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 | Weight | Objectives |
|---|---|---|
| Configuration | 6% | - Understand architecture and components - Install and configure InfoSphere DataStage v8.5 - Create and configure projects |
| Parallel Architecture | 9% | - Data partitioning and collecting - Parallel execution and configuration files - Node pools and parallel processing |
| Metadata Management | 6% | - Runtime Column Propagation (RCP) - Schema orchestration - Import and share metadata |
| Advanced Techniques | 10% | - Complex Flat File (CFF) stage - Job deployment and packaging - Environment variables and parameter sets |
| Persistent Storage | 10% | - Data sets and file structures - Restructure and format stages - Sequential files and file sets |
| Database Connectivity | 9% | - ODBC, DB2, Oracle integration - Source and target database properties - Database stage selection |
| Job Design & Development | 25% | - Lookup, Join, Merge, and Funnel stages - Transformer and derivation logic - Job sequences and parameterization - Slowly Changing Dimensions (SCD) |
| Performance & Troubleshooting | 15% | - Partitioning and sorting optimization - Monitor and log execution - Handle errors and rejects |
IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:
Using a DB2 for z/OS source database, a 200 million row source table with 30 million distinct values must be aggregated to calculate the average value of two column attributes. What would provide optimal performance while satisfying the business requirements?
- A. Using custom SQL with AVG functions and a DISTINCT clause, select all source rows using a DB2 Enterprise stage.
- B. Select all source rows using a DB2 Enterprise stage, use a parallel Sort stage with the specified sort keys, calculate the average values using a parallel Transformer with stage variables and output link constraints.
- C. Using custom SQL with an ORDER BY clause based on key columns, select all source rows using the DB2 API stage. Aggregate using a Hash Aggregator.
- D. Select all source rows using a DB2 API stage. Aggregate using a Sort Aggregator.
Correct Answer: D 🗳️
You are about to begin major changes to jobs in a project. You want to conveniently identify job changes on an ad hoc basis. What two tasks will allow you to identify changes to your jobs? (Choose two.)
- A. Import the original job from a .dsx export.
- B. Select the job, then right click Cross Project Compare.
- C. Select the job, then right click Compare within.
- D. Before making a change to a job make a copy of the job in a different category folder.
Correct Answer: C,D 🗳️
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 -jobstatus MigrationProject UpdateKeys
- B. dsjob -run -log dsjob -run -userstatus MigrationProject UpdateKeys
- C. dsjob-run-wait MigrationProject UpdateKeys
- D. dsjob -run MigrationProject UpdateKeys
- E. dsjob-run-userstatus MigrationProject UpdateKeys
Correct Answer: B,C,E 🗳️
The number of File Set data files created depends upon what three items? (Choose three.)
- A. File system limitations.
- B. Number of physical processing nodes.
- C. Schema definition of the file.
- D. Number of processing nodes in the default node pool.
- E. Number of disks in the export or default disk pool connected to each processing node in the default node pool
Correct Answer: A,D,E 🗳️
How is DataStage Table Metadata shared among DataStage projects?
- A. DataStage Tables cannot be shared between projects.
- B. Export DataStage Table Definitions from one project and importing them into another project.
- C. Use the Import/Export Manager to move the DataStage Table Definition to the projects where it is needed.
- D. Import another copy of the table metadata into the project where it is required.
- E. Use the "Shared Table Creation Wizard" to create a copy of the table in the shared repository.
Correct Answer: E 🗳️
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