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IBM Assessment: IBM InfoSphere DataStage v9.1 Assessment Sample Questions:

1. 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) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
B) Replace the Join with a Merge stage.
C) Change the number of nodes in the configuration file.
D) Add a Sort stage in front of the Join stage. Sort by account number.

2. A 100MB input dataset has even distribution across 400 unique key values. When you run with a 4-node configuration file, which two changes could improve sort performance in this scenario? (Choose two.)

A) Specify "Restrict Memory Usage" to 60MB on the Sort stage properties.
B) Set $APT_TSORT_STRESS_BLOCKSIZE to 50M
C) Specify Round Robin partitioning on the input link to the Sort stage.
D) Convert all numeric fields to varchars.
E) Alter the Sort stage properties to perform a stable sort.

3. You would like to run a particular processing job within a job sequence for each weekday. What two methods could be used? (Choose two.)

A) Add the job scheduler stage to the job sequence and set to weekdays only.
B) Start Loop and End Loop activity stages on the job sequencer canvas where you loop through the days and pass a value for each day into the job via parameter.
C) Have a parameter set that contains the days of the week you would like to process and routine to parse the days of the week contained in the "day" parameter.
D) Set the frequency property in the job scheduler to weekdays only.
E) Call a routine in the job sequencer that starts the processing job for each day you would like to process.

4. 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) 6
B) 12
C) 8
D) 10

5. What two repositories does the Source Code Control Integration for DataStage and QualityStage serve? (Choose two.)

A) Source Code Repository
B) Information Analyzer Repository
C) Universe Project Repository
D) Information Server metadata Repository
E) WebSphere Repository

Solutions: