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IBM Assessment: IBM InfoSphere DataStage v9.1 Assessment Sample Questions:

1. In your ETL application design you have found several areas of common processing requirements in the mapping specifications. These common logic areas found include: code validation lookups and name formatting. The common logic areas have the same logic, but the jobs using them would have different column metadata. Choose the action that gives you the best reusability design to effectively implement these common logic areas in your ETL application?

A) Create parallel shared containers with Runtime Column Propagation (RCP) ON and define only necessary common columns needed for the logic.
B) Create separate jobs for each layout and choose the appropriate job to run within a job sequencer.
C) Create parallel routines for each of the common logic areas and for each of the unique column metadata formats.
D) Create parallel shared containers and define columns combining all data formats.

2. Which derivations are executed last in the Transformer stage?

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

3. What stage allows for more than one reject link?

A) Funnel stage
B) Lookup stage
C) Join stage
D) Merge stage

4. A job design reads from a complex flat file, performs some transformations on the data, and outputs the results to a ISD output stage. How can the parameter values can be passed to this job at run-time?

A) Execute a DSSetParam with the values at job execution time.
B) Pass the parameter values at the time of the service request.
C) Change the properties of the information provider.
D) Include the parameter values in the data.

5. You are processing groups of rows in a Transformer. The first row in each group contains "1" in the Flag column and "0" in the remaining rows of the group. At the end of each group you want to sum and output the QTY column values. Which technique will enable you to retrieve the sum of the last group?

A) Output the sum that you generated up to the previous row each time you process a row with a
"1" in the Flag column. Use the FirstRow()
function to determine when the group is done.
B) Output the sum that you generated each time you process a row for which the LastRow()
function returns True.
C) Output the sum that you generated up to the previous row each time you process a row with a
"1" in the Flag column.
D) Output a running total for each group for each row. Follow the Transformer stage by an
Aggregator stage. Take the MAX of the QTY column
for each group.

Solutions: