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IBM C2090-421 Exam : InfoSphere DataStage v8.5
- Exam Code: C2090-421
- Exam Name: InfoSphere DataStage v8.5
- Updated: Sep 27, 2026
- Q & A: 194 Questions and Answers
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IBM C2090-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Job Execution, Monitoring and Troubleshooting | 15% | - Director client usage - Debugging and validation - Performance optimization - Job logs and error handling |
| Topic 2: Advanced Features and Integration | 10% | - Metadata management - Job sequences and control flow - Source control integration |
| Topic 3: Job Design and Development | 30% | - Sequential and parallel job creation - Stage usage and configuration - Data linking and partitioning - Parameter sets and environment variables |
| Topic 4: DataStage Architecture and Components | 20% | - Client and server components - InfoSphere Information Server architecture - Project and repository management - Parallel framework concepts |
| Topic 5: Data Transformation and Processing | 25% | - Lookup and reference data - Slowly Changing Dimensions (SCD) - Transformer stage logic - Handling NULL values and data types |
IBM InfoSphere DataStage v8.5 Sample Questions:
Question #1
Which two of the following derivations for an output column named OutCol can be used to generate a unique sequence of integers across multiple partitions?
- A. @PARTITIONNUM + @NUMPARTITIONS
- B. 1 + @NUMPARTITIONS * @INROWNUM
- C. @INROWNUM
- D. NextSurrogateKey()
Correct Answer: A 🗳️
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Question #2
Which Information Server client application must be used to manage project-level roles for DataStage?
- A. Web console for IBM Information Server
- B. WebSphere Information Services Director
- C. Director client
- D. Designer client
Correct Answer: A 🗳️
Question #3
A 100MB input dataset has even distribution across 400 unique key values.
When run with a 4-node configuration file, which two changes could improve sort performance in this scenario? (Select two)
- A. Set $APT_TSORT_STRESS_BLOCKSIZE to 50M
- B. Specify "Restrict Memory Usage" to 60MB on the Sort stage properties.
- C. Specify Round Robin partitioning on the input link to the Sort stage.
- D. Convert all numeric fields to varchars.
- E. Alter the Sort stage properties to perform a stable sort.
Correct Answer: A,B 🗳️
Question #4
Which three methods can be used to import metadata from a Web Services Description Language (WSDL) document? (Choose three.)
- A. XML Table Definitions
- B. Orchestrate Schema Definitions
- C. Web Service Function Definitions
- D. Job Stage Column tab properties entered using "Load" feature
- E. Web Services WSDL Definitions
Correct Answer: A,C,E 🗳️
Question #5
In a Transformer expression for a stage variable, there is a nullable input column. What happens when a row is processed that contains NULL in that input column?
- A. NULL is written to the stage variable.
- B. The value written to the stage variable is undetermined.
- C. The row is rejected.
- D. The job aborts.
Correct Answer: A 🗳️
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