Data Modeling Quiz Questions
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20 questions
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- Q1What is the primary purpose of data modeling in Power BI?To simplify programming tasksTo structure data for analysisTo increase data storageTo improve data entry speed40s
- Q2Which type of relationship is most commonly used in Power BI data models?Many-to-manyOne-to-oneOne-to-manyMany-to-one40s
- Q3What is a Star Schema in data modeling?A schema where all tables are related in a circular mannerA method to create hierarchical data modelsA type of database schema that uses one fact table and several dimension tablesA way to store unstructured data40s
- Q4What is a primary key in data modeling?A unique identifier for a record in a tableA key that can be duplicated across tablesA key used only for creating relationshipsA non-unique identifier for a record40s
- Q5What is the benefit of using a Snowflake Schema over a Star Schema?Increases query performanceReduces data redundancyRequires fewer tablesSimplifies the schema design40s
- Q6Which DAX function is used to create calculated columns?ADDCOLUMNSSUMRELATEDCALCULATE40s
- Q7What is the role of a fact table in a data model?Stores quantitative data for analysisStores user informationStores dimensional dataStores metadata40s
- Q8Which of the following is a best practice for handling many-to-many relationships in Power BI?Create a direct relationshipUse calculated columnsAvoid relationshipsUse a bridging table40s
- Q9What does the RELATEDTABLE() function do in DAX?Joins two tablesCalculates the total for a related tableFilters data in a related tableReturns a table related to the current table40s
- Q10What is the purpose of using hierarchies in Power BI?To enable drill-down capabilitiesTo store metadataTo avoid data redundancyTo create flat data structures40s
- Q11How does Power BI handle circular dependencies in data models?It resolves them automaticallyIt does not allow themIt ignores themIt combines the tables40s
- Q12What is the use of calculated tables in Power BI?To create relationshipsTo store raw dataTo import data from external sourcesTo create new tables based on DAX formulas40s
- Q13What is the primary advantage of using DirectQuery mode in Power BI?Reduced storage requirementsSimplified data modelingFaster query performanceReal-time data updates40s
- Q14What is the role of dimension tables in a data model?To store descriptive attributes related to fact dataTo store quantitative dataTo create calculated columnsTo manage user permissions40s
- Q15Which of the following is a characteristic of a good data model?Complex relationshipsMinimal indexingHigh data integrityHigh data redundancy40s