Exam Name: InfoSphere DataStage v8.5
Certification Provider: IBM
Corresponding Certification: IBM Specialist
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IBM C2090-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Administration and Deployment | 10% | - Monitoring and logging - Version control and migration - Job packaging and deployment |
| Performance and Tuning | 20% | - Buffer and sort tuning - Resource management - Job optimization and scaling |
| Environment and Configuration | 25% | - Configuration files and environment variables - Distributed and asymmetric environments - Project setup and administration |
| Data Integration and Connectivity | 15% | - Database connectivity and stages - Specialized stages and connectors - File handling and formats |
| Job Design and Development | 30% | - Partitioning and collecting methods - Parallel job design principles - Stage configuration and properties - Transformer and derivation logic |
IBM InfoSphere DataStage v8.5 Sample Questions:
Click the Exhibit button.
These three Sequential Files shown in the exhibit need to be joined. Join_1 is on Columns CustID and OrderID. Join_2 is on CustID and LocationID. What is the most efficient hash partitioning strategy for each link?
- A. For LinkA Hash Partition on OrderID and CustID; For LinkB Hash Partition on OrderID and CustID; For LinkC Hash Partition on LocationID and CustID; For LinkD Hash Partition on LocationID and CustID.
- B. For LinkA Hash Partition on CustID and OrderID; For LinkB Hash Partition on CustID and OrderID; For LinkC Hash Partition on CustID and LocationID; For LinkD Hash Partition on CustID and LocationID.
- C. For LinkA Hash Partition on CustID;
For LinkB Hash Partition on CustID;
For LinkC Same Partition;
For LinkD Hash Partition on CustID. - D. For LinkA Hash Partition on CustID, OrderID and LocationID; For LinkB Hash Partition on CustID, OrderID and LocationID; For LinkC Hash Partition on CustID, OrderID and LocationID; For LinkD Hash Partition on CustID, OrderID and LocationI
Correct Answer: C 🗳️
Which three parallel job stages allow you to use partial schemas? (Select three)
- A. Dataset stage
- B. Peek stage
- C. External Source stage
- D. Sequential File stage
- E. Column Import stage
Correct Answer: C,D,E 🗳️
Explanation: Only visible for NewPassLeader members. You can sign-up / login (it's free).
How are Host Systems added to the Shared Metadata repository? (Select two)
- A. Use the DataStage Administrator application to import new Host Systems.
- B. Use the shared table creation wizard from the DataStage client to add a new Host System.
- C. Use the Import/Export Manager when importing shared metadata.
- D. Select Repository > Metadata Sharing > Management from the main menu to open the Shared Metadata Management tool
Correct Answer: D 🗳️
Explanation: Only visible for NewPassLeader members. You can sign-up / login (it's free).
Which job design technique can be used to give unique names to sequential output files that are used in multi-instance jobs?
- A. Use DSJobInvocationID to generate a unique filename.
- B. Use parameters to identify file names.
- C. Use a Transformer stage variable to generate the name.
- D. Generate unique file names by using a macro.
Correct Answer: B 🗳️
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 "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".
- 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 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".
Correct Answer: B,D 🗳️
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