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

2. A customer wants to select the entire order details for the largest transaction for each of 2 million customers from a 20 million row DB2 source table containing order history. Which parallel job design would satisfy this functional requirement?

A) Partition and sort the input to a Filter stage by customer number. Filter with the clause "MAX(transaction_amount)".
B) Partition on customer key, sort on customer key and transaction amount, remove duplicates on customer key.
C) Use a Sort Aggregator stage with calculated column based on the maximum value of transaction amount column.
D) Partition and sort the input to a RemoveDuplicates stage using the customer key and transaction amount columns. Remove duplicates on customer key.

3. 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 Enterprise stage, select all rows. Perform a unique Sort using customer number and order date sort keys in ascending order.
B) 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.
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.

4. You have been asked to delete a shared container from the project by your customer. Before you do this you want to make sure it will not impact other objects in the project. How will you ensure that deleting the shared container will not cause a failure when jobs are recompiled?

A) Select the shared container, Right-click on the Where used (deep) command.
B) Select the shared container, Right-click on the Where used command.
C) Advanced find, set Dependencies Of field equal to the container name, and Check the Option to Include nested results for Dependency searches.
D) Select the shared container, Right-click on the Dependencies (deep) command.

5. A star schema data warehouse consists of four dimension tables and one fact table. How many Slowly Changing Dimensions (SCD) stages will you need in your jobs to update the star schema tables?

A) four
B) five
C) two
D) three

Solutions: