IBM C2090-421

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IBM InfoSphere DataStage v8.5 Sample Questions:

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

2. Which three of the following options does the dsjob command have? (Choose three.)

A) Listing projects, jobs, stages, links, and parameters
B) Setting an alias for a job
C) Specifying an appropriate log file
D) Stopping a job

3. Which two tasks can the Slowly Changing Dimensions (SCD) stage perform? (Choose two.)

A) Look up whether a record with a matching business key value exists in a dimension table. If it does, mark the record as not-current, and generate a new record with new values for selected fields.
B) Look up whether a record with a matching business key value exists in a fact table. If it does not, retrieve a new surrogate key value and insert a new row into the fact table.
C) Look up whether a record with a matching business key value exists in a dimension table. If it does not, retrieve a new surrogate key value and insert a new row into the dimension table.
D) Look up whether a record with a matching business key value exists in a dimension table. If it does, add new values for selected fields to values lists for those fields.

4. Which two properties can be set to read a fixed width sequential file in parallel? (Choose two.)

A) Set the Execution mode to "Parallel".
B) Set Read Method to "File Pattern".
C) Set the "Read from Multiple Nodes" optional property to a value greater than 1.
D) Set the "Number of Readers Per Node" optional property to a value greater than 1.

5. Which two statements are true about project-level configuration for National Language Support (NLS)? (Select two)

A) Choose appropriate NLS map in the stage property.
B) Choose NVarChar for string fields.
C) Change the Parallel job project locale.
D) Change the Parallel job project map.

Solutions: