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IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. Which two tasks can the Slowly Changing Dimensions (SCD) stage perform? (Choose two.)

A) Look up whether a record with a matching business key value exists in a dimension table. If it does, add new values for selected fields to values lists for those fields.
B) Look up whether a record with a matching business key value exists in a dimension table. If it does not, retrieve a new surrogate key value and insert a new row into the dimension table.
C) Look up whether a record with a matching business key value exists in a fact table. If it does not, retrieve a new surrogate key value and insert a new row into the fact table.
D) Look up whether a record with a matching business key value exists in a dimension table. If it does, mark the record as not-current, and generate a new record with new values for selected fields.

2. When you run a parallel job, any error messages and warnings are written to the job log and can be viewed from the Director client. What two levels of message handlers are there? (Choose two.)

A) project level
B) stage level
C) job level
D) record level

3. You are experiencing performance issues for a given job. You are assigned the task of understanding what is happening at run time for that job. What are the first two steps you should take to understand the job performance issues? (Choose two.)

A) Run job with $APT_TRACE_RUN set to true.
B) Run job with $APT_DUMP_SCORE set to true.
C) Review the objectives of the job.
D) Replace Transformer stages with custom operators.

4. When creating a Wrapper stage, which three tasks need to be done? (Select three)

A) Specify whether input rows are to be processed automatically or manually.
B) Specify the command to be executed by the Wrapper.
C) Code and compile the C/C++ Wrapper source code.
D) Create Table Definitions that define the Wrapper's input and output columns.
E) Specify how Wrapper property values are to be converted.

5. A client has multiple servers connected with a high bandwidth switch and has installed DataStage on one of them. There are five files (with the same record layout) that must be retrieved from three other servers using FTP. Which approach will retrieve and process all five files in the minimal amount of time?

A) In a single job, use three separate FTP Enterprise stages (one for each machine) with output links to a single Sort Funnel stage. Next, process the records without landing to disk.
B) Create a sequence containing five separate DataStage jobs which each retrieve a single file and append it to a common Data Set. Next, process the resulting Data Set in an sixth DataStage job.
C) Use a single FTP Enterprise stage and specify five URI properties (one for each file). Next, process the records without landing to disk.
D) In a single job, use five separate FTP Enterprise stages with output links to a single Sort Funnel stage. Next, process the records without landing to disk.

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