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IBM InfoSphere DataStage v9.1 Sample Questions:

1. Which derivations are executed first in the Transformer stage?

A) Loop variable derivations
B) Input column derivations
C) Stage variable derivations
D) Output column derivations

2. A DataStage job uses an Inner Join to combine data from two source parallel datasets 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) Disable job monitoring.
B) Explicitly specify hash partitioning and sorting on each input to the Join stage.
C) Set the environment variable $APT_SORT_INSERTION_CHECK_ONLY.
D) Add a parallel sort stage before each Join input, specifying the "Don't Sort, Previously Grouped" sort key mode for each key.
E) Unset the Preserve Partitioning flag on the output of each parallel dataset.

3. Which statement is true about creating DataStage projects?

A) DataStage projects cannot be created during DataStage installation.
B) After installation DataStage projects can be created in DataStage Administrator.
C) After installation only DataStage developers can create DataStage projects.
D) After installation DataStage projects can be created in the Information Server Web Console.

4. You are using the Change Capture stage in your job design to identify changes made to the input link (before image) to obtain the results in the output link. This job will be using a multi-node configuration file when executed. What are two requirements on the input link data for the Change Capture stage? (Choose two.)

A) key partitioned
B) sorted
C) parallel mode
D) merged links
E) sequential mode

5. You have a parallel job that based on operational recoverability requirements needs to be broken up into two separate parallel jobs. You have decided to use the Data Set stage to support this job design change. What two characteristics of Data Sets make them a good design consideration in your jobs design change? (Choose two.)

A) They sort the data in a staging area.
B) They use the same data types as the parallel framework.
C) They automatically convert data types.
D) They persist the parallelism of the job creating them.
E) They persist parallelism into a temporary repository table.

Solutions: