Control Work Space.

4. A job design consists of an input sequential file, a Modify stage, followed by a Filter stage and an output SequentialFile stage. The job is run on an SMP machine with a configuration file defined with three nodes. No environment variables were set for the job. How many osh processes will this job create?

A) 9
B) 16
C) 8
D) 11

5. In a Transformer Stage you have a nullable input column that is mapped to a non-nullable output column. What two techniques can be used to handle NULL values? (Choose two.)

A) IF input_column = NULL THEN 'unknown' ELSE input_column.
B) IF input_column = '' THEN 'unknown' ELSE input_column.
C) NullToValue(input_column, 'unknown').
D) IF IsNULL(input_column) THEN 'unknown' ELSE input_column.

Solutions: