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IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. In a Transformer expression for a stage variable, there is a nullable input column. What happens when a row is processed that contains NULL in that input column?

A) The job aborts.
B) The row is rejected.
C) NULL is written to the stage variable.
D) The value written to the stage variable is undetermined.

2. Input rows to a Transformer contain a product name field and a field with a list of colors the product can be ordered with. The colors are separated by the pipe character (|). Here is an example of an input row: "Shirt"| ....| "Red, Blue, Black"|... For each input row, you want to output multiple output rows, one for each color in the list. For the above example input row, three rows are to be output, one per color: "Shirt" ... "Red", "Shirt" ... "Blue", "Shirt" ... "Black".
Which three operations will you need to accomplish this? (Choose three.)

A) Use the SaveInputRecord() to save the input row for processing in the loop. Use the GetInputRecord() to extract the row for each iteration of the loop.
B) Specify the following loop condition: @ITERATION <= n, where n is a stage variable initialized with number of loop iterations.
C) Use the LastRowInGroup() function to determine when the last color in the color list has been processed.
D) Use the @ITERATION variable to determine which color in the ColorList field to extract using the Field function.
E) Use the Count() function over the ColorList field to determine the number of loop iterations.

3. Which statement is true about buffering?

A) In a clustered environment, using a disk space on an NFS mount for buffering improves performance.
B) The buffer operator uses both memory and disk storage.
C) The "buffer" scratch disk pool needs to be defined to allow the framework to perform data buffering.
D) The framework uses /tmp by default for buffering on Unix systems.

4. Which two statements are accurate regarding usage of database stages? (Choose two.)

A) Database stages cannot create tables and must be done externally.
B) Plug-in stages match columns by name.
C) DataStage provides native Oracle database stages.
D) Native database stages match columns by name.

5. Which two tasks can the Slowly Changing Dimensions (SCD) stage perform? (Choose two.)

A) Look up whether a record with a matching business key value exists in a dimension table. If it does, mark the record as not-current, and generate a new record with new values for selected fields.
B) Look up whether a record with a matching business key value exists in a dimension table. If it does, add new values for selected fields to values lists for those fields.
C) Look up whether a record with a matching business key value exists in a dimension table. If it does not, retrieve a new surrogate key value and insert a new row into the dimension table.
D) Look up whether a record with a matching business key value exists in a fact table. If it does not, retrieve a new surrogate key value and insert a new row into the fact table.

Solutions: