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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. Click the Exhibit button.

The job in the exhibit runs to successful completion with no warnings. However, a validation test identifies that the CUSTOMER_MASTER table is empty. You suspect the cause to be related to the NEW_CUSTOMERS table or a defect in the job. Examining runtime meta-data will help you track down the problem. Which two product features will help you isolate the cause of the problem? (Choose two.)

A) Use job run operational meta-data reports from IS Manager.
B) Job Monitor Tool in the Director Client
C) Show Performance Statistics in the Designer.
D) $APT_PM_PLAYER_STATS

2. Your job sequence must be restartable. It runs Job1, Job2, and Job3 serially. It has been compiled with "Add checkpoints so sequence is restartable". Job1 must execute every run even after a failure. Which two properties must be selected to ensure that Job1 is run each time, even after a failure? (Choose two.)

A) Use the Nested Condition Activity with a trigger leading to Job1; set the trigger expression type to "Unconditional".
B) In the Job1 Activity stage set the Execution action to "Reset if required, then run.".
C) Set the Job1 Activity stage to "Do not checkpoint run.".
D) Set trigger on the Job1 Activity stage to "Unconditional".

3. Which two partitioning methods require keys? (Choose two.)

A) Round Robin
B) Modulus
C) Entire
D) Hash

4. A scenario requires selecting only the most recent transactions for each of 2 million unique customers, from a 20 million row DB2 source table containing order history. Which parallel job design would satisfy this functional requirement?

A) Using the DB2 API stage, select all rows. Use a Sort stage with customer number and order date sort keys in ascending order, then Remove Duplicates with Last Duplicate to retain.
B) Using the DB2 Enterprise stage, select all rows. Perform a unique Sort using customer number and order date sort keys in ascending order.
C) Using the Dynamic Relational stage, use custom SQL to select all DISTINCT customer numbers from the order history table.
D) Select all rows using the ODBC Connector stage, use a Sort Aggregator on customer number key to select the maximum order date.

5. What is the correct restructure stage to extract data from four input columns (three of which carry vectors) and output them into two columns with one vectors in a subrecord and the non-vector carrying column being passed through the stage?

A) Make Subrecord Stage
B) Column Export Stage
C) Column Import Stage
D) Split Subrecord Stage

Solutions: