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IBM C2090-421 Exam Syllabus Topics:

IBM InfoSphere DataStage v8.5 Sample Questions:

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

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

2. What are the three features of Information Server that allow you to deploy DataStage objects? (Select three)

A) istool
B) Information Server Manager
C) dscc.exe
D) $APT_COPY_TRANSFORMER
E) Designer Client Export

3. When using Runtime Column Propagation, which three stages require a schema file? (Select three)

A) File Set stage
B) Peek stage
C) DB2 Enterprise stage
D) Sequential File stage
E) Column Import stage

4. In the job fragment shown in the exhibit, the data going into the target Sequential File stage needs to be sorted by postal code. The Sort stage accomplishes this by running in Sequential mode and sorting by postal code. You have been asked to improve the performance of the job with a 4-node configuration file.

Which two changes will improve the performance of the job? (Choose two.)

A) Add a second Sort stage just before the existing Sort stage; run the new stage in parallel mode sorting by postal code.
B) Eliminate the existing Sort stage; define an in-stage sort in the Filter stage, sorting by postal code. In the target Sequential File stage choose the SortMerge collector.
C) Move the Sort stage in front of the Filter stage, so that the sort is performed earlier in the job.
D) Change the mode of the existing Sort stage to parallel mode; continue to sort by postal code. In the target Sequential File stage choose the SortMerge collector.

5. What is the correct method to process a file containing multiple record types using a Complex Flat File stage?

A) Define record ID constraints on the Records ID tab of the Complex Flat File stage.
B) Define record definitions on the Constraints tab of the Complex Flat File stage.
C) Use a Modify stage to convert the output array from the Complex Flat File to a subrecord.
D) Manually break the file into multiple files by record type.

Solutions: