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Updated: Jun 01, 2026
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IBM InfoSphere DataStage v8.5 Sample Questions:
1. You have a dataset hash-partitioned and sorted on CustID. You need to create a Sequential File sorted on CustID from this dataset. Which technique is the most appropriate?
A) Insert Sort stage before the final Sequential File stage and use Ordered collector for the Sequential File stage input link.
B) Use Copy stage.
C) Use SortMerge collector for the Sequential File input link.
D) Insert Sort stage before the final Sequential File stage and use Round Robin collector for the Sequential File stage input link.
2. A job reads from a sequential file using a SequentialFile stage with option "number of readers" set to 2. This data goes to a Transformer stage and then is written to a dataset using the DataSet stage. The default configuration file has three nodes. The environment variable $APT_DISABLE_COMBINATION is set to "True" and partitioning is set to "Auto". How many processes will be created?
A) 5
B) 12
C) 9
D) 7
3. What are two advantages of using Runtime Column Propagation (RCP)? (Choose two.)
A) Only columns that are defined as VarChar need RCP enabled.
B) RCP is not a feature of DataStage.
C) Columns not specifically used in the flow are propagated as if they were.
D) Sequential files don't require schema files when using RCP.
E) Only columns used in the data flow need to be defined.
4. What is the lowest CPU cost partitioning method?
A) Entire
B) Round Robin
C) Hash
D) Random
5. You are processing groups of rows in a Transformer. The first row in each group contains "1" in the Flag column and "0" in the remaining rows of the group. At the end of each group you want to sum and output the QTY column values. Which three techniques will enable you to retrieve the sum of the last group? (Choose three.)
A) Output the sum that you generated up to the previous row each time you process a row with a "1" in the Flag column.
B) Within each group sort the Flag column in ascending order. Output the sum each time you process the row with a "1" in the Flag column.
C) Output the sum that you generated up to the previous row each time you process a row with a "1" in the Flag column. Use the LastRow() function to determine when the last group is done.
D) Output a running total for each group for each row. Follow the Transformer stage by an Aggregator stage. Take the MAX of the QTY column for each group.
E) Output the sum that you generated each time you process a row for which the LastRow() function returns True.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: C | Question # 3 Answer: C,E | Question # 4 Answer: B | Question # 5 Answer: B,C,D |
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