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IBM C2090-421 : InfoSphere DataStage v8.5
Exam Code: C2090-421
Exam Name: InfoSphere DataStage v8.5
Updated: Sep 09, 2026
Q & A: 194 Questions and Answers
C2090-421 Free Demo download
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IBM C2090-421 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Performance Optimization | - Parallel processing optimization - Job tuning and bottleneck analysis |
| Topic 2: InfoSphere DataStage Architecture | - Server and Parallel Job Architecture - Components (Designer, Director, Administrator) |
| Topic 3: Job Development | - Parallel job design principles - Job sequences and control logic - Stages and transformers usage |
| Topic 4: Administration and Troubleshooting | - Job monitoring and logging - Error handling and recovery |
| Topic 5: Data Integration | - Data transformation techniques - Connectivity to data sources and targets |
IBM InfoSphere DataStage v8.5 Sample Questions:
Question #1
Which three statements are true about stage variables in a Transformer Stage? (Choose three.)
- A. Stage variables can be set to NULL.
- B. Stage variables are refreshed with default values before each new input row is processed.
- C. The expression executed for a stage variable can refer to a stage variable which is executed later.
- D. Varchar stage variables can be initialized with spaces.
- E. 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.
Answer: A,C,D
Question #2
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 constraints will limit stages to be executed only on the nodes defined in the node pools.
- C. Named node pools can allow separation of buffering from sorting disks.
- D. Clustered environments must have named node pools for data processing.
Answer: B,C
Question #3
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. @INROWNUM
- B. @PARTITIONNUM + @NUMPARTITIONS
- C. 1 + @NUMPARTITIONS * @INROWNUM
- D. NextSurrogateKey()
Answer: B
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Question #4
A customer must compare a date column with a job parameter date to determine which output links the row belongs on. What stage should be used for this requirement?
- A. Compare stage
- B. Filter stage
- C. Transformer stage
- D. Switch stage
Answer: C
Question #5
Click the Exhibit button.
The job in the exhibit runs to successful completion with no warnings. However, a validation test identifies that the CUSTOMER_MASTER table is empty. You suspect the cause to be related to the NEW_CUSTOMERS table or a defect in the job. Examining runtime meta-data will help you track down the problem. Which two product features will help you isolate the cause of the problem? (Choose two.)
- A. Use job run operational meta-data reports from IS Manager.
- B. Show Performance Statistics in the Designer.
- C. Job Monitor Tool in the Director Client
- D. $APT_PM_PLAYER_STATS
Answer: B,C
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