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IBM Assessment: InfoSphere DataStage v8.5 : A2090-421

A2090-421 Exam Simulator
  • Exam Code: A2090-421
  • Exam Name: Assessment: InfoSphere DataStage v8.5
  • Updated: Oct 03, 2026
  • Q & A: 194 Questions and Answers

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IBM A2090-421 exam simulator

IBM A2090-421 Exam Syllabus Topics:

SectionObjectives
Topic 1: Job Design and Development- Job types
  • 1. Server jobs
    • 2. Parallel jobs
      - Stages and links
      • 1. Lookup stages
        • 2. Transformer stage logic
          Topic 2: Job Control and Sequences- Sequence jobs
          • 1. Triggers and conditions
            • 2. Control flow design
              Topic 3: Data Transformation and Processing- Data cleansing techniques
              • 1. Filtering and validation
                • 2. Data type handling
                  - Aggregation and sorting
                  • 1. Sort stage usage
                    • 2. Aggregation logic
                      Topic 4: Debugging and Troubleshooting- Job monitoring
                      • 1. Error handling techniques
                        • 2. Log analysis
                          Topic 5: InfoSphere DataStage Architecture- Parallel processing architecture
                          • 1. Nodes and partitions
                            • 2. Runtime architecture components
                              - DataStage project structure
                              • 1. Projects and environments
                                • 2. Repository metadata concepts
                                  Topic 6: Performance Tuning and Optimization- Parallel job optimization
                                  • 1. Memory and CPU tuning
                                    • 2. Partitioning strategies

                                      IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

                                      Question #1

                                      Which two job design techniques can be used to provide unique names to sequential output files that are used in multi-instance jobs? (Select two)

                                      • A. Use the file name(s) from values contained in the data stream.
                                      • B. Create the file name(s) from values contained in a value file.
                                      • C. Use parameters to identify file names.
                                      • D. Prepend/append the Invocation ID to the file name.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: C,D  🗳️

                                      Question #2

                                      Which two statements are true about DataStage parallel routines? (Choose two.)

                                      • A. Parallel routines created as shared library functions are not supported.
                                      • B. Parallel routines can be written that are called before or after a stage runs.
                                      • C. Parallel routines can be written that are called from within the Transformer stage.
                                      • D. Parallel routines are written in DataStage Basic.
                                      • E. Parallel routines are coded within a DataStage Designer editor.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B,C  🗳️

                                      Explanation: Only visible for ITExamSimulator members. You can sign-up / login (it's free).

                                      Question #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 Count() function over the ColorList field to determine the number of loop iterations.
                                      • 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. Specify the following loop condition: @ITERATION <= n, where n is a stage variable initialized with number of loop iterations.
                                      • D. Use the LastRowInGroup() function to determine when the last color in the color list has been processed.
                                      • E. Use the @ITERATION variable to determine which color in the ColorList field to extract using the Field function.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A,C,E  🗳️

                                      Question #4

                                      Which option is required to identify a particular job player processes?Which option is required to identify a particular job? player processes?

                                      • A. Log onto the server and issue the command "ps -ef | grep ds".
                                      • B. Use the DataStage Director Job administration screen to display active player processes.
                                      • C. Set $APT_DUMP_SCORE to true.
                                      • D. Set $APT_PM_SHOW_PIDS to true.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: D  🗳️

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

                                      • A. 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.
                                      • 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. 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 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 each time you process a row for which the LastRow() function returns True.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A,B,D  🗳️

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