IBM InfoSphere DataStage v8.5 : C2090-421

  • Exam Code: C2090-421
  • Exam Name: InfoSphere DataStage v8.5
  • Updated: Sep 27, 2026
  • Q&As: 194 Questions and Answers

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IBM C2090-421 Exam Syllabus Topics:

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

                                      IBM InfoSphere DataStage v8.5 Sample Questions:

                                      Question #1

                                      How does the Complex Flat File stage (CFF) support the use of "OCCURS DEPENDING ON" clause?

                                      • A. The related elements are output as denormalized fields.
                                      • B. The related elements are output as arrays.
                                      • C. CFF does not support this clause.
                                      • D. The related elements are output as subrecords.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B  🗳️

                                      Question #2

                                      Which three statements are true about File Sets? (Choose three.)

                                      • A. File sets are partitioned.
                                      • B. File sets are readable by external applications.
                                      • C. File sets always execute in parallel.
                                      • D. File sets are stored as header file and data files.
                                      • E. File sets have a proprietary data format which may change in future DataStage versions.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A,B,D  🗳️

                                      Question #3

                                      In the exhibit, a Funnel stage has two input links. Input 1 (Seq_File) comes from a SequentialFile with "Readers per Node" set to "2". Input 2 (Dataset) comes from a dataset created with 3 partitions. With the Funnel stage, the funnel type is set to "Sequence". The parallel configuration file contains three nodes.

                                      How many instances of the Funnel stage run in parallel?

                                      • A. 2
                                      • B. 1
                                      • C. 6
                                      • D. 3
                                      Reveal Solution  Discussion  0

                                      Correct Answer: D  🗳️

                                      Question #4

                                      Which three environment variables are used for reporting on DataStage jobs? (Select three)

                                      • A. $APT_PM_STARTUP_CONCURRENCY
                                      • B. $APT_PM_PLAYER_MEMORY
                                      • C. $APT_DISABLE_ROOT_FORKJOIN
                                      • D. $APT_DUMP_SCORE
                                      • E. $OSH_PRINT_SCHEMAS
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B,D,E  🗳️

                                      Question #5

                                      You are connected to a domain and must configure it for Source Code Integration.
                                      What are the two things that must be done to associate your DataStage repository with a source control system? (Select two)

                                      • A. From Information Server Manager choose Team Share Project.
                                      • B. Create a source code control project with the same name as the domain. Choose Integrate Source Control.
                                      • C. From Information Server Manager choose Team Import.
                                      • D. From Designer Client choose Team Share Project.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B,C  🗳️

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