Updated: Jul 23, 2026
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| Certification Vendor: | IBM |
| Exam Name: | IBM Assessment: InfoSphere DataStage v8.5 |
| Exam Number: | A2090-421 |
| Exam Price: | Varies by region (often included in training or assessment programs) |
| Certificate Validity Period: | Not applicable (assessment exam; does not grant standalone certification validity period) |
| Passing Score: | 70% |
| Real Exam Qty: | 40-60 |
| Exam Format: | Multiple choice, Multiple response |
| Related Certifications: | IBM Certified Solution Developer - InfoSphere DataStage IBM InfoSphere Information Server certifications |
| Available Languages: | English |
| Exam Duration: | 60-75 |
| Sample Questions: | IBM C2090-421 Sample Questions |
| Exam Way: | Online or onsite proctored exam (typically delivered via Pearson VUE or IBM assessment systems) |
| Pre Condition: | Recommended familiarity with IBM InfoSphere DataStage v8.5 concepts and basic ETL/data integration knowledge |
| Official Syllabus URL: | https://www.ibm.com/certify |
| Section | Objectives |
|---|---|
| Topic 1: DataStage Architecture and Fundamentals | - Core architecture concepts
|
| Topic 2: Job Design and Development | - Building DataStage jobs
|
| Topic 3: Monitoring and Administration | - Job control and troubleshooting
|
| Topic 4: Performance and Optimization | - Parallel execution tuning
|
| Topic 5: Data Connectivity and Integration | - Source and target systems
|
1. A scenario requires selecting only the most recent transactions for each of 2 million unique customers, from a 20 million row DB2 source table containing order history. Which parallel job design would satisfy this functional requirement?
A) Select all rows using the ODBC Connector stage, use a Sort Aggregator on customer number key to select the maximum order date.
B) Using the Dynamic Relational stage, use custom SQL to select all DISTINCT customer numbers from the order history table.
C) Using the DB2 API stage, select all rows. Use a Sort stage with customer number and order date sort keys in ascending order, then Remove Duplicates with Last Duplicate to retain.
D) Using the DB2 Enterprise stage, select all rows. Perform a unique Sort using customer number and order date sort keys in ascending order.
2. Your job sequence must be restartable. It runs Job1, Job2, and Job3 serially. It has been compiled with "Add checkpoints so sequence is restartable". Job1 must execute every run even after a failure. Which two properties must be selected to ensure that Job1 is run each time, even after a failure? (Choose two.)
A) Use the Nested Condition Activity with a trigger leading to Job1; set the trigger expression type to "Unconditional".
B) In the Job1 Activity stage set the Execution action to "Reset if required, then run.".
C) Set the Job1 Activity stage to "Do not checkpoint run.".
D) Set trigger on the Job1 Activity stage to "Unconditional".
3. What two features enable a job with a Sequential File stage to read from sequential files with different numbers of columns and types? (Select two)
A) Schema File property
B) Runtime Column Propagation
C) Vector data type
D) Subrecord data type
4. What stage allows for more than one reject link?
A) Funnel stage
B) Merge stage
C) Peek stage
D) Lookup stage
E) Join stage
5. You are setting up the parallel engine configuration file. Which two statements are true about file system efficiency? (Select two)
A) Creating scratch disk space on an internal disk improves sort performance than NFS drive.
B) In a clustered environment where NAS is used for a common storage, specify the internal disk for scratch disk.
C) Specify a directory for the resource disk in the partition where the engine is installed.
D) Using multiple scratch spaces in a logical node improves performance.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: B,C | Question # 3 Answer: B,D | Question # 4 Answer: B | Question # 5 Answer: B,C |
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