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

  • Exam Code: A2090-421
  • Exam Name: Assessment: InfoSphere DataStage v8.5
  • Updated: Sep 28, 2026
  • Q & A: 194 Questions and Answers

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IBM A2090-421 Exam Syllabus Topics:

SectionObjectives
Job Design and Development- Stages and links
  • 1. Transformer stage logic
    • 2. Lookup stages
      - Job types
      • 1. Parallel jobs
        • 2. Server jobs
          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
                  Debugging and Troubleshooting- Job monitoring
                  • 1. Log analysis
                    • 2. Error handling techniques
                      Performance Tuning and Optimization- Parallel job optimization
                      • 1. Partitioning strategies
                        • 2. Memory and CPU tuning
                          Job Control and Sequences- Sequence jobs
                          • 1. Control flow design
                            • 2. Triggers and conditions
                              Data Transformation and Processing- Aggregation and sorting
                              • 1. Sort stage usage
                                • 2. Aggregation logic
                                  - Data cleansing techniques
                                  • 1. Filtering and validation
                                    • 2. Data type handling

                                      IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

                                      Question #1

                                      How are Shared Table definitions created from the DataStage Client?

                                      • A. This cannot be done from the DataStage Client
                                      • B. Using the "Shared Table Creation Wizard" from the DataStage Client.
                                      • C. Using the "Save" button on the "Table Properties" panel
                                      • D. No need to, DataStage table definitions are automatically saved as shared metadata.
                                      • E. Using the "Save" button on the columns tab on the Stage/Link editor
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B  🗳️

                                      Question #2

                                      What is the lowest CPU cost partitioning method?

                                      • A. Round Robin
                                      • B. Random
                                      • C. Entire
                                      • D. Hash
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A  🗳️

                                      Question #3

                                      Which three attributes are found for each segment in a Data Set descriptor file? (Select three)

                                      • A. Flag marking segment as valid or invalid.
                                      • B. Path names of all data files on all processing nodes.
                                      • C. Schema of Data Set.
                                      • D. Copy of the configuration file used when segment was created.
                                      • E. Statistical information such as number of records in the segment and number of bytes.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B,D,E  🗳️

                                      Question #4

                                      You have a dataset hash-partitioned and sorted on CustID. You need to create a Sequential File sorted on CustID from this dataset. Which technique is the most appropriate?

                                      • A. Use SortMerge collector for the Sequential File input link.
                                      • B. Insert Sort stage before the final Sequential File stage and use Round Robin collector for the Sequential File stage input link.
                                      • C. Use Copy stage.
                                      • D. Insert Sort stage before the final Sequential File stage and use Ordered collector for the Sequential File stage input link.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A  🗳️

                                      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 CustID, ProductType and TotalAmount;
                                        Sort on CustID, ProductType and TotalAmount.
                                      • B. Hash-partition on ProductType;
                                        Sort on ProductType, CustID and TotalAmount.
                                      • C. Hash-partition on CustID and ProductType;
                                        Sort on CustID, ProductType and TotalAmount.
                                      • D. Hash-partition on CustID;
                                        Sort on CustID, ProductType and TotalAmount.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: C,D  🗳️

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