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IBM Websphere Datastage V.8.0 Sample Questions:

1. Which stage does not require sorted input?

A) Remove Duplicates stage
B) Merge stage
C) Lookup stage
D) Join stage

2. 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) 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.
B) 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.
C) 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.
D) Using a master DB2 Enterprise stage, merge by dropping unmatched masters against a single Oracle Enterprise stage with custom SQL with UNION ALL.

3. Which two statements are true for named node pools? (Choose two.)

A) Using appropriately named node pools forces DataStage to use named pipes between stages.
B) Using appropriately named node pools is only available in clustered environments.
C) Using appropriately named node pools can allow separation of buffering from sorting disks.
D) Using appropriately named node pools constraints will limit stages to be executed only on the nodes defined in the node pools.

4. Which three statements are true about Transformer stage variables? (Choose three.)

A) A stage variable can be used in derivations.
B) A stage variable can be assigned values by derivations.
C) A stage variable derivation can be used to change a job parameter.
D) A stage variable derivation can use other stage variables.
E) A stage variable can evaluate to a null result.

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

Solutions: