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IBM C2090-421 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Job Execution and Troubleshooting | - Monitoring and debugging
|
| Topic 2: DataStage Architecture | - InfoSphere DataStage components
|
| Topic 3: Data Transformation and ETL Logic | - Data mapping and transformation rules
|
| Topic 4: Job Design and Development | - Job types
|
| Topic 5: Performance and Parallelism | - Parallel processing concepts
|
IBM InfoSphere DataStage v8.5 Sample Questions:
A job validates credit card numbers with a reference file using a Join stage, which is hash partitioned by card number. Examination of Job Monitor reveals that some partitions process many more rows than others. Assuming adequate hardware resources, which action can be used to improve the performance of the job?
- A. Use Round Robin partitioning on the stream and Entire partitioning on the reference.
- B. Alter the number of partitions in the $APT_CONFIG_FILE.
- C. Break the input file into multiple files.
- D. Replace the Join with a Merge stage.
Correct Answer: B 🗳️
In a Transformer, which two of the following mappings can be handled by default type conversions. (Select two)
- A. Date input column mapped to a string output column.
- B. Integer input column mapped to raw output column.
- C. String input column mapped to a data output column.
- D. Integer input column mapped to string output column.
- E. String input column mapped to integer output column.
Correct Answer: C,D 🗳️
A job needs to split a single Data Set into three Data Sets based on conditions that are supplied at runtime. Which stage would allow you to parameterize the conditions for splitting the input data set?
- A. Transformer stage
- B. Filter stage
- C. Split Vector stage
- D. Switch stage
Correct Answer: B 🗳️
How must the input data set be organized for input into the join stage? (Choose two.)
- A. Sorted in ascending order
- B. Key partitioned
- C. Unsorted
- D. Entire partitioned
- E. Hash partitioned
Correct Answer: A,B 🗳️
You have run ten instances of the same job the previous evening. You want to examine the job logs for all instances but can only find five of them. How can you avoid this in the future for this job?
- A. Change the Auto-purge settings in Administrator.
- B. Set the $APT_AUTOPURGE_LOG environment variable to False.
- C. Set the $APT_AUTOLOG_PURGE environment variable to False.
- D. Change the Auto-purge settings for the job in Director.
Correct Answer: D 🗳️
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