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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. 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 an ORDER BY clause based on key columns, select all source rows using the DB2 API stage. Aggregate using a Hash Aggregator.
B) Select all source rows using a DB2 API stage. Aggregate using a Sort Aggregator.
C) Using custom SQL with AVG functions and a DISTINCT clause, select all source rows using a DB2 Enterprise stage.
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.

2. What two stages are required to place Header and Detail records, which have different formats, into a single format? (Choose two.)

A) Column Export Stage
B) Combine Stage
C) Column Import Stage
D) Funnel Stage

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

4. You are responsible for deploying objects into your customers production environment. To ensure the stability of the production system the customer does not permit compilers on production machines. They have also protected the project and only development machines have the required compiler. What two options will allow jobs with a parallel transformer to execute in the customers production machines? (Choose two.)

A) Add $APT_COMPILE_OPT=-portable
B) Create a package with Information Server Manager and select the option to include executables.
C) Export the jobs with Information Server Manager with the executables.
D) Set $APT_COPY_TRANSFORM_OPERATOR

5. In a Transformer, which two of the following mappings can be handled by default type conversions. (Select two)

A) Integer input column mapped to string output column.
B) String input column mapped to integer output column.
C) String input column mapped to a data output column.
D) Integer input column mapped to raw output column.
E) Date input column mapped to a string output column.

Solutions: