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IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. Which Oracle data type conversion is correct?

A) Oracle data type NUMBER(15, 0) converts to INT32 in Oracle Enterprise stage.
B) Oracle data type NUMBER(6, 0) converts to INT32 in Oracle Enterprise.
C) Oracle data type NUMBER converts to DECIMAL(38, 0) in Oracle Enterprise stage.
D) Oracle data type RAW converts to RAW in Oracle Enterprise stage.

2. A job validates credit card numbers with a reference file using a Join stage, which is hash partitioned by card number. Examination of Job Monitor 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) Break the input file into multiple files.
B) Alter the number of partitions in the $APT_CONFIG_FILE.
C) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
D) Replace the Join with a Merge stage.

3. Which two statements are true about the usage of scratch disk? (Choose two.)

A) You can define multiple scratch disk spaces to distribute disk I/O.
B) The Sort stage always uses the scratch disk.
C) If "buffer" scratch disk pool is defined, the framework uses this disk pool and the default disk pool.
D) The parallel framework uses the disk space specified in the scratch disk setting to buffer virtual data set records.

4. You have a dataset that is range-partitioned and sorted. Which technique is most efficient to create globally sorted data file?

A) Insert Funnel stage before the final Sequential File stage and select Sort Funnel as Funnel Type.
B) Select SortMerge collector method for the input link of the final Sequential File stage.
C) Insert Funnel stage before the final Sequential File stage and select Sequence as Funnel Type.
D) Select Ordered collector method for the input link of the final Sequential File stage.

5. You have a DataStage job on SMP environment. It contains an input sequential file, a Modify stage, followed by a Transformer stage, and an output Sequential File stage. The job is run with three nodes. The engine uses all default settings. How many processes will this job create?

A) 12
B) 16
C) 9
D) 19

Solutions: