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IBM InfoSphere DataStage v8.5 Sample Questions:

1. The DB2 and Oracle Enterprise stages support logged and non-logged DBMS table operations. What is the non-logged operation that is supported by the DB2 and Oracle Enterprise stages?

A) Update
B) Delete
C) Insert
D) Load

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

3. Records in a source file must be aggregated for further processing. Which two conditions would require the use of a Transformer stage instead of or in addition to an Aggregator stage? (Choose two.)

A) A global aggregation across all partitions is needed.
B) The data hasn't been sorted or grouped.
C) Aggregation results outside of a certain range need to be flagged as abnormal.
D) The aggregation is a custom formula for your enterprise.

4. A client has multiple servers connected with a high bandwidth switch and has installed DataStage on one of them. There are five files (with the same record layout) that must be retrieved from three other servers using FTP. Which approach will retrieve and process all five files in the minimal amount of time?

A) In a single job, use five separate FTP Enterprise stages with output links to a single Sort Funnel stage. Next, process the records without landing to disk.
B) Create a sequence containing five separate DataStage jobs which each retrieve a single file and append it to a common Data Set. Next, process the resulting Data Set in an sixth DataStage job.
C) Use a single FTP Enterprise stage and specify five URI properties (one for each file). Next, process the records without landing to disk.
D) In a single job, use three separate FTP Enterprise stages (one for each machine) with output links to a single Sort Funnel stage. Next, process the records without landing to disk.

5. In a Transformer Stage you have a nullable input column that is mapped to a non-nullable output column. What two techniques can be used to handle NULL values? (Choose two.)

A) NullToValue(input_column, 'unknown').
B) IF input_column = '' THEN 'unknown' ELSE input_column.
C) IF IsNULL(input_column) THEN 'unknown' ELSE input_column.
D) IF input_column = NULL THEN 'unknown' ELSE input_column.

Solutions: