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

1. Which two statements about using a Load write method in an Oracle Connector stage to tables that have indexes on them are true? (Choose two.)

A) Set the Index mode property to "Bypass".
B) Set the environment variable APT_ORACLE_LOAD_OPTIONS to "OPTIONS (DIRECT=TRUE, PARALLEL=FALSE)".
C) Set the Upsert mode property to "Index".
D) The Load Write method uses the Parallel Direct Path load method.
E) The Load Write method uses "Rebuild" mode with no logging automatically.

2. 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.

3. A job validates account numbers with a reference file using a Join stage, which is hash partitioned by account number. Runtime monitoring reveals that some partitions process many more rows than others. Assuming adequate hardware resources, which action can be used to improve the performance of the job?

A) Change the number of nodes in the configuration file.
B) Add a Sort stage in front of the Join stage. Sort by account number.
C) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
D) Replace the Join with a Merge stage.

4. Which two pieces of information are required to be specified for the input link on a Netezza Connector stage? (Choose two.)

A) Table definitions
B) Buffering settings
C) Partitioning
D) Error log directory
E) Server name

5. What two project environment variables can be considered in your parallel jobs to support your optimization strategy of partitioning and sorting? (Choose two.)

A) $APT_PARTITION_FLUSH_COUNT
B) $APT_NO_PART_INSERTION
C) $APT_OPT_SORT_INSERTION
D) $APT_TSORT_STRESS_BLOCKSIZE
E) $APT_RESTRICT_SORT_USAGE

Solutions: