InfoSphere DataStage v8.5: C2090-421 Exam
"InfoSphere DataStage v8.5", also known as C2090-421 exam, is a IBM Certification. With the complete collection of questions and answers, PrepAwayPDF has assembled to take you through 194 Q&As to your C2090-421 Exam preparation. In the C2090-421 exam resources, you will cover every field and category in IBM Specialist Certification helping to ready you for your successful IBM Certification.
- Exam Code: C2090-421
- Exam Name: InfoSphere DataStage v8.5
- Certification Provider: IBM
- Corresponding Certification: IBM Specialist
- Updated: Sep 14, 2026
- No. of Questions: 194 Questions & Answers with Testing Engine
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IBM C2090-421 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Performance Tuning and Optimization | - Parallel processing optimization
|
| Topic 2: Data Integration and Connectivity | - Data sources and connectors
|
| Topic 3: DataStage Architecture and Components | - InfoSphere DataStage architecture overview
|
| Topic 4: Administration and Troubleshooting | - Monitoring and debugging jobs
|
| Topic 5: Job Design and Development | - Server jobs and parallel jobs design
|
IBM InfoSphere DataStage v8.5 Sample Questions:
A script invokes an update job called "UpdateKeys" via a command line invocation of the dsjob command. The service is to wait for the completion and status of this job before continuing with the rest its tasks. Which three commands would invoke the "UpdateKeys" job in the MigrationProject and wait for its completion status? (Select three)
- A. dsjob -run MigrationProject UpdateKeys
- B. dsjob-run-wait MigrationProject UpdateKeys
- C. dsjob-run-userstatus MigrationProject UpdateKeys
- D. dsjob -run -log dsjob -run -userstatus MigrationProject UpdateKeys
- E. dsjob -run -jobstatus MigrationProject UpdateKeys
Correct Answer: B,C,D 🗳️
An important top level Job Sequence has been modified. It controls a process flow consisting of sub Job Sequences, Routines and Parallel Jobs. You must set up a new project to test the top level Job Sequence. You are not allowed to move any repository objects that are not impacted by the top level Job Sequence.
What two options would identify only the repository objects impacted by the change made to the top level Job Sequence? (Select two)
- A. Click Impact Analysis Icon on Designer Client Toolbar.
- B. Repository Advanced Find Where Used
- C. On Export check Include dependencies of
- D. Select the top Level Job Sequence and Dependency of (deep).
Correct Answer: B,C 🗳️
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 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".
- B. Add a Sort stage before the Copy stage and specify Auto partitioned for the links going into the Aggregator and Join stages.
- C. Add a Sort stage before the Copy stage and specify Same partitioners for the links going into the Aggregator and Join stages.
- 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: A,C 🗳️
You need to find the differences between the jobs in the Test project and theit older version in the Production project. You discover that the Production project is on another domain. What feature would find the differences in a job that is in a project on a different domain?
- A. Cross Project Compare
- B. Cross Domain Compare
- C. DataStage Version Control
- D. Export from the other domain and import into a project in the same domain as the one you are working in.
Correct Answer: A 🗳️
You have a 3TB dataset hash-partitioned on CustID in a clustered environment. You need to join this dataset with 1GB of reference data on OrderID. Which technique is most appropriate?
- A. Use Lookup stage, select auto partitioning for the stream link and entire partitioning for the reference link.
- B. Use Lookup stage, select auto partitioning for both link.
- C. Use Join stage, hash-partition and sort both link on OrderID.
- D. Use Lookup stage, select auto partitioning for the stream link and hash-partition the reference link on CustI
Correct Answer: A 🗳️
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