IBM C2090-421 Exam : InfoSphere DataStage v8.5

IBM C2090-421 exam
  • Exam Code: C2090-421
  • Exam Name: InfoSphere DataStage v8.5
  • Updated: Sep 14, 2026
  • Q & A: 194 Questions and Answers
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IBM C2090-421 Exam Syllabus Topics:

SectionObjectives
Monitoring and Administration- Job control and troubleshooting
  • 1. Job monitoring and debugging tools
    • 2. Logging and error handling
      Data Connectivity and Integration- Source and target systems
      • 1. Database connectivity (ODBC/JDBC)
        • 2. Sequential and file-based data processing
          DataStage Architecture and Fundamentals- Core architecture concepts
          • 1. Project environment and repository structure
            • 2. Parallel processing architecture overview
              Performance and Optimization- Parallel execution tuning
              • 1. Partitioning strategies
                • 2. Performance optimization techniques
                  Job Design and Development- Building DataStage jobs
                  • 1. Transformer and stage configuration
                    • 2. Server and parallel job design principles

                      IBM InfoSphere DataStage v8.5 Sample Questions:

                      Question #1

                      What stage allows for more than one reject link?

                      • A. Merge stage
                      • B. Peek stage
                      • C. Funnel stage
                      • D. Lookup stage
                      • E. Join stage
                      Reveal Solution  Discussion  0

                      Correct Answer: A  🗳️

                      Question #2

                      A job reads from a sequential file using a SequentialFile stage with option "number of readers" set to 2. This data goes to a Transformer stage and then is written to a dataset using the DataSet stage. The default configuration file has three nodes. The environment variable $APT_DISABLE_COMBINATION is set to "True" and partitioning is set to "Auto". How many processes will be created?

                      • A. 12
                      • B. 9
                      • C. 5
                      • D. 7
                      Reveal Solution  Discussion  0

                      Correct Answer: B  🗳️

                      Question #3

                      To better understand the data flowing through a job, it is desirable to have structural information about the datasets captured in the job log. Which environment variable can provide this information?

                      • A. $APT_NO_PART_INSERTION
                      • B. $OSH_PRINT_SCHEMAS
                      • C. $APT_PM_PLAYER_MEMORY
                      • D. $OSH_STDOUT_MSG
                      Reveal Solution  Discussion  0

                      Correct Answer: B  🗳️

                      Question #4

                      Which three statements are true about stage variables in a Transformer Stage? (Choose three.)

                      • A. The expression executed for a stage variable can refer to a stage variable which is executed later.
                      • B. Stage variables can be set to NULL.
                      • C. A stage variable in one Transformer can refer to a stage variable in another Transformer, as long as the second Transformer was processed earlier in the job flow.
                      • D. Varchar stage variables can be initialized with spaces.
                      • E. Stage variables are refreshed with default values before each new input row is processed.
                      Reveal Solution  Discussion  0

                      Correct Answer: A,B,D  🗳️

                      Question #5

                      You are using the Change Capture stage in your job design to identify changes made to the input link (before image) to obtain the results in the output link. This job will be using a multi-node configuration file when executed. By default, the Change Capture stage produces an output change link with which two characteristics? (Choose two.)

                      • A. Table Definition based on the keys of the input link
                      • B. Table Definition based on the after input link
                      • C. added column named Change_Code
                      • D. added column named Difference_Value
                      Reveal Solution  Discussion  0

                      Correct Answer: B,C  🗳️

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