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IBM Assessment: IBM InfoSphere DataStage v9.1 Assessment Sample Questions:

1. A job validates account numbers with a reference file using a Join stage, which is hash partitioned by account number. Runtime monitoring reveals that some partitions process many more rows than others. Assuming adequate hardware resources, which action can be used to improve the performance of the job?

A) Replace the Join with a Merge stage.
B) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
C) Change the number of nodes in the configuration file.
D) Add a Sort stage in front of the Join stage. Sort by account number.

2. When using Runtime Column Propagation, which two stages require a schema file? (Choose two.)

A) Column Import stage
B) DB2 Connector stage
C) Sequential File stage
D) Pivot stage
E) Peek stage

3. Which two statements are true about the use of named node pools? (Choose two.)

A) Named node pools limit the total number of partitions that can be specified in the configuration file.
B) Named node pools constraints will limit stages to be executed only on the nodes defined in the node pools.
C) When named node pools are used, DataStage uses named pipes between stages.
D) Grid environments must have named node pools for data processing.
E) Named node pools can allow separation of buffering from sorting disks.

4. Which stage classifies data rows from a single input into groups and computes totals?

A) Aggregator stage
B) Compare stage
C) Transformer stage
D) Modify stage

5. What stage allows for more than one reject link?

A) Join stage
B) Funnel stage
C) Lookup stage
D) Merge stage

Solutions: