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IBM Websphere Datastage V.8.0 Sample Questions:

1. The Change Apply stage produces a change Data Set with a new column representing the code for the type of change. What are three change values identified by these code values? (Choose three.)

A) Deleted
B) Remove Duplicates
C) Final
D) Edit
E) Copy

2. Click the Exhibit button.
A customer is complaining of poor performance from the job shown in the exhibit, which aggregates and joins on ZIP code. Currently all partitioning is set to "Auto" and sort/partition insertion is allowed. What would give the best performance improvement for the job?

A) Hash partition and sort on ZIP code prior to the Copy stage, and use same partitioning on the Aggregator and Join stages.
B) Hash partition and sort on ZIP code on the input links to the Aggregator and Join stages.
C) Use same partitioning on all input links in the job; create the input data set by hash-partitioning its input on ZIP code.
D) Hash partition and sort on ZIP code prior to the Copy stage and use entire partitioning on the output of the Aggregator stage.

3. Click the Exhibit button.
In the exhibit, data is being read from a Sequential File stage (Read_Selling_Group_Mapping) and written to a target Data Set stage (Write_Selling_Group_Mapping_Copy). All columns are being mapped source to target in the Copy stage. After the job is executed using a 2-node configuration file, you notice that the Data Set has only one partition. Which setting should be set to ensure Data Set has two partitions?

A) Disable Runtime Column Propagation (RCP) in both the Copy stage and the Data Set stage.
B) Change partitioning method from "Auto" to "SAME" in the Copy stage.
C) Enable Runtime Column Propagation (RCP).
D) Change partitioning method from "Auto" to "Round Robin" in the Copy stage.

4. A job design reads from a complex flat file, performs some transformations on the data, and outputs the results to a WISD output stage. What are two ways that parameter values can be passed to this job at run-time? (Choose two.)

A) Pass the parameter values at the time of the service request.
B) Execute a DSSetParam with the values at job execution time.
C) Include the parameter values in the data.
D) Change the properties of the information provider and redeploy.

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

Solutions: