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IBM A2090-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Transformation and Processing | 25% | - Handling NULL values and data types - Lookup and reference data - Transformer stage logic - Slowly Changing Dimensions (SCD) |
| Topic 2: Job Design and Development | 30% | - Parameter sets and environment variables - Stage usage and configuration - Data linking and partitioning - Sequential and parallel job creation |
| Topic 3: Advanced Features and Integration | 10% | - Job sequences and control flow - Source control integration - Metadata management |
| Topic 4: DataStage Architecture and Components | 20% | - Project and repository management - InfoSphere Information Server architecture - Parallel framework concepts - Client and server components |
| Topic 5: Job Execution, Monitoring and Troubleshooting | 15% | - Performance optimization - Director client usage - Debugging and validation - Job logs and error handling |
IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:
1. Which requirement must be met to read from a database in parallel using the ODBC connector?
A) Configure environment variable $APT_MAX_TRANSPORT_BLOCK_SIZE.
B) Configure environment variable $APT_PARTITION_COUNT.
C) ODBC connector always reads in parallel.
D) Set the Enable partitioning property to Yes.
2. A job design consists of an input SequentialFile stage, followed by a Peek stage, a Transformer stage, a Sort stage and finally an output Dataset stage. The job executes on an SMP system with a configuration file defined with 4 nodes.
The environment variable $APT_DISABLE_COMBINATION is set to "True". How many processes will this job create?
A) 21
B) 17
C) 12
D) 19
3. What are two ways to specify a stylesheet in an XML input stage? (Choose two.)
A) On the output link advanced properties tab, load the content or path of a stylesheet that is stored on the engine tier host.
B) On the output link columns properties tab, identify an input column that contains the stylesheet URL.
C) On the output link columns properties tab, type the stylesheet in the XLST box.
D) On the output link advanced properties tab, type the stylesheet in the Stylesheet box.
4. A dataset was created earlier with one partition, with the Preserve Partitioning flag set. A subsequent job using a 2-node configuration file reads from that dataset, passing data to a Transformer stage with "Same" partitioning.
Which two statements are true? (Select two)
A) Setting the Preserve Partitioning flag to "Set" will run one instance of the Transformer stage.
B) Setting the Preserve Partitioning flag to "Clear" will generate two instances of the Transformer stage.
C) DataStage will repartition the data and run one instance of the Transformer stage.
D) Inserting a Sort stage prior to the Transformer stage will force its parallel execution.
E) The DataStage job will abort.
5. Which of the following describes a type two update in a Slowly Changing Dimensions (SCD) stage?
A) An update that replaces the existing column value if a specified condition is satisfied.
B) An update that overwrites the existing column value.
C) An update the retains the existing column value in an historical row and creates a new row with the new value.
D) An update that retains the existing column value in a list and adds the new value to the list.
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: B | Question # 3 Answer: A,D | Question # 4 Answer: B,C | Question # 5 Answer: D |



