IBM A2090-421 real exam prep : Assessment: InfoSphere DataStage v8.5

  • Exam Code: A2090-421
  • Exam Name: Assessment: InfoSphere DataStage v8.5
  • Updated: Sep 09, 2026
  • Q&As: 194 Questions and Answers

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IBM A2090-421 Exam Syllabus Topics:

SectionObjectives
Data Transformation and ETL Logic- Data mapping and transformation rules
  • 1. Data type handling
    • 2. Column derivations and expressions
      DataStage Architecture- InfoSphere DataStage components
      • 1. Designer, Director, and Administrator clients
        • 2. Parallel vs Server edition concepts
          Job Design and Development- Job types
          • 1. Parallel jobs
            • 2. Sequence jobs
              • 3. Server jobs
                - Stages and links
                • 1. Transformer stage usage
                  • 2. Lookup and join operations
                    Performance and Parallelism- Parallel processing concepts
                    • 1. Buffering and tuning techniques
                      • 2. Partitioning methods
                        Job Execution and Troubleshooting- Monitoring and debugging
                        • 1. Common job failure causes
                          • 2. Director log analysis

                            IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

                            Question #1

                            Using a DB2 for z/OS source database, a 200 million row source table with 30 million distinct values must be aggregated to calculate the average value of two column attributes. What would provide optimal performance while satisfying the business requirements?

                            • A. Select all source rows using a DB2 Enterprise stage, use a parallel Sort stage with the specified sort keys, calculate the average values using a parallel Transformer with stage variables and output link constraints.
                            • B. Select all source rows using a DB2 API stage. Aggregate using a Sort Aggregator.
                            • C. Using custom SQL with an ORDER BY clause based on key columns, select all source rows using the DB2 API stage. Aggregate using a Hash Aggregator.
                            • D. Using custom SQL with AVG functions and a DISTINCT clause, select all source rows using a DB2 Enterprise stage.
                            Reveal Solution  Discussion  0

                            Correct Answer: B  🗳️

                            Question #2

                            In a file defining a partial schema, which three properties define the record? (Choose three.)

                            • A. record_length
                            • B. record_delim_string
                            • C. text
                            • D. delim
                            • E. intact
                            Reveal Solution  Discussion  0

                            Correct Answer: A,B,E  🗳️

                            Question #3

                            A job needs to split a single Data Set into three Data Sets based on conditions that are supplied at runtime. Which stage would allow you to parameterize the conditions for splitting the input data set?

                            • A. Filter stage
                            • B. Transformer stage
                            • C. Split Vector stage
                            • D. Switch stage
                            Reveal Solution  Discussion  0

                            Correct Answer: A  🗳️

                            Question #4

                            What two stages are required to place Header and Detail records, which have different formats, into a single format? (Choose two.)

                            • A. Combine Stage
                            • B. Funnel Stage
                            • C. Column Export Stage
                            • D. Column Import Stage
                            Reveal Solution  Discussion  0

                            Correct Answer: B,C  🗳️

                            Question #5

                            Click the Exhibit button.

                            These three Sequential Files shown in the exhibit need to be joined. Join_1 is on Columns CustID and OrderID. Join_2 is on CustID and LocationID. What is the most efficient hash partitioning strategy for each link?

                            • A. For LinkA Hash Partition on CustID, OrderID and LocationID; For LinkB Hash Partition on CustID, OrderID and LocationID; For LinkC Hash Partition on CustID, OrderID and LocationID; For LinkD Hash Partition on CustID, OrderID and LocationI
                            • B. For LinkA Hash Partition on CustID and OrderID; For LinkB Hash Partition on CustID and OrderID; For LinkC Hash Partition on CustID and LocationID; For LinkD Hash Partition on CustID and LocationID.
                            • C. For LinkA Hash Partition on OrderID and CustID; For LinkB Hash Partition on OrderID and CustID; For LinkC Hash Partition on LocationID and CustID; For LinkD Hash Partition on LocationID and CustID.
                            • D. For LinkA Hash Partition on CustID;
                              For LinkB Hash Partition on CustID;
                              For LinkC Same Partition;
                              For LinkD Hash Partition on CustID.
                            Reveal Solution  Discussion  0

                            Correct Answer: D  🗳️

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