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Code d'Examen: 000-415
Nom d'Examen: IBM (IBM WebSphere IIS DataStage Enterprise Edition v7.5)
Questions et réponses: 158 Q&As
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NO.1 Click the Task button. You have been asked to improve the performance of a job. A consultant
has convinced your manager that sorts and partitions are major contributors to the performance
issues being experienced since they are specified as "auto". Both the aggregation and join are
done on Zip (postal) code. Place the appropriate sort/aggregation specifications on the links.
Correct:
Green choice2---->Yellow Choice1
Green choice1---->Yellow Choice2
Green choice3---->Yellow Choice3
Green choice4---->Yellow Choice4
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NO.2 A customer is interested in selecting the right RDBMS environment to run DataStage
Enterprise Edition to solve a multi-file and relational database data merge. The customer realizes
the value of running in parallel and is interested in knowing which RDBMS stage will match the
internal data partitioning of a given RDBMS. Which RDBMS stage will satisfy the customer's
request?
A.ODBC Enterprise
B.Oracle Enterprise
C.Sybase Enterprise
D.DB2/UDB Enterprise
Correct:D
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NO.3 Which two statements about performance tuning a DataStage EE environment are true?
(Choose two.)
A.Overall job design has a minimal impact in actual real-world performance.
B.Only adjust buffer tuning parameters after examining other performance factors.
C.A single, optimized configuration file will yield best performance for all jobs and be easier to administer.
D.Performance tuning is an iterative process - adjust one item at a time and examine the results in
isolation.
Correct:B D
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NO.4 Which two statements are true of the column data types used in Orchestrate schemas? (Choose
two.)
A.Examples of Orchestrate schema column data types are varchar and integer.
B.Examples of Orchestrate schema column data types are int32 and string [max=30].
C.Orchestrate schema column data types are the same as those used in DataStage stages.
D.OSH import operators are needed to convert data read from sequential files into schema types.
Correct:B D
certification IBM 000-415 000-415 000-415 examen
NO.5 In which two scenarios should a sparse lookup be used in place of a normal lookup to retrieve
data from an Oracle database? (Choose two.)
A.When the Oracle database is on the same system as the DataStage server.
B.When the number of input rows is significantly larger than the number of rows in the lookup table.
C.When the number of input rows is significantly smaller than the number of rows in the lookup table.
D.A database function that returns the current value of an Oracle object is required as part of the result set.
Correct:C D
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NO.6 An XML file is being processed by the XML Input stage. How can repetition elements be
identified on the stage?
A.Set the "Key" property for the column on the output link to "Yes".
B.Check the "Repetition Element Required" box on the output link tab.
C.Set the "Nullable" property for the column on the output link to "Yes".
D.No special settings are required. XML Input stage automatically detects the repetition element from the
XPath expression.
Correct:A
certification IBM 000-415 000-415 000-415 examen
NO.7 Which statement is true about Aggregator Sort and Hash methods when the
APT_NO_SORT_INSERTION environment variable is set to TRUE?
A.If you select the Hash method, the Aggregator stage requires the data to have the partition sorted by
the group key.
B.If you select the Sort method, the Aggregator stage requires the data to have been partition sorted by
the group key.
C.If you select the Sort method, the Aggregator stage will partition sort the data by the group key before
performing the aggregation.
D.If you select the Hash method, the Aggregator stage will partition sort the data by the group key before
building a hash table in memory.
Correct:B
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NO.8 Which three are valid ways within a Job Sequence to pass parameters to Activity stages?
(Choose three.)
A.Routine Activity stage
B.Sequencer Activity stage
C.UserVariables Activity stage
D.ExecCommand Activity stage
E.Nested Condition Activity stage
Correct:A C D
certification IBM 000-415 000-415 000-415 examen
NO.9 Which two tasks will create DataStage projects? (Choose two.)
A.Install the DataStage engine.
B.Copy a project in DataStage Administrator.
C.Add new projects from DataStage Administrator.
D.Export and import a DataStage project from DataStage Manager.
Correct:A C
certification IBM 000-415 000-415 000-415 examen
NO.10 Which statement about job parameter usage is true?
A.You can use environment variables to set parameter values linked to the Job Sequence.
B.You can change the parameter values in an initialization file linked to a Job Sequence .ini file.
C.Changes to the job parameters in the Designer do not require a recompile to be applied to the job.
D.You can change job parameters while a job is running and the changes will immediately be applied
mid-job.
Correct:A
certification IBM 000-415 000-415 000-415 examen
NO.11 Which command can be used to execute DataStage jobs from a UNIX shell script?
A.osh
B.dsjob
C.DSRunJob
D.DSExecute
Correct:B
certification IBM 000-415 000-415 000-415 examen
NO.12 A job has two input sources that need to be combined. Each input source exceeds available
physical memory. The files are in the same format and must be combined using a key value. It is
guaranteed that there will be at least one match. Given the above scenario, which stage would
consume the least amount of physical memory?
A.Merge
B.Funnel
C.Lookup
D.Transformer
Correct:A
certification IBM 000-415 000-415 000-415 examen
NO.13 The last two steps of a job are an Aggregator stage using the Hash method and a Sequential File
stage with a Collector type of Auto that creates a comma delimited output file for use by a
common spreadsheet program. The job runs a long time because data volumes have increased.
Which two changes would improve performance? (Choose two.)
A.Change the Sequential stage to use a Sort Merge collector on the aggregation keys.
B.Change the Sequential stage to a Data Set stage to allow the write to occur in parallel.
C.Change the Aggregator stage to use the sort method. Hash and sort on the aggregation keys.
D.Change the Aggregator stage to a Transformer stage and use stage variables to accumulate the
aggregations.
Correct:A C
certification IBM 000-415 000-415 000-415 examen
NO.14 Job run details for a specific invocation of a multi-instance job can be viewed by which two
clients? (Choose two.)
A.dsjob
B.dsjobinfo
C.DataStage Director
D.DataStage Manager
Correct:A C
certification IBM 000-415 000-415 000-415 examen
NO.15 Which two can be implemented in a Job Sequence using job parameters? (Choose two.)
A.All options of the Start Loop Activity stage.
B.Name of a job to be executed by a Job Activity stage.
C.A command to be executed by a Routine Activity stage.
D.The body of the email notification activity using the user interface.
Correct:A C
certification IBM 000-415 000-415 000-415 examen
NO.16 Which statement describes a process for capturing a COBOL copybook from a z/OS system?
A.Select the COBOL copybook using the Browse button and capture the COBOL copybook with Manager.
B.FTP the COBOL copybook to the client workstation in binary and capture the metadata through
Manager.
C.FTP the COBOL copybook to the client workstation in text mode and capture the copybook with
Manager.
D.FTP the COBOL copybook to the server platform in text mode and capture the metadata through
Manager.
Correct:C
certification IBM 000-415 000-415 000-415 examen
NO.17 Establishing a consistent naming standard for link names is useful in which two ways?
(Choose two.)
A.using less memory at job runtime
B.specifying link order without having to specify stage properties to generate correct results
C.improving developer productivity and quality by distinguishing link names within stage editors
D.easing use of captured job statistics (eg. row counts in an XML file) by processes or users outside of
DataStage
Correct:C D
certification IBM 000-415 000-415 000-415 examen
NO.18 What is the purpose of the uv command in a UNIX DataStage server?
A.Start and stop the DataStage engine.
B.Report DataStage client connections.
C.Cleanup resources from a failed DataStage job.
D.Provide read access to a DataStage EE configuration file.
Correct:A
certification IBM 000-415 000-415 000-415 examen
NO.19 Which three are valid trigger expressions in a stage in a Job Sequence? (Choose three.)
A.Unconditional
B.Equality(Conditional)
C.Custom(Conditional)
D.Difference(Conditional)
E.ReturnValue(Conditional)
Correct:A C E
certification IBM 000-415 000-415 000-415 examen
NO.20 How does a Join stage process an Inner join?
A.It transfers records from the input data sets whose key columns contain equal values to the output data
set.
B.It transfers all values from the left data set but transfers values from the right data set and intermediate
data sets only when key columns match.
C.It transfers all values from the right data set and transfers values from the left data set and intermediate
data sets only where key columns match.
D.It transfers records in which the contents of the key columns are equal from the left and right input data
sets to the output data set. It also transfers records whose key columns contain unequal values from both
input data sets to the output data set.
Correct:A
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