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IBM A2090-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DataStage Architecture and Components | 20% | - Project and repository management - Parallel framework concepts - Client and server components - InfoSphere Information Server architecture |
| Topic 2: Job Execution, Monitoring and Troubleshooting | 15% | - Director client usage - Job logs and error handling - Debugging and validation - Performance optimization |
| Topic 3: Advanced Features and Integration | 10% | - Source control integration - Job sequences and control flow - Metadata management |
| Topic 4: Job Design and Development | 30% | - Stage usage and configuration - Parameter sets and environment variables - Data linking and partitioning - Sequential and parallel job creation |
| Topic 5: Data Transformation and Processing | 25% | - Transformer stage logic - Slowly Changing Dimensions (SCD) - Handling NULL values and data types - Lookup and reference data |
IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:
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 🗳️
Which statement is true about buffering?
- A. The framework uses /tmp by default for buffering on Unix systems.
- B. The "buffer" scratch disk pool needs to be defined to allow the framework to perform data buffering.
- C. The buffer operator uses both memory and disk storage.
- D. In a clustered environment, using a disk space on an NFS mount for buffering improves performance.
Correct Answer: C 🗳️
Which three data types can the ODBC Enterprise stage handle? (Choose three.)
- A. SQL_CLOB
- B. SQL_TIMESTAMP
- C. SQL_VARBINARY
- D. SQL_BIGINT
- E. SQL_SMALLDATETIME
Correct Answer: B,C,D 🗳️
Which job design technique can be used to give unique names to sequential output files that are used in multi-instance jobs?
- A. Generate unique file names by using a macro.
- B. Use DSJobInvocationID to generate a unique filename.
- C. Use a Transformer stage variable to generate the name.
- D. Use parameters to identify file names.
Correct Answer: D 🗳️
To better understand the data flowing through a job, it is desirable to have structural information about the datasets captured in the job log. Which environment variable can provide this information?
- A. $APT_PM_PLAYER_MEMORY
- B. $OSH_PRINT_SCHEMAS
- C. $OSH_STDOUT_MSG
- D. $APT_NO_PART_INSERTION
Correct Answer: B 🗳️
