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IBM C2090-421 Exam Syllabus Topics:

IBM InfoSphere DataStage v8.5 Sample Questions:

1. Which of the following describes a type two update in a Slowly Changing Dimensions (SCD) stage?

A) An update the retains the existing column value in an historical row and creates a new row with the new value.
B) An update that retains the existing column value in a list and adds the new value to the list.
C) An update that overwrites the existing column value.
D) An update that replaces the existing column value if a specified condition is satisfied.

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

A) 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.
B) Select the job sequence when creating the web service operation,
C) Invoke the job sequence using the dsjob command.
D) Check the use job sequence checkbox when creating the web service.

3. Which two statements are correct when referring to an Aggregator Stage? (Choose two.)

A) Use Hash method with a large number of distinct key-column values
B) Use Sort method for a limited number of distinct key values
C) Use Hash method for a limited number of distinct key values
D) Use Sort method with a large number of distinct key-column values

4. Refer to the exhibit.

You submit a job from DataStage Director and then log onto your DataStage Linux server to issue the command "ps-ef | grepds" and receive the following screen:
Which process is the section leader for node2?

A) 7219
B) 7216
C) 7221
D) 7220

5. Which of the following describes what happens when Runtime Column Propagation is enabled?

A) An input column value flows into a target column based on its position in the input row. For example, first column in the input row goes into the first target column.
B) An input column value flows into a target column based on its position in a Schema file.
C) An input column value flows into a target column only if it matches it by name.
D) An input column value flows into a target column only if it is explicitly mapped to it.

Solutions: