IBM C2090-421 : InfoSphere DataStage v8.5

  • Exam Code: C2090-421
  • Exam Name: InfoSphere DataStage v8.5
  • Updated: Oct 02, 2026   Q&As: 194 Questions and Answers

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IBM C2090-421 Exam Syllabus Topics:
SectionObjectives
Topic 1: Performance Optimization- Job tuning and bottleneck analysis
- Parallel processing optimization
Topic 2: Data Integration- Connectivity to data sources and targets
- Data transformation techniques
Topic 3: Administration and Troubleshooting- Error handling and recovery
- Job monitoring and logging
Topic 4: Job Development- Job sequences and control logic
- Parallel job design principles
- Stages and transformers usage
Topic 5: InfoSphere DataStage Architecture- Server and Parallel Job Architecture
- Components (Designer, Director, Administrator)
IBM InfoSphere DataStage v8.5 Sample Questions:
Question #1

Which two statements are true about the usage of scratch disk? (Choose two.)

  • A. The Sort stage always uses the scratch disk.
  • B. You can define multiple scratch disk spaces to distribute disk I/O.
  • C. If "buffer" scratch disk pool is defined, the framework uses this disk pool and the default disk pool.
  • D. The parallel framework uses the disk space specified in the scratch disk setting to buffer virtual data set records.
Reveal Solution  Discussion  0

Correct Answer: B,D  🗳️

Question #2

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;
    For LinkB Hash Partition on CustID;
    For LinkC Same Partition;
    For LinkD Hash Partition on CustID.
  • B. 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.
  • C. 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
  • D. 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.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #3

Your job sequence must be restartable. It runs Job1, Job2, and Job3 serially. It has been compiled with "Add checkpoints so sequence is restartable". Job1 must execute every run even after a failure. Which two properties must be selected to ensure that Job1 is run each time, even after a failure? (Choose two.)

  • A. Use the Nested Condition Activity with a trigger leading to Job1; set the trigger expression type to "Unconditional".
  • B. Set trigger on the Job1 Activity stage to "Unconditional".
  • C. In the Job1 Activity stage set the Execution action to "Reset if required, then run.".
  • D. Set the Job1 Activity stage to "Do not checkpoint run.".
Reveal Solution  Discussion  0

Correct Answer: C,D  🗳️

Question #4

Which two statements are true about the use of named node pools? (Choose two.)

  • A. Using appropriately named node pools forces DataStage to use named pipes between stages.
  • B. Named node pools can allow separation of buffering from sorting disks.
  • C. Clustered environments must have named node pools for data processing.
  • D. Named node pools constraints will limit stages to be executed only on the nodes defined in the node pools.
Reveal Solution  Discussion  0

Correct Answer: B,D  🗳️

Question #5

How must the input data set be organized for input into the join stage? (Choose two.)

  • A. Entire partitioned
  • B. Key partitioned
  • C. Unsorted
  • D. Hash partitioned
  • E. Sorted in ascending order
Reveal Solution  Discussion  0

Correct Answer: B,E  🗳️

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