IBM : C2090-421 Questions & Answers

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IBM C2090-421 Exam Syllabus Topics:

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) Round Robin
B) Hash
C) Random
D) Same

2. You are using the Change Capture stage in your job design to identify changes made to the input link (before image) to obtain the results in the output link. This job will be using a multi-node configuration file when executed. By default, the Change Capture stage produces an output change link with which two characteristics? (Choose two.)

A) added column named Change_Code
B) Table Definition based on the after input link
C) added column named Difference_Value
D) Table Definition based on the keys of the input link

3. What two repositories does the Source Code Control Integration for DataStage and QualityStage serve? (Choose two.)

A) Universe Project Repository
B) Source Code Repository
C) Information Analyzer Repository
D) Information Server meta-data Repository

4. Refer to the exhibit.

You are responsible for improving performance for a given job. From reviewing the job dump score, you notice that many tsort operators are inserted. Join_1 is on columns "account", "po_date" and "hdr_number". Join_2 is based on "account", "hdr_number", "paid_date".
Which two actions will help you improve the performance without changing the business logic?
(Select two)

A) Partition on account and hdr_numberfor all joins. Change Join_1 to join on "account", "hdr_number" and "po_date". Insert Sort between Join_1 and Join_2 and subsort ("Don't sort previously sorted") on "account".
B) Partition on account and hdrnumber for all joins. Change Join_1 to join on "account", "hdrnumber" and "po_date". Insert Sort between Join_1 and Join_2 and subsort ("Don't sort previously sorted") on "account" and "hdr_number" and sort on "paid_date".
C) Insert sort stage between Join_1 and Join_2, subsort ("Don't sort, previously sorted") on "account", sort "hdr_number" and "paid_date".
D) Partition on "account" and "hdr_number" for all joins. Change Join_1 to join on "account", "hdr_number" and "po_date". Add Add $APT_SORTJNSERTION_CHECK_ONLY to job parameter list and set it to "True".

5. Which three statements are true about File Sets? (Choose three.)

A) File sets are partitioned.
B) File sets are readable by external applications.
C) File sets are stored as header file and data files.
D) File sets have a proprietary data format which may change in future DataStage versions.
E) File sets always execute in parallel.

Solutions: