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IBM C2090-421 Exam Syllabus Topics:

IBM InfoSphere DataStage v8.5 Sample Questions:

Question 1

Which statement is true about buffering?

A. In a clustered environment, using a disk space on an NFS mount for buffering improves performance.
B. The framework uses /tmp by default for buffering on Unix systems.
C. The buffer operator uses both memory and disk storage.
D. The "buffer" scratch disk pool needs to be defined to allow the framework to perform data buffering.

Question 2

A DataStage job uses an Inner Join to combine data from two source parallel datasets that were written to disk in sort order based on the join key columns. Which two methods could be used to dramatically improve performance of this job? (Choose two.)

A. Set the environment variable $APT_SORT_INSERTION_CHECK_ONLY.
B. Disable job monitoring.
C. Add a parallel sort stage before each Join input, specifying the "Don't Sort, Previously Grouped" sort key mode for each key.
D. Unset the Preserve Partitioning flag on the output of each parallel dataset.
E. Explicitly specify hash partitioning and sorting on each input to the Join stage.

Question 3

You are experiencing performance issues for a given job. You are assigned the task of understanding what is happening at run time for that job. What are the first two steps you should take to understand the job performance issues? (Choose two.)

A. Run job with $APT_DUMP_SCORE set to true.
B. Run job with $APT_TRACE_RUN set to true.
C. Review the objectives of the job.
D. Replace Transformer stages with custom operators.

Question 4

A customer requests you to configure a Sequential File stage in a clustered environment. The stage must read a varying number of files each run in a single pass and append the name of the file the row was read from when an error occurs. What three steps are required to achieve this? (Select three)

A. Specify multiple "File" properties.
B. Specify a file pattern option along with a file name mask that captures entire file list.
C. Specify File Name Column property.
D. Set environment variable $APT_IMPORT_PATTERN_USES_FILESET.
E. Set environment variable $APT_SEQ_FILE_INCL_FILENAMES.

Question 5

You would like to invoke a job sequence from a web service. How can this be done?

A. Invoke the job sequence using the dsjob command.
B. Check the use job sequence checkbox when creating the web service.
C. Select the job sequence when creating the web service operation,
D. Create a DataStage routine that invokes the job sequence and invoke the routine from a DataStage job. Then use this job when creating the web service operation.

Solutions: