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IBM InfoSphere DataStage v8.5 Sample Questions:

1. Your job runs slowly and does not scale beyond two nodes. It appears the data has been partitioned on the DoNotCall flag, which has accumulating totals based on this flag using a sort method.
Which technique would improve scalability and performance?

A) Change the partitioning method to Round Robin; add a second Aggregator stage with Execution mode 'Sequential' and
B) Change the preserve partitioning option on the stage ahead of the aggregator to clear partitioning.
C) Increase the number of physical nodes available for partitioning.
D) Add an additional column for partitioning to result in additional data partitions.

2. Which two of the following derivations for an output column named OutCol can be used to generate a unique sequence of integers across multiple partitions?

A) NextSurrogateKey()
B) @INROWNUM
C) @PARTITIONNUM + @NUMPARTITIONS
D) 1 + @NUMPARTITIONS * @INROWNUM

3. The purchase history record contains CustID, ProductID, ProductType and TotalAmount. You need to retain the record of greatest TotalAmount per CustID and ProductType using RemoveDuplicate stage. Which two statements accomplish this requirement? (Choose two.)

A) Hash-partition on CustID and ProductType;
Sort on CustID, ProductType and TotalAmount.
B) Hash-partition on CustID, ProductType and TotalAmount;
Sort on CustID, ProductType and TotalAmount.
C) Hash-partition on CustID;
Sort on CustID, ProductType and TotalAmount.
D) Hash-partition on ProductType;
Sort on ProductType, CustID and TotalAmount.

4. In a file defining a partial schema, which three properties define the record? (Choose three.)

A) text
B) intact
C) record_delim_string
D) record_length
E) delim

5. Which two job design techniques can be used to provide unique names to sequential output files that are used in multi-instance jobs? (Select two)

A) Prepend/append the Invocation ID to the file name.
B) Use the file name(s) from values contained in the data stream.
C) Create the file name(s) from values contained in a value file.
D) Use parameters to identify file names.

Solutions: