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IBM C2090-421 Exam Syllabus Topics:

IBM InfoSphere DataStage v8.5 Sample Questions:

Question 1

Input rows to a Transformer contain a product name field and a field with a list of colors the product can be ordered with. The colors are separated by the pipe character (|). Here is an example of an input row: "Shirt"| ....| "Red, Blue, Black"|... For each input row, you want to output multiple output rows, one for each color in the list. For the above example input row, three rows are to be output, one per color: "Shirt" ... "Red", "Shirt" ... "Blue", "Shirt" ... "Black".
Which three operations will you need to accomplish this? (Choose three.)

A. Use the LastRowInGroup() function to determine when the last color in the color list has been processed.
B. Use the SaveInputRecord() to save the input row for processing in the loop. Use the GetInputRecord() to extract the row for each iteration of the loop.
C. Use the Count() function over the ColorList field to determine the number of loop iterations.
D. Use the @ITERATION variable to determine which color in the ColorList field to extract using the Field function.
E. Specify the following loop condition: @ITERATION <= n, where n is a stage variable initialized with number of loop iterations.

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, 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.)
B. 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.
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 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.

Question 3

What are two advantages of using Runtime Column Propagation (RCP)? (Choose two.)

A. Only columns used in the data flow need to be defined.
B. Columns not specifically used in the flow are propagated as if they were.
C. Only columns that are defined as VarChar need RCP enabled.
D. RCP is not a feature of DataStage.
E. Sequential files don't require schema files when using RCP.

Question 4

In which two situations is it appropriate to use a Sparse Lookup? (Choose two.)

A. When invoking a stored procedure within a database per row in the streaming link.
B. When accessing DB2 data using the DB2 API stage.
C. When reference data is significantly larger than the streaming data (100:1).
D. When the output of the Lookup stage needs to be hashed partitioned.

Question 5

The purchase history record contains CustID, ProductID, ProductType and TotalAmount. You need to retain the record of greatest TotalAmount per CustID and ProductType using RemoveDuplicate stage. Which two statements accomplish this requirement? (Choose two.)

A. Hash-partition on ProductType;
Sort on ProductType, CustID and TotalAmount.
B. Hash-partition on CustID and ProductType;
Sort on CustID, ProductType and TotalAmount.
C. Hash-partition on CustID;
Sort on CustID, ProductType and TotalAmount.
D. Hash-partition on CustID, ProductType and TotalAmount;
Sort on CustID, ProductType and TotalAmount.

Solutions: