IBM InfoSphere DataStage v8.5 : C2090-421

IBM C2090-421 Actual PDF
  • Exam Code: C2090-421
  • Exam Name: InfoSphere DataStage v8.5
  • Updated: Oct 02, 2026
  • Q & A: 194 Questions and Answers
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IBM C2090-421 Exam Syllabus Topics:

SectionWeightObjectives
Parallel Architecture9%- Parallel execution and configuration files
- Node pools and parallel processing
- Data partitioning and collecting
Persistent Storage10%- Restructure and format stages
- Data sets and file structures
- Sequential files and file sets
Configuration6%- Create and configure projects
- Install and configure InfoSphere DataStage v8.5
- Understand architecture and components
Job Design & Development25%- Job sequences and parameterization
- Transformer and derivation logic
- Slowly Changing Dimensions (SCD)
- Lookup, Join, Merge, and Funnel stages
Advanced Techniques10%- Complex Flat File (CFF) stage
- Job deployment and packaging
- Environment variables and parameter sets
Performance & Troubleshooting15%- Handle errors and rejects
- Partitioning and sorting optimization
- Monitor and log execution
Metadata Management6%- Import and share metadata
- Schema orchestration
- Runtime Column Propagation (RCP)
Database Connectivity9%- Database stage selection
- ODBC, DB2, Oracle integration
- Source and target database properties

IBM InfoSphere DataStage v8.5 Sample Questions:

Question #1

You are responsible for managing job changes for you project team. You must update the source code repository through Eclipse Team source code integration whenever a developer notifies you of an asset change.
What two tasks allow you to update the source code repository with the changed asset? (Select two)

  • A. Right-click the asset and click the Deploy command
  • B. Right-click the asset and click the Build command
  • C. Right-click the asset and click the Team command to commit the artifact to the source control system.
  • D. Right-click the asset and click the Send to Source Control Work Space.
Reveal Solution  Discussion  0

Correct Answer: B,C  🗳️

Question #2

The Change Apply stage produces a change Data Set with a new column representing the code for the type of change. What are three change values identified by these code values? (Choose three.)

  • A. Remove Duplicates
  • B. Copy
  • C. Edit
  • D. Deleted
  • E. Final
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Question #3

Which three actions can improve sort performance in a DataStage job? (Choose three.)

  • A. Run the job sequentially so that only one sort process is invoked.
  • B. Minimize the number of sorts used within a job flow.
  • C. Specify only the key columns which are necessary.
  • D. Adjust the "Restrict Memory Usage" option in the Sort stage.
  • E. Use the stable-sort option to avoid the random ordering of non-key data.
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Question #4

In the job fragment shown in the exhibit, there are two Sort stages: the first (Sort1) sorts the data by state, the second (Sort2) sorts the data by state and area, No repartitioning occurs between the stages.
You have been asked to reduce the number of sorts to improve the performance of the job.

Which two ways might be used to accomplish this without changing how the job functions? (Select two)

  • A. Remove the second Sort stage. Add area as an additional sort key.
  • B. In the second Sort stage change the Sort Mode property of the state column to "Don't sort, previously sorted.".
  • C. In the second Sort stage change the Sort Mode property of the area column to "Don't sort, previously sorted.".
  • D. Remove the first Sort stage. Retain the existing sort keys in the second Sort stage.
Reveal Solution  Discussion  0

Correct Answer: C,D  🗳️

Question #5

You are given a job requirement that requires calculations based on the latest currency exchange rate. You decide to invoke a Web service to obtain the latest exchange rate.
What are two ways that you can perform a Web service invocation in a DataStage job to obtain the latest exchange rate? (Select two)

  • A. Use Web Services Transformer stage.
  • B. Use WISD Input stage.
  • C. Call a Web Service using a DSRoutine inside the Parallel Transformer stage.
  • D. Use Web Services Client stage as a lookup.
Reveal Solution  Discussion  0

Correct Answer: A,D  🗳️

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