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IBM Websphere Datastage V.8.0 Sample Questions:

1. Click the Exhibit button.
Based on the dump score fragment provided in the exhibit, which two operators were added by the Parallel Framework during runtime to satisfy the Join stage execution requirements? (Choose two.)

A) APT_JoinSubOperatorNC
B) Buffer
C) Tsort
D) APT_RealFileExportOperator

2. Which two steps are required to change from a normal lookup to a sparse lookup in an ODBC Enterprise stage? (Choose two.)

A) Replace columns at the beginning of a SELECT statement with a wildcard asterisk (*).
B) Sort the data on the reference link.
C) Establish a relationship between the key field column in the source stage with the database table field.
D) Change the lookup option in the stage properties to "Sparse".

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

4. You are assigned to write a job that splits a single Data Set into three Data Sets based on character values on the input record. Normally you would use a transformer link constraint to achieve this but you discover that the condition for each output link is supplied at runtime. Which stage would allow you to parameterize the entire condition for splitting the input data set?

A) Filter
B) Split Vector
C) Modify
D) Match Frequency

5. Which three actions can improve sort performance in a DataStage job? (Choose three.)

A) Use the stable-sort option to avoid the random ordering of non-key data.
B) Minimize the number of sorts used within a job flow.
C) Specify only the key columns which are necessary.
D) Run the job sequentially so that only one sort process is invoked.
E) Adjusting the "Restrict Memory Usage" option in the Sort stage.

Solutions: