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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. 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 Ordered 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 SortMerge collector method for the input link of the final Sequential File stage.

2. You are setting up the parallel engine configuration file. Which two statements are true about file system efficiency? (Select two)

A) Using multiple scratch spaces in a logical node improves performance.
B) Specify a directory for the resource disk in the partition where the engine is installed.
C) In a clustered environment where NAS is used for a common storage, specify the internal disk for scratch disk.
D) Creating scratch disk space on an internal disk improves sort performance than NFS drive.

3. What two stages are required to place Header and Detail records, which have different formats, into a single format? (Choose two.)

A) Column Export Stage
B) Funnel Stage
C) Column Import Stage
D) Combine Stage

4. 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) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
B) Break the input file into multiple files.
C) Replace the Join with a Merge stage.
D) Alter the number of partitions in the $APT_CONFIG_FILE.

5. You have a dataset hash-partitioned and sorted on CustID. You need to create a Sequential File sorted on CustID from this dataset. Which technique is the most appropriate?

A) Use SortMerge collector for the Sequential File input link.
B) Use Copy stage.
C) Insert Sort stage before the final Sequential File stage and use Ordered collector for the Sequential File stage input link.
D) Insert Sort stage before the final Sequential File stage and use Round Robin collector for the Sequential File stage input link.

Solutions: