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IBM Websphere Datastage V.8.0 Sample Questions:

1. You are working on a job in which a sequential file cannot be read in parallel. In an attempt to improve job performance, you first define a single large string column for the non-parallel sequential file read. Which stage may be used to parse the large string in parallel?

A) The Column Export stage
B) The Split Vector stage
C) The Column Import stage
D) The Make Vector stage

2. You have created a parallel job in which there are several stages that you want to be able to reuse in other jobs. You decided to create a parallel shared container from these stages. Identify two things that are true about this shared container. (Choose two.)

A) It can be used in sequencer jobs.
B) It can take advantage of Run Time Column Propagation (RCP).
C) It can be used in Transformer stage derivations.
D) It can have job parameters to resolve stage property values.

3. What are three valid data types for "Calculation" Aggregation type in the Aggregator stage? (Choose three.)

A) Integer
B) Varchar
C) Char
D) Date
E) Decimal

4. A job reads from a sequential file using a Sequential File stage with option "number of
readers" set to "2". This data goes to a Transformer stage and then is written to a Data Set using the Data Set stage. The default configuration file has three nodes. The environment variable $APT_DISABLE_COMBINATION is set to "True" and partitioning is set to "Auto". How many processes are created?

A) 7
B) 5
C) 9
D) 12

5. A job validates credit card numbers with a reference file using a Join stage and 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 two actions can be used to improve the performance of the job? (Choose two.)

A) Add an additional column to the hash keys.
B) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
C) Break the input file into multiple files.
D) Alter the number of partitions in the $APT_CONFIG_FILE.

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