IBM InfoSphere DataStage v8.5 : C2090-421

Pass C2090-421 Exam Cram

Exam Code: C2090-421

Exam Name: InfoSphere DataStage v8.5

Updated: Sep 11, 2026

Q & A: 194 Questions and Answers

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IBM C2090-421 Exam Syllabus Topics:
SectionObjectives
Data Transformation and Processing- Aggregation and sorting
  • 1. Sort stage usage
    • 2. Aggregation logic
      - Data cleansing techniques
      • 1. Data type handling
        • 2. Filtering and validation
          Performance Tuning and Optimization- Parallel job optimization
          • 1. Partitioning strategies
            • 2. Memory and CPU tuning
              Job Design and Development- Job types
              • 1. Parallel jobs
                • 2. Server jobs
                  - Stages and links
                  • 1. Transformer stage logic
                    • 2. Lookup stages
                      Job Control and Sequences- Sequence jobs
                      • 1. Control flow design
                        • 2. Triggers and conditions
                          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. Error handling techniques
                                    • 2. Log analysis
                                      IBM InfoSphere DataStage v8.5 Sample Questions:
                                      Question #1

                                      What Information Server tool provides integration with source code control repositories?

                                      • A. Multiple Job Compile
                                      • B. DataStage Designer
                                      • C. Information Services Director
                                      • D. Information Server Manager
                                      Reveal Solution  Discussion  0

                                      Correct Answer: D  🗳️

                                      Question #2

                                      You are responsible for deploying objects into your customers production environment. To ensure the stability of the production system the customer does not permit compilers on production machines. They have also protected the project and only development machines have the required compiler. What two options will allow jobs with a parallel transformer to execute in the customers production machines? (Choose two.)

                                      • A. Create a package with Information Server Manager and select the option to include executables.
                                      • B. Add $APT_COMPILE_OPT=-portable
                                      • C. Set $APT_COPY_TRANSFORM_OPERATOR
                                      • D. Export the jobs with Information Server Manager with the executables.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A,D  🗳️

                                      Question #3

                                      Which statement is true about buffering?

                                      • A. The "buffer" scratch disk pool needs to be defined to allow the framework to perform data buffering.
                                      • B. The framework uses /tmp by default for buffering on Unix systems.
                                      • C. In a clustered environment, using a disk space on an NFS mount for buffering improves performance.
                                      • D. The buffer operator uses both memory and disk storage.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: D  🗳️

                                      Question #4

                                      There is a requirement to load mainframe data with array columns having redefined fields into a flat file. How can the Complex Flat File

                                      • A. Select the Records ID tab on the Stage page. Select a record from the Records list. Select the column(s) with the redefine from the Column list. Within CFF, use the Complex File Load Option window with "Flatten selective arrays" option selected.
                                      • B. CFF does not support flattening for redefined fields.
                                      • C. Within CFF, use the Complex File Load Option window with "Flatten selective arrays" option selected. Select the array with redefine column(s) and click redefine check box option.
                                      • D. Within CFF, use the Complex File Load Option window with "Flatten all arrays" option selected. CFF will handle flattening automatically.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A,C  🗳️

                                      Question #5

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

                                      Correct Answer: A  🗳️

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