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IBM Websphere Datastage V.8.0 Sample Questions:

1. Which two partitioning methods are keyless? (Choose two.)

A) Modulus
B) Hash
C) Round Robin
D) Entire

2. Which three are supported by the Slowly Changing Dimensions (SCD) stage? (Choose three.)

A) Type one updates to a dimension table.
B) Inserts into a dimension table.
C) Type two updates to a dimension table.
D) Type two upserts to a dimension table.
E) Type three updates to a dimension table.

3. You have a parallel job that does not scale beyond two nodes. After investigation you find that the data has been partitioned on a DoNotCall flag, which has only "Y" or "N" values, and you have an Aggregator stage that is accumulating totals based on this flag using a sort method. Which two techniques could you use to allow the job to scale? (Choose two.)

A) Change the preserve partitioning option on the stage ahead of the aggregator to clear partitioning.
B) Add an additional column for partitioning to result in additional data partitions.
C) Change the aggregation method to hash to eliminate the blocking sort operation.
D) Change the partitioning method to Round Robin; add a second Aggregator stage, running sequentially, that re-aggregates based on the DoNotCall flag.

4. A job validates credit card numbers with a reference file using a Join stage and is hash partitioned by card number. Examination of Job Monitor reveals that some partitions process many more rows than others. Assuming adequate hardware resources, which two actions can be used to improve the performance of the job? (Choose two.)

A) Alter the number of partitions in the $APT_CONFIG_FILE.
B) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
C) Add an additional column to the hash keys.
D) Break the input file into multiple files.

5. Which two system variables/techniques must be used in a parallel Transformer derivation to generate a unique sequence of integers across partitions? (Choose two.)

A) @INROWNUM+1
B) @INROWNUM
C) @NUMPARTITIONS
D) @PARTITIONNUM

Solutions: