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IBM Websphere Datastage V.8.0 Sample Questions:

1. Your customer asks you to identify which stages in a job are consuming the largest amount of CPU time. Which product feature would help identify these stages?

A) $APT_PM_DUMP_SCORE
B) $APT_PM_PLAYER_TIMING
C) $APT_PM_PLAYER_CPU
D) $APT_PM_SHOW_PIDS

2. You have a nullable input column that can be mapped to a non-nullable output column.
Which three NULL handling techniques can be used in the Transformer stage for that column? (Choose three.)

A) NullToEmpty(input_column)
B) If IsNull(input_column) then
C) NullToValue(input_column)
D) If input_column = then
E) If input_column = NULL then

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

4. When tuning a parallel process, it is necessary to measure the amount of system resources that are used by each instance of a stage. Which two methods enable the collection of CPU time used by each instance of a stage? (Choose two.)

A) Set the environment variable $APT_PM_PLAYER_TIMING=true.
B) Set the environment variable $DS_MAKE_JOB_REPORT=2.
C) Select the Record job performance data check box from Job Properties.
D) Invoke vmstat before the job run and after the job completes.

5. Click the Exhibit button.
In the exhibit, what describes how you would make a stage run only on "Server2" in parallel?

A) Set node pool constraint to s2.
B) Set server constraint to Server2.
C) Set node pool constraint to s1.
D) Set constraint to n3 and n4.

Solutions: