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IBM Websphere Datastage V.8.0 Sample Questions:

1. A parallel job combines rows from a source DB2 table with historical information maintained in two separate Oracle tables. Only rows in the DB2 source whose key values match either Oracle table are output to a target Teradata table. Both Oracle tables have identical column definitions and are stored in the same Oracle instance. Which two design techniques would satisfy this requirement? (Choose two.)

A) Combine the inputs from the DB2 Enterprise stage and two Oracle Enterprise stages using the Sort options of the Funnel stage defined onthe key columns.
B) Using a master DB2 Enterprise stage, merge by dropping unmatched masters against a single Oracle Enterprise stage with custom SQL with UNION ALL.
C) Use a separate Oracle Enterprise stage for each source table to a Funnel stage and then perform an inner join with rows from a DB2 Enterprise stage.
D) Use a Lookup stage to combine the DB2 Enterprise input with each Oracle Enterprise reference link using range partitioning to limit each reference by historical data values.

2. A credit card company has about 10 million unique accounts. The company needs to determine the outstanding balance of each account (Account_id) by aggregating the previous balance with current charges. A multi-node DataStage job with an Aggregator stage is being used to perform this calculation. Which three tasks are required for optimal performance? (Choose three.)

A) Sort data on Account_id going into the Aggregator stage.
B) Use "Sort" Aggregator method.
C) Use "Hash" Aggregator method.
D) Use "Round Robin" partition on Account_id for even distribution of records.
E) Use "Hash" partition on Account_id going into the Aggregator stage.

3. The result of a performance review for one of your job designs indicated this job needs to be split into two separate jobs. You also have been given the requirement to insure you maintain parallelism (no re-partitioning) between these two new jobs. Which single stage should you consider to accomplish maintaining parallelism and not introduce re-partitioning between these related jobs?

A) Named Pipe stage
B) Copy stage
C) Data Set stage
D) Sequential File stage

4. You are using the Change Capture stage in your job design to identify changes made to the input link (before image) to obtain the results in the output link. This job will be using a multi-node configuration file when executed. What are two requirements on the input link data for the Change Capture stage? (Choose two.)

A) Sequential mode
B) Merged links
C) Key partitioned
D) Sorted

5. Which feature does the Merge stage have that is not available in the Join and Lookup stages?

A) Input data may be unsorted.
B) Several reject links may be specified.
C) All inputs must be sorted.
D) No more than one reject link may be specified.

Solutions: