Exam Name: InfoSphere DataStage v8.5
Certification Provider: IBM
Corresponding Certification: IBM Specialist
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InfoSphere DataStage v8.5: C2090-421 Exam Premium File as PDF & Test Engine
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IBM InfoSphere DataStage v8.5 Sample Questions:
1. You have a job that reads in Sequential File followed by a Transformer stage. When you run this job, which partitioning method will be used by default?
A) Same
B) Random
C) Round Robin
D) Hash
2. You are responsible for the projects Source Code Repository. When a developer notifies you that changes are ready to deploy you must first check them in. You will use the Information Server Source Code integration features to check in the changed assets. How will you identify the DataStage assets the developer modified in order to send them to the workspace?
A) From the workspace perspective select the project Right-click then Refresh from repository, specify a modification date and the developer's username in the Modified by fields.
B) From the Information Server Manager Select the project then right-click on Synchronize with source code control system.
C) From Information Server Manager use Search with advanced options, specify a date modified and the developer's user name in the Modified by fields.
D) Use Designer client Advanced Find, specify a modification date and the developer's username in the Modified by fields.
3. The given job processes large volumes of data using default partitioning, with sort/partition insertion enabled. Both source Data Sets are partitioned and sorted on the merge key. Assuming that the business logic allows all of the following actions, which design change would improve the performance of this job?
A) Set the buffer mode to "no buffer" on the output links of both Data Sets.
B) Set the "Preserve Partitioning" option on both Data Sets and replace the Merge stage with a Sort Funnel stage.
C) Use the Data Set Management Utility to combine both input Data Sets into a single source Data Set.
D) Before each input to the Merge stage, insert a Sort stage with "Don't Group, Previously Grouped" set on the merge key. Specify SAME partitioning on all inputs.
4. 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) Minimize the number of sorts used within a job flow.
C) Use the stable-sort option to avoid the random ordering of non-key data.
D) Adjust the "Restrict Memory Usage" option in the Sort stage.
E) Specify only the key columns which are necessary.
5. Which of the following describes a type two update in a Slowly Changing Dimensions (SCD) stage?
A) An update that overwrites the existing column value.
B) An update that retains the existing column value in a list and adds the new value to the list.
C) An update the retains the existing column value in an historical row and creates a new row with the new value.
D) An update that replaces the existing column value if a specified condition is satisfied.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: C | Question # 3 Answer: D | Question # 4 Answer: B,D,E | Question # 5 Answer: B |
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