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IBM Assessment: IBM InfoSphere DataStage v9.1 Assessment Sample Questions:

1. The derivation for a stage variable is: Upcase(input_column1) : ' ' : Upcase(input_column2). Suppose that input_column1 contains a NULL value. Assume the legacy NULL processing option is turned off. Which behavior is expected?

A) NULL is written to the target stage variable.
B) The target stage variable is populated with spaces or zeros depending on the stage variable data type.
C) The job aborts.
D) The input row is either dropped or rejected depending on whether the Transformer has a reject link.

2. Which step is required to change from a normal lookup to a sparse lookup in an ODBC Connector stage?

A) Change the lookup option in the stage properties to "Sparse".
B) Change the partitioning to hash.
C) Replace columns at the beginning of a SELECT statement with a wildcard asterisk (*).
D) Sort the data on the reference link.

3. Which statement describes what happens when Runtime Column Propagation is disabled for a parallel job?

A) An input column value flows into a target column only if it is explicitly mapped to it.
B) 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.
C) An input column value flows into a target column only if it matches it by name.
D) You must set APT_AUTO_MAP project environment to true to allow output link mapping to occur.

4. How does the Complex Flat File stage (CFF) support the use of OCCURS clauses within COBOL files?

A) The CFF stage cannot process COBOL files with OCCURS clauses.
B) Each element of the OCCURS clause is treated as a separate element in an array.
C) Each element of the OCCURS clause is treated as a subrecord.
D) Each element of the OCCURS clause is treated as a column of raw data.

5. When using Runtime Column Propagation, which two stages require a schema file? (Choose two.)

A) Column Import stage
B) Pivot stage
C) DB2 Connector stage
D) Peek stage
E) Sequential File stage

Solutions:

Question # 1 Answer: A

Question # 2 Answer: A

Question # 3 Answer: A

Question # 4 Answer: B

Question # 5 Answer: A,E