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Updated: Aug 31, 2026
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IBM COG-645 Exam Overview:
| Certification Vendor: | IBM |
|---|---|
| Exam Name: | IBM Cognos 10 BI Multidimensional Author |
| Exam Number: | COG-645 (replaced by C2090-645) |
| Real Exam Qty: | 57 - 64 |
| Available Languages: | English, Japanese |
| Certificate Validity Period: | 3 years |
| Exam Format: | Multiple-response, Multiple-choice |
| Passing Score: | 70% - 75% |
| Exam Duration: | 60 - 90 |
| Exam Price: | Approx. $200 USD (varies by region) |
| Related Certifications: | IBM Cognos 10 BI Author IBM Cognos 10 BI Advanced Author |
| Recommended Training: | IBM Cognos 10 BI Multidimensional Author Training IBM Cognos 10 BI Multidimensional Reports Course |
| Exam Registration: | IBM Certification Portal Pearson VUE Registration |
| Sample Questions: | IBM COG-645 Sample Questions |
| Exam Way: | Onsite at Pearson VUE test centers / Online proctored |
| Pre Condition: | No formal prerequisites; basic knowledge of IBM Cognos BI and reporting recommended |
| Official Syllabus URL: | https://www-03.ibm.com/certify/exam.html?id=C2090-645 |
IBM C2090-645 Exam Syllabus Topics:
| Topic | Details | Weights |
|---|---|---|
| Drill-through Access | -Identify supported drill-through data item combinations -Set-up drill-through access -Describe a conformed dimension | 8% |
| Calculations and Dimensional Functions | -Describe the use of arithmetic operations in queries -Analyze the use of dimensional functions in queries -Examine coercion -Apply prompts to focus reports -Compose complex expressions that combine and reuse existing expressions | 36% |
| Dimensional Data Components | -Distinguish between relational, DMR, and dimensional data sources -Identify dimensional data items and expressions -Define multidimensional data structure components -Describe the importance of report context -Identify the default measure of a report -Describe default members and their purpose -Describe what a MUN is and identify the impact of using the wrong MUN -Describe what a set is -Describe what a tuple is | 28% |
| Drilling in Reports | -Describe default drill-down behavior -Describe default drill-up behavior -Describe cases for advanced drilling configuration -Appraise reports generated with calculations that are preserved during drilling -Describe how member sets work | 14% |
| Focus Reports | -Distinguish between dimensional and relational filtering styles -Identify techniques to focus data using the dimensional style -Interpret data that is focused based on members -Interpret data that is filtered based on measure values -Describe the purpose of a slicer | 14% |
Reference: https://www-03.ibm.com/certify/exam.html?id=C2090-645
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