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Exam Code: A2090-421
Exam Name: Assessment: InfoSphere DataStage v8.5
Certification Provider: IBM
Corresponding Certification: IBM Specialist
Exam Name: Assessment: InfoSphere DataStage v8.5
Certification Provider: IBM
Corresponding Certification: IBM Specialist
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IBM A2090-421 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Performance Tuning and Optimization | - Parallel job optimization
|
| InfoSphere DataStage Architecture | - Parallel processing architecture
|
| Job Control and Sequences | - Sequence jobs
|
| Job Design and Development | - Stages and links
|
| Data Transformation and Processing | - Aggregation and sorting
|
| Debugging and Troubleshooting | - Job monitoring
|
IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:
If you do not alter any of the Format settings, the Sequential File stage will produce a file with what three types of format? (Choose three.)
- A. Variable length columns are contained within double quotes.
- B. Rows are delimited by a DOS newline.
- C. All columns are delimited by a comma.
- D. All columns are delimited by a comma, except for the final column in a row.
- E. Rows are delimited by a UNIX newline.
Correct Answer: A,D,E 🗳️
Configuring the weighting column of an Aggregator stage affects which three options. (Choose three.)
- A. Sum
- B. Corrected Sum of Squares
- C. Percent Coefficient of Variation
- D. Maximum Value
- E. Sum of Weights
Correct Answer: A,C,E 🗳️
You are using the Change Capture stage in your job design to identify changes made to the input link (before image) to obtain the results in the output link. This job will be using a multi-node configuration file when executed.
What are two requirements on the input link data for the Change Capture stage? (Select two)
- A. Sequential mode
- B. Merged links
- C. Key partitioned
- D. Sorted
Correct Answer: A,B 🗳️
In the exhibit, the Aggregator stage aggregates over CustomerID. The Join stage joins by CustomerID. When the score is created, DataStage will insert hash partitioners and tsort operators to ensure the correct results.
Which two choices will eliminate sort operators from being inserted at run-time? (Select two)
- A. Add a Sort stage before the Copy stage and specify Auto partitioned for the links going into the Aggregator and Join stages.
- B. Add a Sort stage before the Copy stage and specify Same partitioners for the links going into the Aggregator and Join stages.
- C. Add Sort stages in front of the Join stage and specify the Same partitioner for the links going into the Join. Set the $APT_NO_SORT_INSERTION environment variable to "True".
- D. Add a Sort stage before the Aggregator stage and specify the Same partitioner for the link going into the Aggregator Set the $APT_SORTJNSERTION_CHECK_ONLY environment variable to "True".
Correct Answer: B,C 🗳️
A star schema data warehouse consists of four dimension tables and one fact table. How many Slowly Changing Dimensions (SCD) stages will you need in your jobs to update the star schema tables?
- A. two
- B. five
- C. four
- D. three
Correct Answer: C 🗳️
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