IBM A2090-421

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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

Question 1

You are responsible for deploying objects into your customers production environment. To ensure the stability of the production system the customer does not permit compilers on production machines. They have also protected the project and only development machines have the required compiler. What two options will allow jobs with a parallel transformer to execute in the customers production machines? (Choose two.)

A. Export the jobs with Information Server Manager with the executables.
B. Set $APT_COPY_TRANSFORM_OPERATOR
C. Add $APT_COMPILE_OPT=-portable
D. Create a package with Information Server Manager and select the option to include executables.

Question 2

A customer must compare a date column with a job parameter date to determine which output links the row belongs on. What stage should be used for this requirement?

A. Compare stage
B. Transformer stage
C. Filter stage
D. Switch stage

Question 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 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. Select all rows using the ODBC Connector stage, use a Sort Aggregator on customer number key to select the maximum order date.
D. Using the Dynamic Relational stage, use custom SQL to select all DISTINCT customer numbers from the order history table.

Question 4

Which three statements are true about stage variables in a Transformer Stage? (Choose three.)

A. A stage variable in one Transformer can refer to a stage variable in another Transformer, as long as the second Transformer was processed earlier in the job flow.
B. Stage variables are refreshed with default values before each new input row is processed.
C. Varchar stage variables can be initialized with spaces.
D. The expression executed for a stage variable can refer to a stage variable which is executed later.
E. Stage variables can be set to NULL.

Question 5

Which of the following describes what happens when Runtime Column Propagation is enabled?

A. An input column value flows into a target column based on its position in a Schema file.
B. An input column value flows into a target column only if it is explicitly mapped to it.
C. An input column value flows into a target column based on its position in the input row. For example, first column in the input row goes into the first target column.
D. An input column value flows into a target column only if it matches it by name.

Solutions: