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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. 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 three techniques will enable you to retrieve the sum of the last group? (Choose three.)

A) Output the sum that you generated each time you process a row for which the LastRow() function returns True.
B) 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.
C) Within each group sort the Flag column in ascending order. Output the sum each time you process the row with a "1" in the Flag column.
D) 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 LastRow() function to determine when the last group is done.
E) Output the sum that you generated up to the previous row each time you process a row with a "1" in the Flag column.

2. Which two steps are required to change from a normal lookup to a sparse lookup in an ODBC Enterprise stage? (Choose two.)

A) Sort the data on the reference link.
B) Replace columns at the beginning of a SELECT statement with a wildcard asterisk (*).
C) Change the lookup option in the stage properties to "Sparse".
D) Establish a relationship between the key field column in the source stage with the database table field.

3. 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 @ITERATION variable to determine which color in the ColorList field to extract using the Field function.
D) Specify the following loop condition: @ITERATION <= n, where n is a stage variable initialized with number of loop iterations.
E) Use the Count() function over the ColorList field to determine the number of loop iterations.

4. How must the input data set be organized for input into the join stage? (Choose two.)

A) Unsorted
B) Entire partitioned
C) Hash partitioned
D) Key partitioned
E) Sorted in ascending order

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

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

Solutions: