Exam Name: InfoSphere DataStage v8.5
Certification Provider: IBM
Corresponding Certification: IBM Specialist
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IBM C2090-421 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Connectivity and Data Sources | - Database connectors and stages - File handling (sequential and complex files) |
| Topic 2: Performance Tuning and Optimization | - Parallel job optimization techniques - Partitioning and parallelism strategies |
| Topic 3: Job Design and Development | - Designing DataStage jobs - Data flow and job sequencing - Transformations and stages usage |
| Topic 4: DataStage Architecture and Concepts | - Server vs parallel jobs overview - Parallel processing architecture - InfoSphere DataStage components |
| Topic 5: Debugging and Administration | - Logging and error handling - Job monitoring and troubleshooting |
IBM InfoSphere DataStage v8.5 Sample Questions:
In which two situations would you use the Web Services Client stage? (Choose two.)
- A. You want to deploy a service.
- B. You do not need both input and output links in a single web service operation.
- C. You need the Web service to act as either a data source or a data target during an operation.
- D. You need to create a WSDL.
Correct Answer: B,C 🗳️
Which of the following describes what happens when Runtime Column Propagation is enabled?
- A. An input column value flows into a target column based on its position in the input row. For example, first column in the input row goes into the first target column.
- B. An input column value flows into a target column based on its position in a Schema file.
- C. An input column value flows into a target column only if it matches it by name.
- D. An input column value flows into a target column only if it is explicitly mapped to it.
Correct Answer: C 🗳️
Which Oracle Enterprise stage read property can be set using -dboptions to tune job performance?
- A. memsize
- B. arraysize
- C. partitionsize
- D. transactsize
Correct Answer: B 🗳️
A customer requires that a single output file generated by a parallel job be created in sort order. Which two job designs would achieve this goal? (Choose two.)
- A. Write the result to a parallel dataset, then write a shell script to convert the dataset records to text format, in sorted order.
- B. Specify both partition and sort key columns on the input to the target SequentialFile stage.
- C. Set the "Execution Mode" in the Advanced stage properties tab of the parallel Sort stage to execute sequentially.
- D. Insert a sorted Funnel stage before the input to the output SequentialFile stage.
- E. Use a parallel sort and partition the input to the SequentialFile stage using a Sort Merge collector.
Correct Answer: C,E 🗳️
Configuring the weighting column of an Aggregator stage affects which three options. (Choose three.)
- A. Maximum Value
- B. Percent Coefficient of Variation
- C. Sum of Weights
- D. Sum
- E. Corrected Sum of Squares
Correct Answer: B,C,D 🗳️
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