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Updated: Aug 31, 2026
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IBM COG-125 Exam Overview:
| Certification Vendor: | IBM |
|---|---|
| Exam Name: | IBM Cognos 8 BI Data Warehouse Developer |
| Exam Number: | COG-125 / BI0-125 |
| Passing Score: | 70% |
| Exam Format: | Multiple Response, Single Answer, Multiple Choice |
| Available Languages: | Japanese, English |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 84 |
| Related Certifications: | IBM Cognos 8 BI Multidimensional Author IBM Cognos 8 BI Metadata Model Developer |
| Certificate Validity Period: | 3 years |
| Exam Price: | USD 150 |
| Exam Registration: | Prometric Testing (Retired) |
| Sample Questions: | IBM COG-125 Sample Questions |
| Exam Way: | Proctored at Prometric test centers; retired exam no longer available for registration |
| Pre Condition: | No formal prerequisites; recommended experience with relational databases, SQL, and data warehousing concepts |
IBM COG-125 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Warehouse Concepts and Architecture | 20% | - Metadata and data lineage - Enterprise data warehouse architecture - Data warehouse vs operational database - OLAP vs OLTP principles |
| Topic 2: Deployment and Maintenance | 10% | - Backup and recovery strategies - Security and access control - Monitoring and tuning |
| Topic 3: ETL Design and Implementation | 25% | - Data quality and cleansing - Error handling and recovery - Extract, Transform, Load processes - Incremental and full loads |
| Topic 4: Dimensional Data Modeling | 25% | - Fact and dimension tables - Star and snowflake schemas - Slowly Changing Dimensions (SCD) - Surrogate keys and hierarchies |
| Topic 5: Cognos 8 BI Data Warehouse Integration | 20% | - Framework Manager and data source setup - Optimizing warehouse for Cognos reporting - Query performance and indexing |
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