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IBM InfoSphere DataStage v8.5 Sample Questions:

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

2. Which three statements are true about stage variables in a Transformer Stage? (Choose three.)

A) Stage variables can be set to NULL.
B) The expression executed for a stage variable can refer to a stage variable which is executed later.
C) Stage variables are refreshed with default values before each new input row is processed.
D) A stage variable in one Transformer can refer to a stage variable in another Transformer, as long as the second Transformer was processed earlier in the job flow.
E) Varchar stage variables can be initialized with spaces.

3. A job needs to split a single Data Set into three Data Sets based on conditions that are supplied at runtime. Which stage would allow you to parameterize the conditions for splitting the input data set?

A) Transformer stage
B) Split Vector stage
C) Switch stage
D) Filter stage

4. There is a requirement to transfer a large file using an FTP Enterprise stage. How can you minimize processing time when a transfer failure occurs?

A) Use a sequencer to check transfer status and restart the job from the beginning on failure.
B) Specify restartable mode on a transfer of the single file.
C) Create multiple readers to transfer file data and specify restartable mode on Input link tab.
D) Manually split the file into multiple files and specify restartable mode on a transfer.

5. What is the correct method to process a file containing multiple record types using a Complex Flat File stage?

A) Define record ID constraints on the Records ID tab of the Complex Flat File stage.
B) Use a Modify stage to convert the output array from the Complex Flat File to a subrecord.
C) Manually break the file into multiple files by record type.
D) Define record definitions on the Constraints tab of the Complex Flat File stage.

Solutions: