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IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. You have a DataStage job on SMP environment. It contains an input sequential file, a Modify stage, followed by a Transformer stage, and an output Sequential File stage. The job is run with three nodes. The engine uses all default settings. How many processes will this job create?

A) 12
B) 19
C) 9
D) 16

2. What conditions are necessary for a master record and an update record to merge?

A) none of the columns in the input record match the columns in the update record
B) some of the columns in the input record match the columns in the update record
C) both records have the same values for the merge key column(s) that you specify
D) all of the columns in the input record match the columns in the update record

3. Using a DB2 for z/OS source database, a 200 million row source table with 30 million distinct values must be aggregated to calculate the average value of two column attributes. What would provide optimal performance while satisfying the business requirements?

A) Using custom SQL with AVG functions and a DISTINCT clause, select all source rows using a DB2 Enterprise stage.
B) Select all source rows using a DB2 API stage. Aggregate using a Sort Aggregator.
C) Using custom SQL with an ORDER BY clause based on key columns, select all source rows using the DB2 API stage. Aggregate using a Hash Aggregator.
D) Select all source rows using a DB2 Enterprise stage, use a parallel Sort stage with the specified sort keys, calculate the average values using a parallel Transformer with stage variables and output link constraints.

4. Which two statements are true about Transformer loop processing? (Select two)

A) Stage variables can be referenced in loop conditions.
B) Loop variable expressions are executed before output link column expressions.
C) Loop conditions are evaluated once for each input row.
D) Loop variable expressions are executed before stage variable expressions.

5. A job contains a Sort stage that sorts a large volume of data across a cluster of servers. Due to new requirements, the customer has requested that this sorting be done on a subset of servers identified in the configuration file to minimize impact on database nodes. The $APT_CONFIG_FILE shows no sort disk pool for any node. Which two steps will accomplish this? (Choose two.)

A) Create a sort scratch disk pool with a subset of nodes in the parallel configuration file.
B) Use the environment variable $APT_SCRATCH_SPACE_SORT_USAGE.
C) Define a non-default node pool with a subset of nodes in the parallel configuration file.
D) Assign a separate config file just for the Sort stage.
E) Have an appropriate node constraint within the Sort stage.

Solutions: