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IBM Websphere Datastage V.8.0 Sample Questions:

1. A customer wants to select the entire order details for the largest transaction for each of 2 million unique customers from a 20 million row DB2 source table containing order history. Which parallel job design would satisfy this functional requirement?

A) Partition and Sort the input to a Remove Duplicates stage using the customer key and transaction amount columns. Remove duplicates on customer key.
B) Partition and Sort the input to a Filter stage by customer number. Filter with the clause "MAX(transaction_amount)".
C) Partition on customer key, sort on customer key and transaction amount, Remove duplicates on customer key.
D) Use a Sort Aggregator stage with a calculated column based on the maximum value of the transaction amount column.

2. A credit card company has about 10 million unique accounts. The company needs to determine the outstanding balance of each account (Account_id) by aggregating the previous balance with current charges. A multi-node DataStage job with an Aggregator stage is being used to perform this calculation. Which three tasks are required for optimal performance? (Choose three.)

A) Use "Sort" Aggregator method.
B) Sort data on Account_id going into the Aggregator stage.
C) Use "Hash" partition on Account_id going into the Aggregator stage.
D) Use "Round Robin" partition on Account_id for even distribution of records.
E) Use "Hash" Aggregator method.

3. Which two statements describe both File Sets and Data Sets? (Choose two.)

A) File and Data Sets contain header file and data files.
B) File and Data Sets are readable by external applications.
C) File and Data Sets preserve partitioning.
D) File and Data Sets are stored in internal format.

4. You are assigned to write a job which reads a sequential file, applies business logic, and writes the results to one or more flat-files. However, the number and names of the input columns may vary from one input file to the next. You are guaranteed that a core set of columns required to perform the business logic will always be present, though not necessarily in the same place on the input record. Which two features would you use to build this job? (Choose two.)

A) Data Set
B) Schema File
C) Runtime Column Propagation
D) $APT_EXPORT_INCLUDE_SCHEMA

5. 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) Split Vector
B) Modify
C) Filter
D) Match Frequency

Solutions: