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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

Question #1

In the exhibit, the Aggregator stage aggregates over CustomerID. The Join stage joins by CustomerID. When the score is created, DataStage will insert hash partitioners and tsort operators to ensure the correct results.

Which two choices will eliminate sort operators from being inserted at run-time? (Select two)

A. Add Sort stages in front of the Join stage and specify the Same partitioner for the links going into the Join. Set the $APT_NO_SORT_INSERTION environment variable to "True".
B. Add a Sort stage before the Aggregator stage and specify the Same partitioner for the link going into the Aggregator Set the $APT_SORTJNSERTION_CHECK_ONLY environment variable to "True".
C. Add a Sort stage before the Copy stage and specify Same partitioners for the links going into the Aggregator and Join stages.
D. Add a Sort stage before the Copy stage and specify Auto partitioned for the links going into the Aggregator and Join stages.

Question #2

Which condition is required to use the LastRowInGroup() function to determine a key break on a field?

A. The input data has to be sorted by the key field and DataStage must be able to detect that the data is sorted, for example, by the presence of a Sort stage.
B. The LastRowInGroup() function does not require the data to be either sorted or grouped by the key field. If necessary the LastRowInGroup() function will perform a sort.
C. The LastRowInGroup() function requires the data to be grouped by the key field, but the data does not have to be sorted.
D. The input data has to be sorted by the key field, but it is not required that DataStage be able to detect this. For example, the input data might be sorted before it is input to the job. (However, the job will abort at runtime if the data isn't sorted.)

Question #3

You are assigned to correct a job from another developer. The job contains 20 stages sourcing data from two Data Sets and many sequential files. The annotation in the job indicates who wrote the job and when, not the objective of the job. All link and stage names use the default names. One of the output columns has an incorrect value which should have been obtained using a lookup. What could the original developer have done to make this task easier for maintenance purposes?

A. Named all stages and links based on what they do.
B. Indicated all stage names within the job annotation.
C. Named all stage and links the same.
D. Named all stage and links with column names and ideas.

Question #4

You are responsible for deploying objects into your customers production environment. To ensure the stability of the production system the customer does not permit compilers on production machines. They have also protected the project and only development machines have the required compiler. What two options will allow jobs with a parallel transformer to execute in the customers production machines? (Choose two.)

A. Set $APT_COPY_TRANSFORM_OPERATOR
B. Add $APT_COMPILE_OPT=-portable
C. Export the jobs with Information Server Manager with the executables.
D. Create a package with Information Server Manager and select the option to include executables.

Question #5

What are the three features of Information Server that allow you to deploy DataStage objects? (Select three)

A. Designer Client Export
B. dscc.exe
C. $APT_COPY_TRANSFORMER
D. istool
E. Information Server Manager

Solutions: