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IBM InfoSphere DataStage v8.5 Sample Questions:

1. In the job fragment shown in the exhibit, the data going into the target Sequential File stage needs to be sorted by postal code. The Sort stage accomplishes this by running in Sequential mode and sorting by postal code. You have been asked to improve the performance of the job with a 4-node configuration file.

Which two changes will improve the performance of the job? (Choose two.)

A) Add a second Sort stage just before the existing Sort stage; run the new stage in parallel mode sorting by postal code.
B) Eliminate the existing Sort stage; define an in-stage sort in the Filter stage, sorting by postal code. In the target Sequential File stage choose the SortMerge collector.
C) Move the Sort stage in front of the Filter stage, so that the sort is performed earlier in the job.
D) Change the mode of the existing Sort stage to parallel mode; continue to sort by postal code. In the target Sequential File stage choose the SortMerge collector.

2. DataStage offers database connectivity through connectors, native parallel and plug-in stage types. Which two statements are correct? (Choose two.)

A) ODBC API is a plug-in stage.
B) Next to the connector stage it is best to use the native parallel database stages.
C) The connector stage offers better functionality and performance and is the best to use.
D) For maximum parallel performance, scalability, and features it is best to use the native parallel database stages.

3. You have been given operational requirements to introduce data recovery to one of your parallel job designs. Additionally, you have been told that you are to use flat files as your intermediate data structure. Which two tasks will accomplish these objectives? (Choose two.)

A) Use the Hash File stage to write and read data between parallel jobs.
B) Use the Sequential stage to export and import data between jobs.
C) Enable checkpoint restartability in each of your parallel stages.
D) Break up the design by splitting it into at least two parallel jobs.

4. Which two of the following derivations for an output column named OutCol can be used to generate a unique sequence of integers across multiple partitions?

A) NextSurrogateKey()
B) @INROWNUM
C) @PARTITIONNUM + @NUMPARTITIONS
D) 1 + @NUMPARTITIONS * @INROWNUM

5. You found there were common functional requirements in the data mapping specification. The required functions are same but the record formats are different. Which action will allow you to effectively implement common logic?

A) Create separate jobs and choose appropriate job within a job sequence.
B) Create parallel routines.
C) Create parallel shared containers and define columns combining all data formats.
D) Create parallel shared containers with Runtime Column Propagation (RCP) ON and define only necessary columns needed for the logic.

Solutions: