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IBM A2090-421 : Assessment: InfoSphere DataStage v8.5
- Exam Code: A2090-421
- Exam Name: Assessment: InfoSphere DataStage v8.5
- Updated: Sep 06, 2026
- Q & A: 194 Questions and Answers
About IBM A2090-421 Exam
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IBM A2090-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Data Integration and Connectivity | 15% | - File handling and formats - Database connectivity and stages - Specialized stages and connectors |
| Environment and Configuration | 25% | - Configuration files and environment variables - Distributed and asymmetric environments - Project setup and administration |
| Administration and Deployment | 10% | - Job packaging and deployment - Version control and migration - Monitoring and logging |
| Job Design and Development | 30% | - Partitioning and collecting methods - Stage configuration and properties - Transformer and derivation logic - Parallel job design principles |
| Performance and Tuning | 20% | - Resource management - Buffer and sort tuning - Job optimization and scaling |
IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:
Question #1
In the job fragment shown in the exhibit, there are two Sort stages: the first (Sort1) sorts the data by state, the second (Sort2) sorts the data by state and area, No repartitioning occurs between the stages.
You have been asked to reduce the number of sorts to improve the performance of the job.
Which two ways might be used to accomplish this without changing how the job functions? (Select two)
- A. In the second Sort stage change the Sort Mode property of the area column to "Don't sort, previously sorted.".
- B. Remove the first Sort stage. Retain the existing sort keys in the second Sort stage.
- C. Remove the second Sort stage. Add area as an additional sort key.
- D. In the second Sort stage change the Sort Mode property of the state column to "Don't sort, previously sorted.".
Correct Answer: A,B 🗳️
Question #2
You are responsible for deploying objects into your customers production environment. To ensure the stability of the production system the customer does not permit compilers on production machines. They have also protected the project and only development machines have the required compiler. What two options will allow jobs with a parallel transformer to execute in the customers production machines? (Choose two.)
- A. Add $APT_COMPILE_OPT=-portable
- B. Export the jobs with Information Server Manager with the executables.
- C. Set $APT_COPY_TRANSFORM_OPERATOR
- D. Create a package with Information Server Manager and select the option to include executables.
Correct Answer: B,D 🗳️
Question #3
You have a dataset hash-partitioned and sorted on CustID. You need to create a Sequential File sorted on CustID from this dataset. Which technique is the most appropriate?
- A. Insert Sort stage before the final Sequential File stage and use Round Robin collector for the Sequential File stage input link.
- B. Insert Sort stage before the final Sequential File stage and use Ordered collector for the Sequential File stage input link.
- C. Use SortMerge collector for the Sequential File input link.
- D. Use Copy stage.
Correct Answer: C 🗳️
Question #4
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 Same partitioners for the links going into the Aggregator and Join stages.
- B. 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".
- 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 Copy stage and specify Auto partitioned for the links going into the Aggregator and Join stages.
Correct Answer: A,C 🗳️
Question #5
Which two job design techniques can be used to provide unique names to sequential output files that are used in multi-instance jobs? (Select two)
- A. Use the file name(s) from values contained in the data stream.
- B. Use parameters to identify file names.
- C. Prepend/append the Invocation ID to the file name.
- D. Create the file name(s) from values contained in a value file.
Correct Answer: B,C 🗳️
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