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IBM Certified Solution Developer - IBM InfoSphere DataStage Sample Questions:

1. What two binding types are supported by Information Services Director (ISD) for a parallel job that is designed to be used as a service? (Choose two.)

A) EJB
B) SOAP
C) HDFS
D) SQL
E) STREAMS

2. A DataStage job uses an Inner Join to combine data from two source parallel datasets that were written to disk in sort order based on the join key columns. Which two methods could be used to dramatically improve performance of this job? (Choose two.)

A) Disable job monitoring.
B) Explicitly specify hash partitioning and sorting on each input to the Join stage.
C) Unset the Preserve Partitioning flag on the output of each parallel dataset.
D) Add a parallel sort stage before each Join input, specifying the "Don't Sort, Previously Grouped" sort key mode for each key.
E) Set the environment variable $APT_SORT_INSERTION_CHECK_ONLY.

3. A job design consists of an input Sequential Files stage, a Sort stage, followed by a Transformer stage and an output Sequential File stage. In the input Sequential Files stage, the "Number of readers per node" property has been set to 3. The job is run on an SMP machine with a configuration file defined with 3 nodes. The $APT_DISABLE_COMBINATION variable is set to True. How many player processes will this job generate?

A) 12
B) 8
C) 10
D) 6

4. You are processing groups of rows in a Transformer. The first row in each group contains "1" in the Flag column and "0" in the remaining rows of the group. At the end of each group you want to sum and output the QTY column values. Which technique will enable you to retrieve the sum of the last group?

A) Output a running total for each group for each row. Follow the Transformer stage by an
Aggregator stage. Take the MAX of the QTY column
for each group.
B) Output the sum that you generated up to the previous row each time you process a row with a
"1" in the Flag column. Use the FirstRow()
function to determine when the group is done.
C) Output the sum that you generated up to the previous row each time you process a row with a
"1" in the Flag column.
D) Output the sum that you generated each time you process a row for which the LastRow()
function returns True.

5. The number of File Set data files created depends upon what two items? (Choose two.)

A) Number of logical processing nodes.
B) Operating system limitations.
C) Amount of memory.
D) Schema definition of the file.
E) Number of disks in the export or default disk pool connected to each processing node in the default node pool.

Solutions: