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IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. Rows of data going into a Transformer stage are sorted and hash partitioned by the Input.Product column. Using stage variables, how can you determine when a new row is the first of a new group of Product rows?

A) Create a stage variable named sv_IsNewProduct and follow it by a second stage variable
named sv_Product. Map the Input.Product column to
sv_Product. The derivation for sv_IsNewProduct is: IF Input.Product <> sv_Product THEN "YES"
ELSE "NO".
B) Create a stage variable named sv_Product and follow it by a second stage variable named
sv_IsNewProduct . Map the Input.Product column to
sv_Product. The derivation for sv_IsNewProduct is: IF Input.Product = sv_Product THEN "YES"
ELSE "NO".
C) Create a stage variable named sv_Product and follow it by a second stage variable named
sv_IsNewProduct . Map the Input.Product column to
sv_Product. The derivation for sv_IsNewProduct is: IF Input.Product <> sv_Product THEN "YES"
ELSE "NO".
D) Create a stage variable named sv_IsNewProduct and follow it by a second stage variable
named sv_Product. Map the Input.Product column to
sv_Product. The derivation for sv_IsNewProduct is: IF Input.Product = sv_Product THEN "YES"
ELSE "NO".

2. A script invokes an update job called "UpdateKeys" via a command line invocation of the dsjob command. The service is to wait for the completion and status of this job before continuing with the rest its tasks. Which three commands would invoke the "UpdateKeys" job in the MigrationProject and wait for its completion status? (Select three)

A) dsjob-run-userstatus MigrationProject UpdateKeys
B) dsjob -run -jobstatus MigrationProject UpdateKeys
C) dsjob -run -log dsjob -run -userstatus MigrationProject UpdateKeys
D) dsjob -run MigrationProject UpdateKeys
E) dsjob-run-wait MigrationProject UpdateKeys

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

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

4. Configuring the weighting column of an Aggregator stage affects which three options. (Choose three.)

A) Sum
B) Sum of Weights
C) Corrected Sum of Squares
D) Percent Coefficient of Variation
E) Maximum Value

5. A job validates credit card numbers with a reference file using a Join stage, which is hash partitioned by card number. Examination of Job Monitor reveals that some partitions process many more rows than others. Assuming adequate hardware resources, which action can be used to improve the performance of the job?

A) Use Round Robin partitioning on the stream and Entire partitioning on the reference.
B) Break the input file into multiple files.
C) Replace the Join with a Merge stage.
D) Alter the number of partitions in the $APT_CONFIG_FILE.

Solutions: