Exam Name: InfoSphere DataStage v8.5
Certification Provider: IBM
Corresponding Certification: IBM Specialist
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IBM C2090-421 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| DataStage Architecture and Components | - InfoSphere DataStage architecture overview
|
| Job Design and Development | - Server jobs and parallel jobs design
|
| Performance Tuning and Optimization | - Parallel processing optimization
|
| Administration and Troubleshooting | - Monitoring and debugging jobs
|
| Data Integration and Connectivity | - Data sources and connectors
|
IBM InfoSphere DataStage v8.5 Sample Questions:
You have a DataStage job on SMP environment. It contains an input sequential file, a Modify stage, followed by a Transformer stage, and an output Sequential File stage. The job is run with three nodes. The engine uses all default settings. How many processes will this job create?
- A. 12
- B. 16
- C. 19
- D. 9
Correct Answer: D 🗳️
Which two partitioning methods require keys? (Choose two.)
- A. Entire
- B. Hash
- C. Round Robin
- D. Modulus
Correct Answer: B,D 🗳️
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. 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.
- C. Output the sum that you generated each time you process a row for which the LastRow() function returns True.
- D. 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.
- E. 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.
Correct Answer: B,D,E 🗳️
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. Use the @ITERATION variable to determine which color in the ColorList field to extract using the Field function.
- D. 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.
- E. Specify the following loop condition: @ITERATION <= n, where n is a stage variable initialized with number of loop iterations.
Correct Answer: A,C,E 🗳️
A job needs to split a single Data Set into three Data Sets based on conditions that are supplied at runtime. Which stage would allow you to parameterize the conditions for splitting the input data set?
- A. Transformer stage
- B. Filter stage
- C. Switch stage
- D. Split Vector stage
Correct Answer: B 🗳️
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