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IBM InfoSphere DataStage v8.5 Sample Questions:
1. The result of a performance review for one of your job designs indicated this job needs to be split into two separate jobs. You also have been given the requirement to ensure you maintain parallelism (no re-partitioning) between these two new jobs.
Which single stage should you consider to accomplish maintaining parallelism and not introduce re-partitioning between these related jobs?
A) Data Set stage
B) Copy stage
C) Sequential File stage
D) Named Pipe stage
2. A customer is complaining of poor performance from the job shown in the exhibit, which aggregates and joins on ZIP code. Currently all partitioning is set to "Auto" and sort/partition insertion is allowed.
What would give the best performance improvement for the job?
A) Hash partition and sort on ZIP code on the input links to the Aggregator and Join stages.
B) Use same partitioning on all input links in the job; create the input data set by hash-partitioning its input on ZIP code.
C) Hash partition and sort on ZIP code prior to the Copy stage and use entire partitioning on the output of the Aggregator stage.
D) Hash partition and sort on ZIP code prior to the Copy stage, and use same partitioning on the Aggregator and Join stages.
3. Which three data types can the ODBC Enterprise stage handle? (Choose three.)
A) SQL_VARBINARY
B) SQL_SMALLDATETIME
C) SQL_TIMESTAMP
D) SQL_BIGINT
E) SQL_CLOB
4. There is a requirement to load mainframe data with array columns having redefined fields into a flat file. How can the Complex Flat File
A) Select the Records ID tab on the Stage page. Select a record from the Records list. Select the column(s) with the redefine from the Column list. Within CFF, use the Complex File Load Option window with "Flatten selective arrays" option selected.
B) Within CFF, use the Complex File Load Option window with "Flatten all arrays" option selected. CFF will handle flattening automatically.
C) CFF does not support flattening for redefined fields.
D) Within CFF, use the Complex File Load Option window with "Flatten selective arrays" option selected. Select the array with redefine column(s) and click redefine check box option.
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) 19
B) 9
C) 16
D) 12
Solutions:
Question # 1 Answer: C | Question # 2 Answer: D | Question # 3 Answer: A,C,D | Question # 4 Answer: A,D | Question # 5 Answer: B |