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IBM Assessment: InfoSphere DataStage v8.5 : A2090-421
Exam Code: A2090-421
Exam Name: Assessment: InfoSphere DataStage v8.5
Updated: Sep 14, 2026
Q & A: 194 Questions and Answers
A2090-421 Free Demo download
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IBM A2090-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Administration and Deployment | 10% | - Version control and migration - Monitoring and logging - Job packaging and deployment |
| Topic 2: Data Integration and Connectivity | 15% | - Database connectivity and stages - Specialized stages and connectors - File handling and formats |
| Topic 3: Job Design and Development | 30% | - Stage configuration and properties - Transformer and derivation logic - Parallel job design principles - Partitioning and collecting methods |
| Topic 4: Environment and Configuration | 25% | - Project setup and administration - Configuration files and environment variables - Distributed and asymmetric environments |
| Topic 5: Performance and Tuning | 20% | - Buffer and sort tuning - Job optimization and scaling - Resource management |
IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:
Question #1
You have a parallel shared container that is used by other parallel jobs within your project. Part of the logic in this shared container has been changed. Which two statements are true regarding this change to the parallel shared container? (Choose two.)
- A. Jobs using this parallel shared container need to be re-compiled only when the metadata of the container is changed.
- B. Use usage analysis and multi-compile to re-compile job using this shared container.
- C. You can create a sequencer to re-compile all of the routines using this shared container.
- D. Jobs using this parallel shared container need to be re-compiled.
Answer: B,D
Question #2
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. Transformer stage
- B. Filter stage
- C. Switch stage
- D. Compare stage
Answer: A
Question #3
When you run a parallel job, any error messages and warnings are written to the job log and can be viewed from the Director client. What two levels of message handlers are there? (Choose two.)
- A. stage level
- B. record level
- C. project level
- D. job level
Answer: C,D
Question #4
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. All columns are delimited by a comma, except for the final column in a row.
- B. Rows are delimited by a UNIX newline.
- C. Variable length columns are contained within double quotes.
- D. All columns are delimited by a comma.
- E. Rows are delimited by a DOS newline.
Answer: A,B,C
Question #5
A customer is complaining of poor performance from the job shown in the exhibit, which aggregates and joins on ZIP code. Currently all partitioning is set to "Auto" and sort/partition insertion is allowed.
What would give the best performance improvement for the job?
- A. Hash partition and sort on ZIP code prior to the Copy stage and use entire partitioning on the output of the Aggregator stage.
- B. Hash partition and sort on ZIP code on the input links to the Aggregator and Join stages.
- C. Use same partitioning on all input links in the job; create the input data set by hash-partitioning its input on ZIP code.
- D. Hash partition and sort on ZIP code prior to the Copy stage, and use same partitioning on the Aggregator and Join stages.
Answer: D
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