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IBM Certified Solution Developer - IBM InfoSphere DataStage Sample Questions:

1. Configuring the weighting column of an Aggregator stage affects which two options. (Choose two.)

A) Maximum Value
B) Uncorrected Sum of Squares
C) Coefficient of Variation
D) Average of Weights
E) Sum

2. 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) Add a Sort stage in front of the Join stage. Sort by account number.
D) Change the number of nodes in the configuration file.

3. What are the valid join operations for the Join stage? (Choose two.)

A) Right outer join
B) Inner join
C) Bottom inner join
D) Top outer join
E) Where join

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

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

5. In a Transformer expression for a stage variable, there is a nullable input column. Assume the legacy NULL processing option is turned off. What happens when a row is processed that contains NULL in that input column?

A) The value written to the stage variable is undetermined.
B) The row is rejected.
C) The job aborts.
D) NULL is written to the stage variable.

Solutions: